Analysis of Twinning Behavior of Ti-2V Alloy Compressed at High Strain Rate

Abstract:

The spilt Hopkinson pressure bar was employed to study dynamic compression mechanical response of Ti-2V alloy. The dynamic compression experiment was carried at a strain rate of 3000s^-1. The microstructure of deformed specimen with ε=0.05, 0.18, 0.26 was observed by optical microscope. Electron Back-Scattered Diffraction (EBSD) technique was applied to confirm the types of twinning. Through analyzing mechanical response and microstructure evolution rule, the effect of element vanadium and deformation degree on dynamic mechanical properties and twinning deformation behavior was revealed. The results indicate that twinning is the prime dynamic deformation mechanism in Ti-2V alloy and the twinning fraction is increasingly raised during the deformation process. The twinning types, confirmed by Orientation Imaging Microscopy software, are namely {102}, {112} and {111} twinning. And the number of {111} twinning is far less than the other two types of twinning.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 231-235
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.231
• Online since: June 2017
• Authors: Qiao Chu Wang, Rui Liu*, Wen Jun Ye, Yang Yu, Xiao Yun Song, Song Xiao Hui
• Keywords: Dynamic Mechanical Response, Split Hopkinson Pressure Bar, Ti-2V, Twinning Types

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