Original title: LCF behaviour of 301LN steel: coarse-grained vs. UFG-bimodal structure
Authors: Man, Jiří ; Chlupová, Alice ; Kuběna, Ivo ; Kruml, Tomáš ; Man, O. ; Järvenpää, A. ; Karjalainen, L. P. ; Polák, Jaroslav
Document type: Papers
Conference/Event: LCF8 Eighth International Conference on Low Cycle Fatigue /8./, Dresden (DE), 20170627
Year: 2017
Language: eng
Abstract: Low-cycle fatigue (LCF) behaviour of metastable austenitic 301LN steel with different grain sizes – coarse-grained (14 µm) and UFG (1.4 µm) with a grain bimodality – produced by reversion annealing (RA) was investigated. Symmetrical push-pull LCF tests were conducted on flat sheet specimens at room temperature with constant strain rate of 2×10–3 s–1 and constant total strain amplitude ranging from 0.4% to 0.8%. After completion of fatigue tests a ferritescope was adopted for quantitative assessment of volume fraction of deformation induced martensite (DIM). Microstructural changes, distribution and morphology of DIM in the volume of material were characterized at different scales by colour etching, TEM and EBSD techniques. Experimental data on microstructural changes are confronted with the stress-strain response and with the chemical heterogeneity present in the material.
Keywords: 301LN austenitic stainless steel; deformation induced martensite; low cycle fatigue; reversion annealing; UFG microstructure
Project no.: GA13-32665S (CEP)
Funding provider: GA ČR
Host item entry: LCF8 Eighth International Conference on Low Cycle Fatigue , ISBN 978-3-9814516-5-8

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0278867

Permalink: http://www.nusl.cz/ntk/nusl-373444


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