- Type of paper
: Paper in journal
Title: Application of Computers in Welding
- Authors:
- Kralj, Slobodan (23211)
- Andrić, Šimun (531)
- Tomašević, Katica (175065)
Journal: Zavarivanje
Number: 3
ISSN: 0044-1902
Volume: 34
Year: 1991
Pages: from 109 to 117
Number of references: 101
Language: hrvatski
Summary: In the first part of the paper, a brief history of the
computersdevelopment and description of basic units of a copmuter
aregiven.In the second part, peculiarites of computer application incertain
fields of welding are given. Trough the search of avaiblereferences, nine
fields of application have been indentified, andattention was paid to the
fields considered to be of greaterimportance due to coplexitor volume of a
job.
Keywords: computer,welding,application
- Type of paper
: Paper in journal
Title: The Expert Systems in Welding
- Authors:
- Kralj, Slobodan (23211)
- Andrić, Šimun (531)
- Andrić, Šimun (531)
Journal: Zavarivanje
Number: 5
ISSN: 0044-1902
Volume: 34
Year: 1991
Pages: from 143 to 153
Number of references: 25
Language: hrvatski
Summary: Nowdays, there is wide application of computers in planning
ofactivities, cost analysys and monitoring of other complexsituation.
Another important field of application is mass storageof data upon base and
filler materials used in fabrication andwelding procedures, aim being to
ensure promt access to allrelevant data. Next step in development in this
field is creatingexpert system, which will link all segments into a
singlepackage. This would enable, using the stored expert knowledge,making
more reliable and justified decision on executing ofwelding jobs. Beside
the general survery, a development in thisfield at Faculty of Mechanical
engineering and Naval arhitectureis shown.
Keywords: expert systems, welding, welding consumables
- Type of paper
: Paper in journal
Title: Programming of the Robots
- Authors:
- Kralj, Slobodan (23211)
- Kožuh, Zoran (186521)
Journal: Zavarivanje
Number: 1
ISSN: 0044-1902
Volume: 36
Year: 1993
Pages: from 259 to 266
Number of references: 21
Language: hrvatski
Summary: Methods of the programming of a robot, their development
arepresented in the paper. Also, economic and tecnical features ofdifferent
methods of programming are compared, the mainconsederation being the time
required for reprogramming. Basicideas of "on-line" and "off-line"
programming approach arepresented, as well as a hybrid (mixed) one. As an
example of theoff-line programming the ROBCAD software package is discused.
Keywords: programming of robot, welding, on-line programming, off-line programming
- Type of paper
: Paper in journal
Title: Robotization in Welding Engineering
- Authors:
- Kralj, Slobodan (23211)
- Kožuh, Zoran (186521)
Journal: Energetika,Gospodarstvo,Ekologija,Etika
Number: 4
ISSN: 1330-0628
Volume: 1
Year: 1993
Pages: from 12 to 13
Number of references: 18
Language: hrvatski
Summary: The paper describes the features of modern welding
robots,presenting their capabilities and programmability. The state
ofwelding robotization in Croatia, i.e. the representation ofwelding robots
in Croatian industries and justification of theirapplication are pariculary
discussed. The atempt was to forecastthe robotization development in
Croatia. Description of theresearch project "Use of Robots and Lasers" at
the Faculty ofMecahical and Naval Engineering in Zagreb in cooperation with
ECand Ministry of Science and Technology of the Republic of Croatiais
presented.
Keywords: robotization,welding,development,programming of robot
- Type of paper
: Paper in journal
Title: Welding Development Strategy in Croatia
- Authors:
- Kralj, Slobodan (23211)
Journal: Energetika,Gospodarstvo,Ekologija,Etika
Number: 4
ISSN: 1330-0628
Volume: 1
Year: 1993
Pages: from 44 to 45
Number of references: 14
Language: hrvatski
Summary: The attainment of independence of the Republic of Croatia
hasconditionned also a need to determine the state's developmentstrategy.
Therefore, the Croatian Welding Engineering Societyorganized the conference
"Welding Development Strategy ofCroatia" held in Opatija on October
14-16,1993.
Keywords: development,welding,Croatia
- Type of paper
: Paper in journal
Title: Investigation of Welding Parameters and Surface Condition
upon the Pitting Corrosion on High Alloy Stell Weldments
- Authors:
- Juraga, Ivan (15010)
- Sorić, Tomislav
- Kačan, Ivica
Journal: Zavarivanje
Number: 1
ISSN: 0044-1902
Volume: 34
Year: 1991
Pages: from 13 to 20
Number of references: 12
Language: hrvatski
Summary: Basic characteristics of high alloyed austenitic and
superferritic steel are discussed, with special concern being paid
toweldability. In the part of paper dealing with the experimentalwork,
parametars for welding of 1mm thik sheet applying pulse andconventional TIG
process are presented. Also result of chemicalanalysis, testing of
mechanical properties, together with weldmacroetches are given. Separatly,
testing of pitting corrosionressistance of welded joints are performed,
results beingyielded by the gravimetric mass-loss method.
Keywords: welding,high alloy stell,pitting corrosion
- Type of paper
: Paper in journal
Title: GTAW Welding of Titanium
- Authors:
- Ribar, Zvonko
- Juraga, Ivan (15010)
- Jarić, Marija (71846)
Journal: Zavarivanje
Number: 3
ISSN: 0044-1902
Volume: 34
Year: 1991
Pages: from 85 to 92
Number of references: 2
Language: hrvatski
Summary: In the article the titanium properties are presentes
withproblems in welding of this materials. In experimental partwelding
condition with one milimetar Ti 99.5 sheet and GTAW andpulse GTAW procedure
are defined. Also some structural andmechanical properties are given.
Keywords: welding,titanium, properties
- Type of paper
: Paper in journal
Title: High Strenght Low Alloyed Steels-Reasons for Application
- Authors:
- Kralj, Slobodan (23211)
- Kovačićek, Franjo (57020)
Journal: Zavarivanje
Number: 3
ISSN: 0044-1902
Volume: 34
Year: 1991
Pages: from 101 to 108
Number of references: 13
Language: hrvatski
Summary: In the article, development of high-strenght low-alloyed
steelshas been described. Reasons for achieving improved values ofyield
stress has been mentioned. Also, limitations of applicationof such
materials has been expalained. One of the main limitingfactors is decrease
of wall thickness due corrosion progress asfor the plain structural steel.
Specially, requirements specifiedfor modern structural steel grades has
been discussed.
Keywords: HSLA steels, application, foundation
- Type of paper
: Paper in journal
Title: Austenite-Ferrite Steel Resistant to Corrosion (DUPLEX
steel)
- Authors:
- Samardžić, Ivan
- Novosel, Mladen
- Juraga, Ivan (15010)
Journal: Zavarivanje
Number: 1
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 19 to 35
Number of references: 29
Language: hrvatski
Summary: The historical development, properies and application of
DUPLEXsteel have been discussed. Special considerations have been givento
structure, chemical, mechanical and corrosion resistanceproperties. Basic
requirements and specific features of weldingand plastic forming
technologies are given.
Keywords: duplex steel,properties,welding
- Type of paper
: Paper in journal
Title: Parameters and their Influence at Pulse Mig Welding
- Authors:
- Grubić, Kajo (14685)
Journal: Zavarivanje
Number: 2
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 67 to 76
Number of references: 17
Language: hrvatski
Summary: In the article, metal transfer during pulse MIG welding has
beenstudied. Investigation of the most appropriate welding conditionshas
been performeed, applying 1.2 mm dia. wire of AlMg5 grade.Mathematically
formulated relationships between given parametersare found. Also, an
analysis of factors influencing the wiremelting rate is made. Rather wide
range of parameters has beendetermined, where there are no significant
changes in wiremelting rate and arc lenght.
Keywords: pulse MIG welding,welding parameters,mathematical model,wirw melting rate
- Type of paper
: Paper in journal
Title: Austenite-Ferrite Steel Resistant to Corrosion (DUPLEX)
Steel-second part
- Authors:
- Samardžić, Ivan
- Novosel, Mladen
- Juraga, Ivan (15010)
Journal: Zavarivanje
Number: 2
ISSN: 0044-1902
Volume: 2
Year: 1992
Pages: from 85 to 96
Number of references: 29
Language: hrvatski
Summary: The historical development, properties and application of
DUPLEXsteel have been discussed. Special consideration have been givento
structure, chemical, mechanical and corrosion resistanceproperties. Basic
requirements and specific features of weldingand plastic forming
technologies are given.
Keywords: duplex steel,properties,welding
- Type of paper
: Paper in journal
Title: Analysis of Corrosion Damages on a High Alloyed Steel
Welded Structure
- Authors:
- Sorić, Tomislav
- Lypolt, Ana
- Juraga, Ivan (15010)
Journal: Zavarivanje
Number: 2
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 97 to 100
Number of references: 1
Language: hrvatski
Summary: An analysis of corrosion damages registered on the members
of awelded structure operating as a part of a water demineralizationplant.
Damaged parts of the structure has been manufactured ofthe unproper grade
of high alloyed austenitic steel for the givenservice conditions.
Keywords: high alloyed steel, corrosion, welded joint
- Type of paper
: Paper in journal
Title: Development of MIG/MAG Power Sources
- Authors:
- Grubić, Kajo (14685)
Journal: Zavarivanje
Number: 3
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 145 to 154
Number of references: 13
Language: hrvatski
Summary: A historical survey of development of power sources for
MIG/MAGwelding is given. General principles of operation and advantagesof a
particular type over the other power sources are discussed,together with
their possible practical application in fabricationprocess.
Keywords: power sources,MIG/MAG welding,develpment
- Type of paper
: Paper in journal
Title: Methods Used for Testing the Susceptibilty to Cold
Cracking
- Authors:
- Sorić, Tomislav
- Kralj, Slobodan (23211)
- Grubić, Kajo (14685)
Journal: Zavarivanje
Number: 5
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 199 to 208
Number of references: 100
Language: hrvatski
Summary: Methods used for testing the suscebility to cold cracking
hasbeen described. The survey has been made separatly for analyticaland
experimental ones. The experimental method are classifiedinto three groups,
i.e. welding with self-constraint, withexternal constraint and simulation
of the welding cycle inspecial devices. Based on the reference search, a
frequency ofuse of each method had been given. Also, approximative costc
oftesting for several method are given.
Keywords: weldability,cold cracks,testing methods,C-equivalent
- Type of paper
: Paper in journal
Title: HSLA Steel-Mechanisms of Strenghtening
- Authors:
- Samardžić, Ivan
- Kralj, Slobodan (23211)
- Novosel, Mladen
Journal: Zavarivanje
Number: 5
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 219 to 227
Number of references: 11
Language: hrvatski
Summary: A survey of methods producing the increased strenght of
steel isgiven. Also, physical facts causing increase of yield strenghtare
explained. A special concern has been given to the methodsfor disabling of
dislocation movements, applying point, line orplanar obstacles. Beside the
explanation of single method effect,a survey of effects of several methods
applied simultaneously isdiscussed. As well, a susceptibility of steel to
brittle fracturecaused be strenghtening effect is exlpained.
Keywords: high strenght steel,HSLA steel,strenghtening,low alloyed steel,development
- Type of paper
: Paper in journal
Title: High Efficiency Rutile Covered Electrodes
- Authors:
- Krolo, Ante
- Juraga, Ivan (15010)
- Grubić, Kajo (14685)
- Kovačić, Ante
Journal: Zavarivanje
Number: 1
ISSN: 0044-1902
Volume: 36
Year: 1993
Pages: from 281 to 286
Number of references: 5
Language: hrvatski
Summary: Basic features and application of rutile covered electrodes
ofhigh aeeiciency for the manual arc welding are presented. Sometesting of
the ekctrode grades EZ-130 and EZ-160 manufactured byElektroda-Zagreb has
been made. Measured values regarding theefficiency and mechanical
properties of a welded joint are given.
Keywords: high efficiency covered electrodes,characteristics,application, testing
- Type of paper
: Paper in journal
Title: Engineering Quality Assurance and Ecology
- Authors:
- Kralj, Slobodan (23211)
- Krstelj, Vjera (24006)
Journal: Strojarstvo
Number: 5
ISSN: 0562-1887
Volume: 33
Year: 1991
Pages: from 343 to 347
Number of references: 5
Language: hrvatski
Summary: The article is an echo to the growing meaning of ecology,
bywhich an attempt is made to indroduce this concept into the fieldof
engineering through the quality assurance. The role andresponsibilities of
an engineer in the enviromental control isdiscussed, special concern being
given to the rensponsibilitiesof those engaged in the field of mechanical
engineering. Newconcept of assesment of products and processes are shown in
starting at the point of desing, to the stage of service andproduct
scraping.
Keywords: ecology,quality control,mechanical engineering
- Type of paper
: Paper in journal
Title: Croatian Welding Society
- Authors:
- Kralj, Slobodan (23211)
Journal: Energetika,Gospodarstvo,Ekologija,Etika
Number: 1
ISSN: 1330-0628
Volume: 1
Year: 1993
Pages: from 101 to 101
Language: hrvatski
- Type of paper
: Paper in journal
Title: Quality Management
- Authors:
- Krstelj, Vjera (24006)
Journal: Zavarivanje
Number: 3
ISSN: 0044-1902
Volume: 35
Year: 1992
Pages: from 139 to 143
Number of references: 17
Language: hrvatski
Summary: Quality managment as a systematic approach which, regarding
theefficiency and possibilities in increasing productivity andresulting
higher profit, should be considered the top priority inany enterprise. A
description of this concept, supported bynecessary explantations and
recommendations pursuing theapplications programs is given. Specially, the
influence oftraining in the quality management system establishing
ispointed. The world established experiences and home performedresearch
work confirm that even partial implementation of qulitymanagement system,
before attaining full size system, yieldsresults which are both, fully
justified and stimulative forfurther efforts. Total quality management
approach is animportanat internal resource of Croatia on its way
ofdevelopment.
Keywords: quality,control,management,welding
- Type of paper
: Paper in proceedings
Title: Perpectives of Robotization in Welding
- Authors:
- Kralj, Slobodan (23211)
- Kožuh, Zoran (186521)
Proceedings title: Strategija razvoja zavarivanja u Hrvatskoj
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 55 to 69
Meeting: Strategija razvoja zavarivanja u Hrvatskoj
Held: from 10/14/93 to 10/16/93
Summary: Survival on the world market will be ensured only for
those, whowill be able to meet severa requirements. Robotization will be
acritical factor in expanding and keeping position of Croatianwelding
fabricators on the world market. Current state in thefiled of robotization
and welding in Croatia, as well asconsideration of situacion in the world
are discussed.Perspectives of robotization in welding technology in Croatia
andfuture trends, as seen by authors and professionals enganed
infabrization are presented.
Keywords: robotization,welding
- Type of paper
: Paper in proceedings
Title: Application of Lasers for Welding and Cutting
- Authors:
- Grubić, Kajo (14685)
- Misir, Tomislav (184256)
Proceedings title: Strategija razvoja zavarivanja u Hrvatskoj
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 71 to 96
Meeting: Strategija razvoja zavarivanja u Hrvatskoj
Held: from 10/14/93 to 10/16/93
Summary: In this article funamentals of cutting and welding
processesusing laser beam are considered.Physical principles, some
detailsof parametars and their effect upon the process are
discussed.Comment are given on the possibilities of two main types oflasers
(CO2 and Nd-YAG) and applicable configurations forindustrial purpose in
cutting and welding. Applications forcertaine types of materials such as
carcon, structural andstainless steel and aluminium are described.
Keywords: laser,configuration,application
- Type of paper
: Paper in proceedings
Title: Welding of Plastics
- Authors:
- Andrić, Šimun (531)
- Grubić, Melanija
- Tucelj, Tatjana
Proceedings title: Strategija razvija zavarivanja u Hrvatskoj
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 121 to 143
Meeting: Strategija razvoja zavarivanja u Hrvatskoj
Held: from 10/14/93 to 10/14/93
Summary: Processes used in welding of plastic materials are
discussed.Also, a forecast of increase of application of plastics in
modernengineering is given. Most widely accepted welding processes
infabrication of pipelines are described. The largest increase ofwelding is
expected in production of low and medium pressurepipelines.
Keywords: welding processes, pipelines
- Type of paper
: Paper in proceedings
Title: Welding of High Alloyed Steel
- Authors:
- Juraga, Ivan (15010)
Proceedings title: Strategija razvoja zavarivanja u Hrvtskoj
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 143 to 167
Meeting: Strategija razvoja zavarivanja u Hrvatskoj
Held: from 10/14/93 to 10/16/93
Summary: Classification of high alloyed, corrosion resistant steel
hasbeen presented, together with characteristics of steel andexamples of
applications. Besides, survey of development isconsidered. Also,
peculiarites of these materials relatedweldeability are discussed.
Keywords: high alloyed steel,applications,weldability
- Type of paper
: Paper in proceedings
Title: Software in Welding
- Authors:
- Andrić, Šimun (531)
- Kožuh, Zoran (186521)
Proceedings title: Strategija zavarivanja u Hrvatskoj
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 203 to 215
Meeting: Strategija razvoja zavarivanja u Hrvatskoj
Held: from 10/14/93 to 10/16/93
Summary: Some applications of computers and applicable software
supportintended for welding tecnology are presented. Mainly
programmepackages requiring personal computers or work station
areconsidered. This is a filed having a very high rate of expansion.Also, a
rewiew of State in Croatian industry and worldwide isdiscussed.
Keywords: computers,software support,welding technology
- Type of paper
: Paper in proceedings
Title: Certification of Manufacturers for Fabrication by Welding
and High-Level Educated Welding Personnel
- Authors:
- Grubić, Kajo (14685)
Proceedings title: Strategija razvoja zavarivanja u Hrvatskoj
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 227 to 231
Held: from 10/14/93 to 10/16/93
Summary: Croatia is an European state that has an intention to take
itspart of European and world market as soon as possible. If weldedproducts
are considered, Croatian fabricators have to meetcertain requirements and
responsible welding personnel should betrained according to the programmes
established in europeancountries. Basic requirements that fabricators
should meet whileproducing the welded structures are listed. Also basic
level ofknowledge required for the personnel enganged in
organization,production and inspection of welding operations is
considered.Besides, a review of rules and codes, and education of
weldingperosnnel in Europe (partivulary according to the EWF
weldingengineer course) is given.
Keywords: certification,manufacturers,welding personnel
- Type of paper
: Paper in proceedings
Title: Requirements upon European Welding Engineers and Welding
Technologists
- Authors:
- Kralj, Slobodan (23211)
Proceedings title: Europske norme i zavarivanje
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 59 to 73
Meeting: Europske norme i zavarivanje
Held: from 06/17/92 to 06/17/92
- Type of paper
: Paper in proceedings
Title: Certificate of Manufacturers Competence in Welding
Operations - Codes and Requirements
- Authors:
- Grubić, Kajo (14685)
Proceedings title: Europske norme i zavarivanje
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 73 to 85
Meeting: Europske norme i zavarivanje
Held: from 06/17/92 to 06/17/92
- Type of paper
: Paper in proceedings
Title: Surfacing-Brazing-Metal Spraying:Advantages and
Disadvantages
- Authors:
- Kralj, Slobodan (23211)
Proceedings title: Tribologija u agroindustrijskom kompleksu
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 5 to 13
Meeting: Tribologija u agroindustrijskom kompleksu
Held: from 09/23/93 to 09/23/93
Summary: Possible applications of surfacing, spraying and brazing
inreconditioning and protection of parts against wear inagricultural
industry are presented. List of possible processesis supplied, but those
which are practically applicable areponted out. Problems which could be
encontered when a givenprocess is applied are pinpointed. A suggestion for
a systematicapproach in solving a particular case of reconditioning
isproposed.
- Type of paper
: Paper in proceedings
Title: Corrosion Damages on High Alloy Weldments
- Authors:
- Juraga, Ivan (15010)
- Lypolt, Ana
Proceedings title: Materijali i zavarivanje u naftnim i petrokemijskim postrojenjima
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 321 to 328
Meeting: Materijali i zavarivanje u naftnim i petrokemijskim postrojenjima
Held: from 11/19/92 to 11/20/92
Summary: Several characteristic corrosion danages on high
alloyedweldments have been reported. Damges appeared during service lifeof
equipment. Also, some results of laboratory testing ofweldments coerrosion
resistance towards pitting on high alloyedsteel are given. Mecahanisms of
the most frequent phenomena in azone of a welded joint are schematically
presented.
Keywords: stainless steel,welding joint,corrosion
- Type of paper
: Paper in proceedings
Title: Research in the Field of Welding
- Authors:
- Kralj, Slobodan (23211)
Proceedings title: Suvremeni trendovi proizvodnog strojarstva
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 45 to 49
Meeting: Suvremeni trendovi proizvodnog strojarstva
- Type of paper
: Paper in proceedings
Title: Certification in Nondestructive Testing
- Authors:
- Krstelj, Vjera (24006)
- Markučič, Damir (175043)
Proceedings title: Strategija razvoja zavarivanja u Hrvatskoj
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 241 to 255
Meeting: Strategija razvoja zavarivanja u Hrvatskoj
Held: from 10/14/93 to 10/16/93
Summary: Nondestructive testing within the quality assurance.
Developmentof data banks as a part of implementation of quality
assurancesystems, with an aim to include NDT methods and
certificationprocedure as required by international standards.
Keywords: nondestructive testing, quality assurance, certification procedure
- Type of paper
: Paper in proceedings
Title: Data Banks and Information Systems Corrosion Engineering
- Authors:
- Žagar-Maričić, Alemka (55365)
- Matasić, Susanna
Proceedings title: 10. Savjetovanje o zaštiti materijala i industrijskom finišu
Language: hrvatski
Place: Zagreb
Year: 1992
Pages: from 0 to 0
Meeting: 10. Savjetovanje o zaštiti materijala i industrijskom finišu
Held: from 06/18/92 to 06/19/92
Summary: Un approach to the formation of data banks and
informationsystems for corrosion engineering is presented. The approach
isbased upon international experiences in this field.
- Type of paper
: Paper in proceedings
Title: Information Systems for Corrosion Data and Corrosion
Protection by Polymer Coatings
- Authors:
- Žagar-Maričić, Alemka (55365)
- Rumenjak, Susanna
Proceedings title: 11. Dani društva plastičara i gumaraca
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 0 to 0
Meeting: 11. dani društva plastičara i gumaraca
Held: from 06/15/93 to 06/18/93
- Type of paper
: Paper in proceedings
Title: Test Methods for the Protective Efficiency of Polymeric
coatings on Metal Surfaces
- Authors:
- Žagar-Maričić, Alemka (55365)
Proceedings title: 11. Dani društva plastičara i gumaraca
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 0 to 0
Meeting: 11. dani društva plastičara i gumaraca
Held: from 06/15/93 to 06/18/93
- Type of paper
: Paper in proceedings
Title: Evaluation of Some Important Factors Influencing
Underwater Magnetic Particle Testing
- Authors:
- Krnić, Nikša (122696)
- Anzulović, Boris
Proceedings title: Proceedings - International Conference on Underwater Welding
Language: engleski
Place: New Orleans, Louisiana,U.S.A.
Year: 1991
ISBN/ISSN: 0-87171-358-6
Pages: from 86 to 97
Meeting: Proceedings-International Conference on Underwater Welding
Held: from 03/20/91 to 03/21/91
Summary: The capabilities of underwater magnetic particle testing
wereassessed in laboratory research and real dives. The impact ofmagnetic
powder type, suspension concentration, magnetizingsystem, coating
thickness, working technique and conditions onthe performance and
sensitivity of underwater MP examination aregiven. Some recommendations
regarding UW MPI are outlined.
Keywords: underwater inspection, magnetic particle inspection
- Type of paper
: Paper in proceedings
Title: Underwater Welding
- Authors:
- Krnić, Nikša (122696)
Proceedings title: Strategija razvoja zavarivanja u Hrvatskoj
Language: hrvatski
Place: Opatija
Year: 1993
Pages: from 97 to 119
Meeting: Strategija razvoja zavarivanja u Hrvatskoj
Held: from 10/14/93 to 10/16/93
Summary: Underwater welding methods along with an overview of
weldingprocess used or investigated underwater are presented.
Typicalindustrial aplications of underwater welding and its capabilitiesare
discussed, as well as some nowdays research and developmentstrends in this
field. A survey of processes allied to welding -underwater non-destructive
testing and cutting is brieflyconsidered. By summarizing the underwater
welding and relatedactivities in Croatia it was the intention to evaluate
how far weare from world's achievements.
Keywords: underwater welding,development,allied processes
- Type of paper
: Paper in proceedings
Title: Training for Underwater Cutting, Welding and
Nondestructive Inspection
- Authors:
- Anzulović, Boris
- Krnić, Nikša (122696)
Proceedings title: Proceedings-International
Pages: from 0 to 0
- Type of paper
: Paper in proceedings
Title: Characterization of a high-power ultrasonic equipment
- Authors:
- Štimac, Tihomir (106950)
- Komeštik, Vladislav
- Svilar, Dragoljub
Proceedings title: 33. simpozij etan-a u pomorstvu
Language: hrvatski
Place: Zadar
Year: 1991
ISBN/ISSN: 0353-4685
Pages: from 363 to 366
Meeting: 33. simpozij etan-a u pomorstvu
Held: from 06/24/91 to 06/26/91
Summary: High power ultrasound has found many applications in
variousfields of research and technology. Strong ultrasonic fields
aregenerated in limited reverberant enclosures, so thecharacterization of
the field and its generator becomes extremelydifficult. In this paper one
possible approach to thecharacterization of the measureble electrical and
acousticalparametars of high power ultrasonic system is given. Thisapproach
has been illustrated by the characterization of an 4 kWequipment for
technological applications in liquids.
- Type of paper
: Paper in proceedings
Title: Ultrasonic Transducer for Level Measurement in Ex Version
- Authors:
- Štimac, Tihomir (106950)
Proceedings title: 34. Međunarodni simpozij ELMAR-a - Zadar
Language: hrvatski
Place: Zadar
Year: 1992
Pages: from 194 to 198
Meeting: 10. Savjetovanje o zaštiti materijala i industrijskom finišu
Held: from 09/28/92 to 09/30/92
Summary: In the article a description of an original technical
solution isgiven for an ultrasonic transducer for measurement of
surfacedistance in liquids and scattered loads, in "O" zones, in
anantiexplosive version. Measurements with such transducers areperformed
through water or withouth contact, through the air. Themeasurement
principle applied is very suitable for levelmeasurements on ships. The
equipment has all neccessary atestsfrom the "S" commission, and the
antiexplosive protection isachieved by a combination of a metalic
impermeable shield and byencapsulation in a compact epoxide casing.
- Type of paper
: Paper in proceedings
Title: An Ultrasonic Draught Meter
- Authors:
- Štimac, Tihomir (106950)
- Crnić, Jezerko
Proceedings title: 35. Međunarodni simpozij ELMAR-a
Language: hrvatski
Place: Zadar
Year: 1993
ISBN/ISSN: 1330-092X
Pages: from 280 to 284
Meeting: 35. Međunarodni simpozij ELMAR-a
Summary: Ultrasonic draught meters represent special and
reliableequipment for measurements of ship draught. The operatingprinciple
is based on measurements of the time, necessary for anultrasonic pulse to
reflect at the boundary of two media andtravel back to the same ultrasonic
transducer, used bytransmission. The measurement is achieved through water
or air.By measurement of ship draught in four points ( fore, aft and
atsides) and by processing the recived data, information on theroll and
pitch is achieved an important data for better shiputilization are
obtained.
- Type of paper
: Paper in proceedings
Title: Investigation of the hydrocaustical Flextensional
Projector Characteristics
- Authors:
- Štimac, Tihomir (106950)
- Habdija, Vladimir
Proceedings title: 33. Simpozij etan-a u pomorstvu
Language: hrvatski
Place: Zadar
Year: 1991
ISBN/ISSN: 0353-4685
Pages: from 367 to 370
Meeting: 33. simpozij etan-a u pomorstvu
Held: from 06/24/91 to 06/26/91
Summary: Because of the great emmited power on relatively low
frequencies,their small dimensions and other advantages,
hydrocausticflextencional projectors are more and more frequently used in
thetechnology of sonar and related equipments. In the paperinvestigation
results of some flextensional projector emmisionphenomena are presented.
- Type of paper
: Paper in proceedings
Title: Important conditions that should be fulfilled by
fabricatoprs to improve quality of welding operations
- Authors:
- Grubić, Kajo (14685)
- Editors
- Krstelj, Vjera (24006)
Proceedings title: NDT in quality system
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96225-0-6
Pages: from 49 to 56
Meeting: Međunarodno savjetovanje KBR u sustavu kvalitete
Held: from 06/16/94 to 06/17/94
Summary: Some comments on important conditions that should be
fulfilled by fabricators requiring the certificate on ability or
fabrication of welded structures, imposed by related standards, are given.
Such certificate is required to improve quality of welding operations. Most
of comments are related to ISO and DIN standards which deal with steel
structures and pressurized vessels (DIN 18800 and DIN 8563). At the end, a
short review of education for welding personnel according to EWE programme
is given, the particular interest being given to education of welding
engineers.
Keywords: quality assurance, certificate, fabricators
- Type of paper
: Paper in proceedings
Title: Quality assurance in robotic arc welding
- Authors:
- Kralj, Slobodan (23211)
- Kožuh, Zoran (186521)
- Editors
- Krstelj, Vjera (24006)
Proceedings title: NDT i quality system
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96225-0-6
Pages: from 141 to 147
Meeting: Međunarodno savjetovanje KBR u sustavu kvalitete
Held: from 06/16/94 to 06/17/94
Summary: Basic features of robotized arc welding are given, together
with methods sed in quality assurance for this process. A short review of
ISO 9000 standards is given as well as their ability for the robotized arc
welding. Also possible linkage of this welding process to the computer
aided quality assurance system (CAQ), and consequently to the computer
integrated manufacturing concept (CIM) is discussed. Current achievements
in manufacturing high quality products are indicated, together with a
necessity to reduce NDT activities within technological route, which will
in turn, increase production output.
Keywords: robotic arc welding, quality assurance
- Type of paper
: Paper in proceedings
Title: NDT in Croatia
- Authors:
- Krstelj, Vjera (24006)
- Editors
- Krstelj, Vjera (24006)
Proceedings title: NDT in quality system
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96225-0-6
Pages: from 3 to 8
Meeting: Međunarodno savjetovanje KBR u sustavu kvalitete
Held: from 06/16/95 to 06/17/94
Summary: The development of nondestructive testing methods in
Croatia and the significant role of the National Nondestructive Testing
Society in it is presented. It is pointed out that the very important role
in the process of NDT development was the wright policy of the Croatian NDT
Society to focus the activity to the Qualification and Certification of the
nondestructive testing personnel. The paper also present the possibilities
for future work together with the present state in comparing to the
development countries. It is pointed out the bene fits of the NDT in the
national economy, health and safety.
Keywords: quality, nondestructive testing, quality assurance, qualification, NDT strategy
- Type of paper
: Paper in proceedings
Title: Validation of mathematical model for ultrasonic testing
- Authors:
- Šakić, Nikola (74190)
- Markučič, Damir (175043)
- Editors
- Krstelj, Vjera (24006)
Language: hrvatski
Year: 1995
Meeting: Međunarodno savjetovanje Ispitivanje u eksploataciji
Held: from 10/05/95 to 10/06/95
Summary: The methodology for empirical mathematical modelling of the
relector response in the material under the test is described. In the
experiment the stadndard specimens were used under the conditions as
in-situ. The aim of the research is to increase the confidence level of the
nondestructive evaluation results.
For the qualitative and quantitative evaluation of the model and the set
criteria the procedure of the model validation is given.
Keywords: ultrasound, empirical mathematical model, reflector response, model validation
- Type of paper
: Paper in proceedings
Title: Quality assurance system in NDT testing
- Authors:
- IvkoviĆ, Zvonimir
- Krstelj, Vjera (24006)
- Editors
- Grubić, Kajo (14685)
Proceedings title: Zavarivanje i kontrola proizvoda iz polimera
Language: hrvatski
Place: Zagreb
Year: 1994
Pages: from 134 to 142
Meeting: Savjetovanje zavarivanje i kontrola proizvoda iz polimera
Held: from 11/03/94 to 11/04/94
Summary: A review of recommendendations and methods aimed to achiewe
more reliable data while performing NDT testing is given. A precise
planning of testing operations vithin varous stages of fabrication provides
a reliable monitoring of quality status of the product. Relliability and
consistency of NDT findings is provided by establiching the quality
assurance system in seting up and execution of testing.
Keywords: NDT testing, quality sustem, welded joints
- Type of paper
: Paper in proceedings
Title: Expert system for casting defects determination
- Authors:
- Žagar, Zdravko
- MomčinoviĆ, Davor
- Editors
- Krstelj, Vjera (24006)
Language: hrvatski
Place: Zagreb, Hratska
Year: 1995
Meeting: Međunarodno savjetovanje Ispitivanje u eksploataciji
Held: from 10/05/95 to 10/06/95
Summary: International casting defects classification, which is the
basis for the expert system, is described in the introduction. Basic
informations about expert systems arc given. A new expert system for
casting defects determination is developed and described in the paper.
Keywords: casting defects, classification, expert system, casting defects, determination
- Type of paper
: Paper in proceedings
Title: The application of ultrasonic diffraction to
intercrystalline crack evaluation
- Authors:
- Krstelj, Vjera (24006)
- Leljak, Irena (77860)
- Editors
- Krstelj, Vjera (24006)
Language: hrvatski
Year: 1995
Meeting: Međunarodno savjetovanje Ispitivanje u eksploataciji
Held: from 10/05/95 to 10/06/95
Summary: In this article the necessity of ultrasonic diffraction
technique introducement for intercrystalline crack detection and evaluation
is explained.
The verification of techniques is presented bz means of referent samples in
preparation for turbine components testing.
Keywords: ultrasonic diffraction, intercrystalline cracks, testing of turbine components
- Type of paper
: Paper in proceedings
Title: Capability estimation of testing system
- Authors:
- Krstelj, Vjera (24006)
- Markučič, Damir (175043)
- Editors
- Grubić, Kajo (14685)
- Andrić, Šimun (531)
Proceedings title: Oprema za zavarivanje i srodne tehnologije te njena primjena
Language: hrvatski
Place: Pula
Year: 1995
ISBN/ISSN: 953-96454-0-9
Pages: from 239 to 248
Meeting: Međunarodno savjetovanje Oprema za zavarianje i srodne tehnologije te njena primjena
Held: from 09/21/95 to 09/23/95
Summary: Considering the importance of the non-destructive testing,
knowledge of technical specifications and possibilities is not sufficient
for the efficient use of equipment in the process of testing. The elements
of the testing system are described, as well as their effects upon the
confidence to the registered data in the process of non destructive testing
are described. Also, available models for analysis and evaluation of
capability of the testing systems are presented. The most frequently used
quantitative parameters for capability estimation of a testing system in
the broadest term are explained.
Keywords: capability, sensitivity, repeatability, reproducibility, reliability, modelling, probability of detection, false call probability
- Type of paper
: Paper in proceedings
Title: Aplication of IR - theromgraphy in inspection of corrosion
defects in construction materials
- Authors:
- Žagar-Maričić, Alemka (55365)
- švaiĆ, SreĆko
- Editors
- Krstelj, Vjera (24006)
Language: hrvatski
Place: Zagreb
Year: 1995
Meeting: Međunarodno savjetovanje Ispitivanje u eksploataciji
Held: from 10/05/95 to 10/06/96
Summary: The authors discusses application of non destructive
testing in determining of the position and intensity of surface defects in
construction metal, under the protective coating, trough temperature field
analysis. Research was done by using thermography on corroded steel
specimen covered with a layer of protective coating. The measurements of
surface temperature fields, in a time domaine, point to satisfactori
results in regard to indication of certain defects under the coating
(corrosion defects etc.).
Keywords: non destructive testing, thermography, corrosion, defect, protective coating
- Type of paper
: Paper in proceedings
Title: Quality assurance of welding operations through
application of codes EN 719 and EN 729
- Authors:
- Kožuh, Zoran (186521)
- Kralj, Slobodan (23211)
- Editors
- Krstelj, Vjera (24006)
Language: hrvatski
Place: Zagreb
Year: 1995
Meeting: Međunarodno savjetovanje Ispitivanje u eksploataciji
Held: from 10/05/95 to 10/06/95
Summary: In this contribution a review of codes EN 719 and EN 729
(part 1 trough part 4) is given, together with indication of importance of
the mentioned codes in the quality assurance of welding operations. Also,
codes spedifying particular elements of quality requirements before the
implementation of these codes are indicated. Comparison towards the
existing ISO norms is given, particular attention being given to the
welding of metallic materials. However, majority of the requirements for
the quality assurance readily may be applied to other materials too. Beside
the survey of the mentioned codes, a comparison towards the existing
procedure of manufacturer certification and awarding the Certificate on
ability to perform the welding operations for the critical structures.
Keywords: quality assurance, EN codes, comparison, welding operaions
- Type of paper
: Paper in proceedings
Title: Thermographic testing of protective coatings
- Authors:
- Žagar-Maričić, Alemka (55365)
- švaiĆ, SreĆko
- Editors
- Krstelj, Vjera (24006)
Proceedings title: KBR u sustavu kvalitete
Language: hrvatski
Place: Zagreb, Hratska
Year: 1994
ISBN/ISSN: 953-96225-0-6
Pages: from 307 to 313
Meeting: Međunarodno savjetovanje KBR u sustavu kvalitete
Held: from 06/16/94 to 06/17/94
Summary: Thermal Non Destructive Testing means the determinationof
the position and intensity of defect in solid speciment or under the
coating based on the analysis of the temperature field on its surface. The
paper present investigations done on three metal speciments with the layer
of the surface protective coatinge, by means of thermography. The
speciments were pretreated and measurements of the temperature fields done
in the time domaine shows good results in qualitative location of
treatments.
Keywords: non destructive testing, thermography, protective coatings
- Type of paper
: Paper in proceedings
Title: Casting defects possibility of NDT aplication
- Authors:
- Žagar, Zdravko
- Editors
- Krstelj, Vjera (24006)
Proceedings title: KBR u sustavu kvalitete
Language: hrvatski
Place: Zagreb
Year: 1994
ISBN/ISSN: 953-96225-0-6
Pages: from 149 to 155
Meeting: Međunarodno savjetovanje KBR u sustavu kvalitete
Held: from 06/16/94 to 06/17/94
Summary: Theautor deals with different categories of casting
defects. Description of each category is given: metalic projections,
cavities, discontinuities, defective surface, incomplet casting, incorrect
dimensions or shape, inclusions or structural anomaties. The cuse, qays of
mentind and location are given for each of defects. Methods of control are
suggested, and the influence of the defects on the casting quality is
explained.
Keywords: quality, casting defects, classification, non-destructive testing
- Type of paper
: Paper in proceedings
Title: Protective organic coatings' adhesion research through
image analysis
- Authors:
- Žagar-Maričić, Alemka (55365)
- Kovačićek, Franjo (57020)
- Rede, Vera
- Editors
- Krstelj, Vjera (24006)
Language: hrvatski
Place: Zagreb
Year: 1995
Meeting: Međunarodno savjetovanje Ispitivanje u eksploataciji
Held: from 10/05/95 to 10/06/95
Summary: The quality of organic coatings protective ability, as well
as the quality of qeuipment protection, can be determined through adhesion
control standardized by "pull-off". The aplication of image analysis in
quantitative determination of adhesion bassed on "pull-off" test has been
given.
Keywords: corrosion protection, coating adhesion, "pull-off" test, image analysis
- Type of paper
: Paper in proceedings
Title: Non destructive testing in quality assurance of protective
coatings
- Authors:
- Žagar-Maričić, Alemka (55365)
- Editors
- Krstelj, Vjera (24006)
Proceedings title: KBR u sustavu kvalitete
Language: hrvatski
Place: Zagreb, Hratska
Year: 1994
ISBN/ISSN: 953-96225-0-6
Pages: from 99 to 106
Meeting: Međunarodno savjetovanje KBR u sustavu kvalitete
Held: from 06/16/94 to 06/17/94
Summary: The author gives a survey of NDT methods quality control of
protective coatings and their protective ability. The advantage of over
destructive testing are specially pointed out.
Keywords: non-destructive testing, protective coatings, corrosion control, NDT
- Type of paper
: Ph.D.
Title: Influence of Welding Parameters upon the resistance to
pitting corrosion of high alloyed steel
Faculty: strojarstva i brodogradnje u Zagrebu
Date of defense: 02/08/94
Language: hrvatski
Number of pages: 144
Summary: Research of influences of welding parameters upon the
resistanceto pitting corrosion in welded joints made on the high
alloyedsteel has been studied. In the first part of the work, basicfacts on
the corrosion resistant-high alloyed steel,peculiarities of their welding
and corrosion phenomena in theweldment area are given. Experimental work
has been performedapplying automated TIG, pulse MIG and PLASMA processes.
Weldingconditions werw varied for austenitics, superferritic and
duplex(austenitic-ferritic) base metal. Also, study of resistance topitting
corrosion related to the welded joint surface conditionis made. Methods of
measuring and analysis of welded jointfeatures such as roughness,
topography, local electricitypotential of the surface and surface oxides
are described.Measurements were made on the austenitic steel samples. It
isprovided that change of the welding conditions of the weldmentsurface may
influence both the caracter and intensity of thepitting corrosion in the
weldmwent area.
- Type of paper
: M.A.
Title: Mathematical modelling of ultrasonic beam as contribution
to the characterisation of testing system
Faculty: strojarstva i brodogradnje u Zagrebu
Author: MARKUČIĆ DAMIR
Date of defense: 06/19/95
Language: hrvatski
Number of pages: 108
Summary: The equivalent reflector size is the initial value for the
flaw evaluation upon which the inspected workpiece should or should not be
accepted, and/or the condition assessment should be proclaimed. The
reliable estimation of the equivalent reflector size depends on accurate
determination of acoustic energy distribution in inspected material.
The analysis and state of the art of conventional and theoretical models
are given in the first part of this work. The possibility of mathematical
modelling of ultrasonic beam in inspected material is given to aim at
characterisation of the ultrasonic testing system.
The ultrasonic pulse-echo method, piezoelectric method for ultrasonic wave
generation and two basic types of reflectors have been applied throughout
the experiment.
At the basis of the experiment results, with which the real terms and
affec-ting parameters are involved, the mathematical model of reflector
response has been designed according to the set criteria. The very good
model evaluation results have confirmed the proposed approach to problem
solving.
Keywords: ultrasonic, testing, beam, characterisation, reflector response, mathematical modelling
- Type of paper
: Mentorship
Title: Contribution to the Theory of Pulse MIG Welding
Faculty: strojarstva i brodogradnje u Zagrebu
Mentor: KRALJ SLOBODAN
Date of defense: 05/10/91
Number of pages: 144
Author: Grubić Kajo
Degree level: Ph.D.
- Type of paper
: Mentorship
Title: Influence of Welding Parametars upon the Resistance to
Pitting Corrosion of High Alloyed Steel
Faculty: strojarstva i brodogradnje u Zagrebu
Mentor: KRALJ SLOBODAN
Date of defense: 02/08/94
Number of pages: 126
Author: Juraga Dr.Sci. Ivan
Degree level: Ph.D.
- Type of paper
: Mentorship
Title: Mathematical modelling of ultrasonic beam as contribution
to the characterisation of testing system
Faculty: strojarstva i brodogradnje u Zagrebu
Mentor: KRSTELJ VJERA
Date of defense: 06/19/95
Number of pages: 108
Author: Markučič Dipl.inž. Damir
Degree level: M.A.
- Type of paper
: Data base
Title: Laser
- Authors:
- Kralj, Slobodan (23211)
- Misir, Tomislav (184256)
- Kožuh, Zoran (186521)
Institution administrator: Fakultet strojarstva i brodogradnje
HW platform: PC 386
Operating system: MS-Dos
Base format: DBF
Number of entries: 155
Keywords: laser,database
- Type of paper
: Survey/Study
Title:
- Authors:
- Krstelj, Vjera (24006)
- Filetin, Tomislav
- Alfirević, Izidor (187013)
- Markučič, Damir (175043)
Institution depot: Fakultet strojarstva i brodogradnje
Year: 1993
Number of pages: 32
Language: hrvatski
- Type of paper
: Survey/Study
Title:
- Authors:
- Krstelj, Vjera (24006)
Ordering party: Ministarstvo prostornog uređenja graditeljstva i stanovanja
Institution depot: Fakultet strojarstva i brodogradnje
Year: 1995
Language: hrvatski
