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Projects / Programmes source: ARIS

Investigation of structural brittleness in two phase stainless casting alloys

Research activity

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

Code Science Field
T150  Technological sciences  Material technology 
Keywords
two-phase stainless steel cast alloy, spinodal decomposition, notch toughness, hardness, delta ferrite micromorphology
Evaluation (rules)
source: COBISS
Researchers (11)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  08236  Boris Arzenšek  Materials science and technology  Researcher  2002 - 2004  225 
2.  00741  Bojan Breskvar  Materials science and technology  Researcher  2002 - 2004  160 
3.  17161  Roman Celin  Materials science and technology  Researcher  2002 - 2004  285 
4.  04982  Dimitrij Kmetič  Materials science and technology  Researcher  2002 - 2004  421 
5.  11624  PhD Borut Kosec  Materials science and technology  Researcher  2002 - 2004  976 
6.  00050  PhD Ladislav Kosec  Materials science and technology  Researcher  2002 - 2004  851 
7.  21523  PhD Iztok Naglič  Materials science and technology  Researcher  2002 - 2004  178 
8.  21315  PhD Polona Škraba  Physics  Researcher  2002 - 2004  45 
9.  13026  PhD Roman Šturm  Manufacturing technologies and systems  Researcher  2002 - 2004  328 
10.  08195  PhD Borivoj Šuštaršič  Materials science and technology  Head  2002 - 2004  412 
11.  09788  PhD Jelena Vojvodič Tuma  Civil engineering  Researcher  2002 - 2004  629 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0206  Institute of Metals and Technology  Ljubljana  5051622000  5,977 
2.  1555  University of Ljubljana, Faculty of Natural Sciences and Engeneering  Ljubljana  1627074  19,839 
Abstract
Delta ferrite is part of the microstructure of two-phases stainless Fe-Cr-Ni cast alloys and austenitic stainless 18/8 welds. By a temperature below appr. 500 grades C coherent intermetallic particles precipitate from the solid solution in deltha ferrite, while below appr. 400 grades C its spinodal decomposition occurs. Both reactions produce internal elastic stresses, increase the hardness and strongly decrease the notch toughness of the cast alloy. The goal of this investigation is to establish the connection between the content and the distribution of delta ferrite in the cast alloy, to determine the kinetics of the spinodal decomposition at appr. 300 grades C and to determine its effect on notch toughness.
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