研究四种α+β钛合金在3000s-1应变率下的动态力学性能,并对比分析四种材料的绝热剪切敏感性、绝热剪切带形貌及高应变率下的吸收能.结果表明:四种钛合金在此应变率下均发生了局域化变形,TC17和TC6钛合金的绝热剪切敏感性比TC4和TC11钛合金小.TC17钛合金的晶粒均匀细小且初生α相的等轴化程度很好,因此其在动态加载过程的协调变形能力最强,在此应变率下未萌生绝热剪切带,且动态应变、流变应力和吸收能均较大,抗动态冲击的能力最强.TC6钛合金的绝热剪切带刚刚萌生,并未扩展为裂纹,抗动态冲击的能力较强.TC11和TC4钛合金在此应变率下绝热剪切带已扩展为裂纹,发生了明显的绝热剪切失效,且动态应变和吸收能较小,抗动态冲击的能力较差.
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