This study examined the dynamic compressive properties and adiabatic shear behavior of β-type Ti–10Mo, Ti–15Mo, and Ti–22.5Mo alloys whose deformation modes are stress-induced α''-martensitic transformation combined with {332}<113> twinning, {332}<113> twinning, and dislocation slip under quasi-static loading, respectively. Based on the characterization of deformation microstructures, the deformation modes did not undergo significant change regardless of quasi-static and dynamic conditions. Their yield strength increased remarkably when the strain rate rose from 10⁻³ s⁻¹ to 10³ s⁻¹, thus exhibiting the strain rate strengthening effect. The impact absorbed energy showed an increasing trend with a rise in strain rate, and the highest value (319.2 J/cm³) was observed in the Ti–15Mo alloy at a strain rate of 3956 s⁻¹. The {332}<113> twinning deformation led to a high capacity for strain hardening, which delayed the formation of adiabatic shear bands, comprising the ultra-fine β-matrix and nano-scale ω-phase. Moreover, the deformed twins provided a tortuous and bifurcated path to enhance the propagation resistance of adiabatic shear bands, thereby further consuming the impact energy.

本研究考察了变形模式为应力诱导的 α''-马氏体相变结合 {332}<113> 的 β 型 Ti-10Mo、Ti-15Mo 和 Ti-22.5Mo 合金的动态压缩性能和绝热剪切行为孪晶、{332}<113>孪晶和准静态载荷下的位错滑移。基于变形微观结构的表征，无论准静态和动态条件如何，变形模式都没有发生显着变化。当应变速率从 10 ^-3 s ^-1增加到 10 ³ s ^{-1时，它们的屈服强度显着增加}，从而表现出应变率强化效应。冲击吸收功随应变速率的增加呈增加趋势，最高值（319.2 J/cm ³）出现在Ti-15Mo合金中，应变速率为3956 s ^-1。{332}<113>孪晶变形导致高应变硬化能力，从而延迟了绝热剪切带的形成，包括超细β-基体和纳米级ω-相。此外，变形双胞胎提供了一条曲折的分叉路径，以增强绝热剪切带的传播阻力，从而进一步消耗冲击能量。