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Influence of the mode of deformation on recrystallisation behaviour of titanium through experiments, mean field theory and phase field model

Athreya, CN and Mukilventhan, A and Suwas, Satyam and Vedantam, Srikanth and Sarma, VSubramanya (2018) Influence of the mode of deformation on recrystallisation behaviour of titanium through experiments, mean field theory and phase field model. In: MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 26 (3).

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Official URL: http://dx.doi.org/ 10.1088/1361-651X/aaa6a4

Abstract

The influence of the mode of deformation on recrystallisation behaviour of Ti was studied by experiments and modelling. Ti samples were deformed through torsion and rolling to the same equivalent strain of 0.5. The deformed samples were annealed at different temperatures for different time durations and the recrystallisation kinetics were compared. Recrystallisation is found to be faster in the rolled samples compared to the torsion deformed samples. This is attributed to the differences in stored energy and number of nuclei per unit area in the two modes of deformation. Considering decay in stored energy during recrystallisation, the grain boundary mobility was estimated through a mean field model. The activation energy for recrystallisation obtained from experiments matched with the activation energy for grain boundary migration obtained from mobility calculation. A multi-phase field model (with mobility estimated from the mean field model as a constitutive input) was used to simulate the kinetics, microstructure and texture evolution. The recrystallisation kinetics and grain size distributions obtained from experiments matched reasonably well with the phase field simulations. The recrystallisation texture predicted through phase field simulations compares well with experiments though few additional texture components are present in simulations. This is attributed to the anisotropy in grain boundary mobility, which is not accounted for in the present study.

Item Type: Journal Article
Additional Information: Copy right for the article belong to IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 02 Mar 2018 14:50
Last Modified: 21 Feb 2019 10:46
URI: http://eprints.iisc.ac.in/id/eprint/59068

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