Hydrogen sintering and phase transformation (HSPT), a powder metallurgy process, has been previously shown to produce desirable microstructures in Ti-6Al-4V components with corresponding excellent static and fatigue tensile properties. In the current study, three microstructures produced by HSPT and one produced by traditional wrought processing were tested under compression at strain rates of 0.001, 0.1, and > 1000 s⁻¹. The wrought condition exhibited the best toughness at 0.001 s⁻¹, but had the worst performance at both 0.1 and > 1000 s⁻¹ strain rates. The HSPT condition with a globularized microstructure performed the best at 1000 s⁻¹. From microstructural analyses, it is shown that the wrought condition had strong macroscopic texture consistent with hot rolling above the β-transus temperature. It is proposed that this macrotexture made the wrought material susceptible to relatively early-onset shear banding at all but the lowest strain rate. Being a powder metallurgical process with no mechanical working, this macrotexture does not form during the HSPT process.

氢烧结和相变（HSPT），一种粉末冶金工艺，先前已被证明可以在Ti-6Al-4V部件中产生理想的微观结构，并具有出色的静态和疲劳拉伸性能。在当前的研究中，在0.001、0.1和> 1000 s ^-1的应变速率下，对HSPT产生的三个微结构和传统锻造工艺产生的三个微结构进行了测试。变形条件在0.001 s ^-1时表现出最佳的韧性，但在0.1和> 1000 s ^-1应变率下均表现最差。具有球状微结构的HSPT条件在1000 s ^-1时表现最佳。从微观结构分析表明，变形条件具有强的宏观织构，与高于β-转变温度的热轧相一致。有人提出，这种宏观纹理使锻造材料除了最低的应变速率外，都易受相对较早发生的剪切带的影响。作为一种无需机械加工的粉末冶金工艺，这种宏观纹理不会在HSPT工艺过程中形成。