Thermo-mechanical and isothermal fatigue behavior of austenitic stainless steel AISI 316L

0449806 - ÚFM 2016 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Škorík, Viktor - Šulák, Ivo - Obrtlík, Karel - Polák, Jaroslav
Thermo-mechanical and isothermal fatigue behavior of austenitic stainless steel AISI 316L.
Metal 2015: 24th International Conference on Metallurgy and Materials. Ostrava: TANGER Ltd, 2015. ISBN 978-80-87294-58-1.
[METAL 2015 - International Conference on Metallurgy and Materials /24./. Brno (CZ), 03.06.2015-05.06.2015]
Grant CEP: GA MŠMT(CZ) EE2.3.30.0063; GA ČR(CZ) GA15-20991S; GA ČR(CZ) GA13-23652S
Institucionální podpora: RVO:68081723
Klíčová slova: Thermo-mechanical fatigue (TMF) * In-phase cycling (IP) * Isothermal fatigue (IF) * AISI 316L * Fatigue life
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

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 behavior of 316L steel both in TMF and IF regimes.
Trvalý link: http://hdl.handle.net/11104/0251589