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Deformation mechanisms during large strain deformation of high Mn TWIP steel

Kalsar, Rajib and Suwas, Satyam (2017) Deformation mechanisms during large strain deformation of high Mn TWIP steel. In: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 700 . pp. 209-219.

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Official URL: http://doi.org/10.1016/j.msea.2017.05.039

Abstract

The evolution of texture and microstructure has been studied up to very large strains (epsilon(t) approximate to 3.9) on a twinning induced plasticity (TWIP) steel. Different micromechanisms have been envisaged during different deformation regimes. At early stage of deformation, the mechanism is normal slip dominated, while deformation twining starts at similar to 20% rolling and increases up to 40% deformation level. Further deformation takes place by macroscopic shear banding (SBs). A Brass (Bs) type texture forms and strengthens throughout the deformation, which has been simulated by visco-plastic self consistent (VPSC) modelling. The results of VPSC simulations correlate the relative contributions of normal slip, Shockley partials and twin activities at different strain levels, which were observed by microstructural investigation. The Lankford parameter is estimated from texture, indicate that above 70% deformation level, the material develops very high in-plane anisotropy.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 16 Sep 2017 05:52
Last Modified: 16 Sep 2017 05:52
URI: http://eprints.iisc.ac.in/id/eprint/57833

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