Abstract As a typical commercial superconducting alloy, Ti-37 at.%Nb alloy is put into engineering application after it experiences plastic deformation at high temperatures. In order to interpret flow behaviour of Ti-37 at.%Nb alloy at elevated temperatures, the constitutive equation of the alloy is constructed based on compressive test at the temperatures (700–1000 °C) and the strain rates (0.0005–0.5s−1), where strain compensation is taken into consideration. According to the corresponding constitutive equation, flow stress of Ti-37 at.%Nb alloy is accurately predicted, which is further validated by the experimental data. Simultaneously, the involved microstructural evolution of Ti-37 at.%Nb alloy is characterized in order to further reveal thermal-mechanical behaviour and plastic deformation mechanism of the alloy. Discontinuous dynamic recystallization (DDRX) and continuous dynamic recystallization (CDRX) are found at the same time during hot plastic deformation of Ti-37at.%Nb alloy. Plastic deformation and dynamic recrystallization have a comprehensive influence on textures of Ti-37 at.%Nb alloy. {100} , {100} , {111} and {111} textures are observed in all the deformed Ti-37 at.%Nb samples, where Ti-37 at.%Nb specimens deformed at 700, 900 and 1000 °C exhibit the strongest {100} texture, whereas Ti-37 at.%Nb specimen deformed at 800 °C shows the strongest {111} texture.

中文翻译：

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Ti-37 at.%Nb合金热压缩变形的力学行为和显微组织演变

摘要 Ti-37 at.%Nb合金是一种典型的商用超导合金，经过高温塑性变形后进入工程应用。为了解释 Ti-37 at.%Nb 合金在高温下的流动行为，基于在温度 (700–1000 °C) 和应变速率 (0.0005–0.5s) 下的压缩试验构建了合金的本构方程-1)，其中考虑了应变补偿。根据相应的本构方程，准确预测了Ti-37 at.%Nb合金的流动应力，并得到了实验数据的进一步验证。同时，表征了 Ti-37 at.%Nb 合金的显微组织演变，以进一步揭示合金的热机械行为和塑性变形机制。Ti-37at.%Nb合金在热塑性变形过程中同时发现了不连续动态再结晶(DDRX)和连续动态再结晶(CDRX)。塑性变形和动态再结晶对Ti-37 at.%Nb合金的织构有综合影响。在所有变形的 Ti-37 at.%Nb 样品中观察到 {100} 、{100} 、{111} 和 {111} 织构，其中 Ti-37 at.%Nb 样品在 700、900 和 1000 °C 下变形最强的 {100} 织构，而在 800 °C 变形的 Ti-37 at.%Nb 试样显示最强的 {111} 织构。