Deformation behaviour of commercially pure titanium at extreme strain rates

作者：Gurao N P; Kapoor Rajeev; Suwas Satyam^*

来源：Acta Materialia, 2011, 59(9): 3431-3446.

DOI：10.1016/j.actamat.2011.02.018

• Titanium
• Texture
• Twinning
• Electron backscatter diffraction

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.

• 出版日期2011-5