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Projects / Programmes source: ARIS

Analyse of reasons for formation of failures on generator caps in steam plants, and making an more resistant alloyed

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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
T450  Technological sciences  Metal technology, metallurgy, metal products 
Keywords
steam plants, machine equipment of generator’s block, stress corrosion cracking, corrosion fatigue, microstructure investigations, crack detection, crack propagation rate, life time
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 (9)
no. Code Name and surname Research area Role Period No. of publications
1.  17567  Ines Dukić  Materials science and technology  Researcher  1999 - 2000  0 
2.  14524  MSc Predrag Dukić  Energy engineering  Researcher  1998 - 2000  0 
3.  06554  PhD Branislav Glogovac  Energy engineering  Researcher  1998 - 2000  0 
4.  04982  Dimitrij Kmetič  Materials science and technology  Researcher  1998 - 2000  0 
5.  02909  Danijel Kokalj  Energy engineering  Researcher  1998 - 2000  0 
6.  07642  PhD Vojteh Leskovšek  Materials science and technology  Researcher  1998 - 2000  0 
7.  00747  PhD Vasilij Prešern  Materials science and technology  Researcher  1998 - 2000  0 
8.  05438  PhD Matjaž Torkar  Materials science and technology  Researcher  1998 - 2000  0 
9.  05770  PhD Leopold Vehovar  Materials science and technology  Head  1998 - 2000  0 
Organisations (2)
no. Code Research organisation City Registration number No. of publications
1.  0203  The "Milan Vidmar" Elec" Electric Power Research Institute  Ljubljana  5056462000  0 
2.  0206  Institute of Metals and Technology  Ljubljana  5051622000  0 
Abstract
During the exploatation of generator, the generator cap play an inportant role in generator’s block. It is high loaded with static or cyclic strengths. As a concequence of all this, fatigue cracks can occur. Because the generator coil is cooling with air or hydrogen gas, the humidity has an strong effect on development of different mode of stress corrosion cracks. Some analyses have shown that more dangerous corrosion fatigue can turn up. However, at specific type of generators, coils are cooling even by hydrogen, that means hydrogen embrittlement of metals appear, and due to action of different mechanisms, nucleation and propagation of cracks can arise. It has an inportant influence on residual life time of components, frequent control and refit. Due to mentioned degradation processes it is necessary to search real reasons for different failures of that essential part of industrial equipment. On this base we would like to capture this type of steel, which shows improved resistance to environment (corrosion, hydrogen embrittlement, fatigue) longer life time and better operation safety.
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