In-situ study of tensile deformation behaviour of medium Mn TWIP/TRIP steel using synchrotron radiation

Kalsar, R and Sanamar, S and Schell, N and Brokmeier, H-G and Saha, R and Ghosh, P and Suwas, S (2022) In-situ study of tensile deformation behaviour of medium Mn TWIP/TRIP steel using synchrotron radiation. In: Materials Science and Engineering A, 857 .

PDF mat_sci_eng_857_2022.pdf Restricted to Registered users only Download (14MB) | Request a copy

Abstract

This investigation proposes a pathway for generating optimum microstructure for a medium Mn containing twinning-induced plasticity/transformation-induced plasticity (TWIP/TRIP) steels. The steel contains a two-phase microstructure consisting of austenite and ferrite phase arranged in a lamellar fashion. The microstructure was developed following a specially designed thermo-mechanical processing schedule that involved quenching and partitioning. The feedback for the design of thermo-mechanical processing was obtained by carrying out in-situ deformation in high energy synchrotron radiation under tensile loading. Diffraction patterns were analysed for estimating the retained austenite phase fraction and other aspects of microstructural evolution. X-ray line profile analysis was performed to determine crystallite size, dislocation density, and twin density at individual stages of deformation. In the early stages, deformation occurs by dislocation slip in both phases, while in the later stages, deformation in the austenite phase occurs via twinning and martensitic transformation, and in the ferrite phase by dislocation slip. Strain hardening behaviour has been analysed and correlated with microstructural parameters.

Item Type:	Journal Article
Publication:	Materials Science and Engineering A
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd.
Keywords:	Austenite; Austenitic transformations; Crystallite size; Deformation; Ferrite; Martensite; Martensitic transformations; Microstructure; Plasticity; Strain hardening; Synchrotrons; Tensile testing; Twinning, Austenite phase; Dislocation slip; Ferrite phase; In-Situ Study; In-situ tensile test; Medium mn twinning-induced plasticity/transformation-induced plasticity steel; Strain induced martensite transformation; Thermomechanical processing; Transformation induced plasticity steel; Twinning-induced plasticities, Synchrotron radiation
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	19 Oct 2022 08:43
Last Modified:	19 Oct 2022 08:43
URI:	https://eprints.iisc.ac.in/id/eprint/77429

Actions (login required)

View Item