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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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 |
|---|---|
| Series.: | Materials Science Forum |
| Publisher: | Trans Tech Publications Ltd |
| 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 |
| 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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