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Projects / Programmes source: ARIS

Welding Improvement of Steel Niomol 490K for manufacturing of heavy loaded constructions

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Research activity

Code Science Field Subfield
2.04.02  Engineering sciences and technologies  Materials science and technology  Metallic materials 

Code Science Field
T130  Technological sciences  Production technology 
T150  Technological sciences  Material technology 
Keywords
brittle fracture, impact toughness, fracture toughness, M/A constituents, hydrogen content, could cracking, preheating
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (4)
no. Code Name and surname Research area Role Period No. of publications
1.  17161  Roman Celin  Materials science and technology  Researcher  1998 - 1999  285 
2.  05168  PhD Vladimir Gliha  Manufacturing technologies and systems  Researcher  1998 - 1999  338 
3.  12310  PhD Bogdan Pučko  Manufacturing technologies and systems  Researcher  1998 - 1999  50 
4.  09788  PhD Jelena Vojvodič Tuma  Civil engineering  Head  1997 - 1999  629 
Organisations (2)
no. Code Research organisation City Registration number No. of publications
1.  0206  Institute of Metals and Technology  Ljubljana  5051622000  6,011 
2.  0795  University ob Maribor, Faculty of mechanical engineering  Maribor  5089638010  23,917 
Abstract
Weld joints research works on HSLA steels have shown recently sensitivity against appearing of HAZ LBZs with low toughness and hydrogen could cracking. The cause for HAZ brittleness can be the precipitation of specific M/A phases on grain boundaries of the coarse grains as the consequence of subsequent additional weld passes heat treatment. Because the steel is Al and Nb micro-alloyed the grain growth can be only partly prevented. This can be not at the temperatures beyond 1300 degrease Centigrade. Due to steel very low carbon content the carbon equivalent is usually lower in the base metal than in weld metal. The consequence is higher sensitivity against could cracking in weld metal than in the HAZ. So, research is divided into two parts. Research on preventing the appearance of HAZ LBZs and research on preventing of occurrence of could cracking.
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