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THERMO-MECHANICAL AND ISOTHERMAL FATIGUE BEHAVIOR OF AUSTENITIC STAINLESS STEEL AISI 316L

1,2 ŠKORÍK Viktor
Co-authors:
1 ŠULÁK Ivo 1 OBRTLÍK Karel 1,2 POLÁK Jaroslav
Institutions:
1 Institute of Physics of Materials, Academy of Science of the Czech Republic, Brno, Czech Republic, EU
2 CEITEC, Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Brno, Czech Republic, EU
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
851-856
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
431 views / 199 downloads
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Abstract

Many structural components of nuclear power plant systems are made of austenitic stainless steels. These structures undergo degradation by thermo-mechanical fatigue (TMF) caused by simultaneous cyclic straining and temperature cycling, particularly during start-up, shut-down and transient operations. The present work reports the cyclic deformation behavior and fatigue damage of austenitic stainless steel AISI 316L during TMF and isothermal fatigue (IF) testing in air. Total strain controlled in-phase TMF loading in the temperature range 200 - 600 °C and isothermal fatigue (IF) at 600 °C were performed. Hardening/softening curves, cyclic stress-strain response and fatigue life diagrams were obtained both for TMF and IF tests. Fatigue damage was documented using surface relief and fracture surface observations. Mean stress evolution and fatigue degradation data are employed to discuss the fatigue behaviour of 316L steel both in TMF and IF regimes.

Keywords: Thermo-mechanical fatigue (TMF), Isothermal fatigue (IF), In-phase cycling (IP), AISI 316L, Fatigue life

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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