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Grain Boundary Engineering of Medium Mn TWIP Steels: A Novel Method to Enhance the Mechanical Properties

Kalsar, Rajib and Kumar, Lailesh and Suwas, Satyam (2018) Grain Boundary Engineering of Medium Mn TWIP Steels: A Novel Method to Enhance the Mechanical Properties. In: ISIJ INTERNATIONAL, 58 (7). pp. 1324-1331.

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Official URL: http://dx.doi.org/10.2355/isijinternational.ISIJIN...

Abstract

The grain boundary engineering (GBE) approach was employed on a medium manganese (Mn) based twinning induced plasticity (TWIP) steel to improve its mechanical properties. Two specially designed thermo-mechanical processing (TMP) routes, one involving unidirectional rolling (UDR) and the other one employing multi-step cross rolling (MSCR), with intermediate short term annealing treatment have been used. The annealing temperatures are chosen considering recrystallization and grain growth. Of the two routes, the one involving MSCR, has shown a higher fraction of special or coincident lattice site (CSL) grain boundaries. A detailed grain boundary microstructural analysis has been carried out by electron backscatter diffraction (EBSD) for differently processed samples. A significant improvement in ductility is observed in MSCR processed samples due to increase of CSL boundary fraction.

Item Type: Journal Article
Additional Information: Copy right for this article belong to IRON STEEL INST JAPAN KEIDANREN KAIKAN, TEKKO KAIKAN-5F, 3-2-10, NIHONBASHI-KAYABACHO, TOKYO, CHUO-KU 103-0025, JAPAN
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 27 Aug 2018 14:57
Last Modified: 27 Aug 2018 14:57
URI: http://eprints.iisc.ac.in/id/eprint/60496

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