Deformation behaviour of commercially pure titanium at extreme strain rates

被引:181
作者
Gurao, N. P. [1 ]
Kapoor, Rajeev [2 ]
Suwas, Satyam [1 ]
机构
[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India
[2] Bhabha Atom Res Ctr, Mat Grp, Bombay 400085, Maharashtra, India
关键词
Titanium; Texture; Twinning; Electron backscatter diffraction; ALPHA-TITANIUM; CRYSTALLOGRAPHIC TEXTURE; MECHANICAL RESPONSE; CONSTITUTIVE LAW; ZIRCONIUM; EVOLUTION; SLIP; DIFFRACTION; SIMULATION;
D O I
10.1016/j.actamat.2011.02.018
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The evolution of microstructure and texture during room temperature compression of commercially pure Ti with four different initial orientations were studied under quasi-static and dynamic loading conditions. At a low strain rate (epsilon)over dot = 3 x 10(-4) s(-1) the different initial textures yielded the same end texture, despite different microstructural evolution in terms of twin boundaries. High strain rate deformation at (epsilon)over dot = 1.5 x 10(3) s(-1) was characterized by extensive twinning and evolution of a texture that was similar to that at low strain rate with minor differences. However, there was a significant difference in the strength of the texture for different orientations that was absent for low strain rate deformed samples at high strain rate. A viscoplastic self-consistent model with a secant approach was used to corroborate the experimental results by simulation. (C) 2011 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.
引用
收藏
页码:3431 / 3446
页数:16
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