Abstract In situ Ti-6Al-4V/TiB composites with different contents of TiB were prepared by SPS. The flow behavior of the composites deformed at temperatures of 900~1200 °C and strain rates of 0.001 to 10 s−1 was studied. The constitutive equations and processing maps were established. Results show that the composites have fine microstructures, and nano-sized TiB whiskers distribute homogeneously in the α+β titanium matrix. The activation energy of the composites is low due to the fine microstructures, resulting in a good workability. The processing maps suggest that the instable deformation occurs at low temperatures and high strain rates. The flow localization band of Ti matrix, cracking and debonding of TiB whiskers are the reasons for the instable deformation. Dynamic recrystallization has been found in composites deformed at low strain rates, accounting for the stable deformation.

中文翻译：

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纳米TiB增强Ti-6Al-4V金属基复合材料的热变形行为

摘要 采用SPS原位制备了不同TiB含量的Ti-6Al-4V/TiB复合材料。研究了复合材料在 900~1200 °C 温度和 0.001 至 10 s-1 应变速率下变形的流动行为。建立了本构方程和加工图。结果表明，复合材料具有精细的微观结构，纳米尺寸的 TiB 晶须在 α+β 钛基体中均匀分布。复合材料的微观结构精细，活化能低，可加工性好。加工图表明不稳定变形发生在低温和高应变率下。Ti基体的流动局部化带、TiB晶须的开裂和脱粘是不稳定变形的原因。在低应变率下变形的复合材料中发现了动态再结晶，