Deformation behaviour of TRIP steel monitoring by in-situ neutrondiffraction

0358981 - FZÚ 2012 RIV CH eng J - Journal Article
Zrnik, J. - Muránsky, O. - Šittner, Petr - Oliver, E.C.
Deformation behaviour of TRIP steel monitoring by in-situ neutrondiffraction.
Key Engineering Materials. Roč. 465, č. 1 (2011), s. 390-394. ISSN 1662-9795
R&D Projects: GA ČR GAP107/10/0824; GA ČR GAP108/10/1296; GA AV ČR(CZ) IAA200100627
Institutional research plan: CEZ:AV0Z10100520
Keywords : TRIP steel * austenite conditioning * retained austenite * neutron diffraction
Subject RIV: BM - Solid Matter Physics ; Magnetism
http://www.scientific.net/KEM

The paper presents results of in-situ neutron diffraction experiments aimed on monitoring the phase evolution and load distribution in TRIP steel when subjected to tensile loading. Tensile deformation behaviour of TRIP steel with different initial microstructures showed that the applied tensile load is redistributed at the yield point and the harder retained austenite (Feγ) bears larger load then ferrite (Feα) matrix. After load partioning is finished, macroscopic yielding comes through simultaneous activity of the martensite transformation (in the austenite) and plastic deformation process in ferrite. The steel with higher volume fraction of retained austenite and less stronger ferrite appears to be a better TRIP steel having efficient structure for better plasticity purpose.
Permanent Link: http://hdl.handle.net/11104/0196868