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Deformation behaviour of Titanium in torsion

Gurao, NP and Suwas, Satyam (2012) Deformation behaviour of Titanium in torsion. In: 16th International Conference on the Textures of Materials (ICOTOM 16), DEC 12-17, 2011, Indian Inst Technol Bombay, Mumbai, INDIA, pp. 826-829.

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Official URL: http://dx.doi.org/10.4028/www.scientific.net/MSF.7...

Abstract

The evolution of microstructure and texture in Hexagonal Close Pack commercially pure titanium has been studied in torsion in a strain rate regime of 0.001 to 1 s(-1). Free end torsion tests carried out on titanium rods indicated higher stress levels at higher strain rate but negligible change in the strain-hardening behaviour. There was a decrease in the intra-granular misorientation while a negligible change in the amount of contraction and extension twins was observed with increase in strain rate. The deformed samples showed a C-1 fibre (c-axis is first rotated 90 degrees in shear direction and then +30 degrees in shear plane direction) at all the strain rates. With the increase in strain rate, there was an increase in the intensity of the C-1 fibre and it became more heterogeneous with a strong {11(2)over-bar6}< 2(8)over-bar)63 > component. In the absence of extensive twinning, pyramidal < c+a > slip system is attributed for the observed deformation texture. The present investigation, therefore, substantiates the theoretical prediction of increase in strength of texture with strain rate in torsion.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to Trans Tech Publications Ltd.
Keywords: Torsion; Strain Rate; Texture
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 28 Feb 2013 08:35
Last Modified: 28 Feb 2013 08:35
URI: http://eprints.iisc.ac.in/id/eprint/45216

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