Analysis of Twinning Behavior of Ti-2V Alloy Compressed at High Strain Rate
Analysis of Twinning Behavior of Ti-2V Alloy Compressed at High Strain Rate
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DOI：
10.4028/www.scientific.net/msf.898.231
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Qiaoyan Wang;Rui Liu;W. Ye;Yang Yu;X. Song;S. Hui
中科院分区：
文献类型：
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作者：
Qiaoyan Wang;Rui Liu;W. Ye;Yang Yu;X. Song;S. Hui
采用分离式霍普金森压杆研究了Ti-2V合金的动态压缩力学响应。在应变速率为3000s-1的条件下进行动态压缩实验。用光学显微镜观察ε=0.05、0.18、0.26变形试样的显微组织。利用电子背散射衍射（EBSD）技术确定了孪晶的类型。通过分析合金的力学响应和组织演化规律，揭示了钒元素和变形程度对合金动态力学性能和孪晶变形行为的影响。结果表明：在Ti-2V合金的动态变形过程中，孪晶是主要的变形机制，且在变形过程中孪晶含量不断提高；取向成像显微镜软件确认的孪生类型为{102}、{112}和{111}孪生。而{111}双胞胎的数量远远少于其他两种类型的双胞胎。
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.