LCF behaviour of ultrafine grained 301LN stainless steel

0433871 - ÚFM 2015 RIV NL eng C - Conference Paper (international conference)
Chlupová, Alice - Man, Jiří - Kuběna, Ivo - Polák, Jaroslav - Karjalainen, L. P.
LCF behaviour of ultrafine grained 301LN stainless steel.
XVII International Colloquium on Mechanical Fatigue of Metals (ICMFM17). Amsterdam: Elsevier, 2014 - (Gulagliano, M.; Vergani, L.), s. 147-150. Procedia Engineering, 74. ISSN 1877-7058.
[ICMFM 2014 International Colloquium on Mechanical Fatigue of Metals /17./. Verbania (IT), 25.06.2014-27.06.2014]
R&D Projects: GA MŠMT(CZ) ED1.1.00/02.0068; GA ČR GA13-32665S
Institutional support: RVO:68081723
Keywords : low cycle fatigue * austenitic stainless 301LN steel * ultrafine-grained (UFG) microstructure * reversion annealing
Subject RIV: JL - Materials Fatigue, Friction Mechanics

Cyclic strain behaviour of metastable austenitic 301LN steel with different grain sizes – coarse (14 µm) and ultrafine (1.4 µm) grained – produced by the special thermo-mechanical treatment based on the martensite-to-austenite reversion was investigated. Low-cycle fatigue (LCF) tests were conducted on flat specimens at room temperature in fully push-pull mode under strain control with constant strain rate of 2×10–3 s–1 and constant total strain amplitude ranging from 0.4% to 0.9%. LCF behaviour was characterised by cyclic hardening/softening curves and fatigue life curves. After completion of fatigue tests surface fatigue damage was studied using scanning electron microscopy (SEM). Ferritoscope was adopted to reveal the destabilization of austenitic structure and evaluate the extent of deformation induced martensitic transformation.
Permanent Link: http://hdl.handle.net/11104/0238508