Abstract A burn-resistant Ti-25V-15Cr-2Al-0.2C alloy was fabricated by hot isostatic pressing (HIPping) from the prealloyed powders under a pressure of 200 MPa and at 900, 950, and 980 °C for 2 h. Microstructure was examined using scanning electron microscope (SEM) equipped with electron backscatter diffraction (EBSD) detector and transmission electron microscope (TEM). Tensile tests were to evaluate mechanical behavior of the HIPped samples. The results show that HIPping temperature clearly affects the microstructure of the HIPped samples, thus the mechanical properties. For example, lower HIPping temperature produced more porosities at triple-junctions and more large grains resulted from the original powders, thus lower ductility was observed in the sample HIPped at 900 °C. However, the sample HIPped at 980 °C generates the best tensile properties with over 20% ductility, which is even better than those of as-extruded Ti-25V-15Cr-2Al-0.2C alloy.

中文翻译：

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热等静压法制备难燃钛合金的显微组织和力学性能研究

摘要 将预合金粉末在 200 MPa 的压力下，在 900、950 和 980 °C 下加热 2 h，通过热等静压 (HIPping) 方法制备了一种耐燃 Ti-25V-15Cr-2Al-0.2C 合金。使用配备电子背散射衍射 (EBSD) 检测器和透射电子显微镜 (TEM) 的扫描电子显微镜 (SEM) 检查微观结构。拉伸测试是为了评估 HIPped 样品的机械性能。结果表明，HIPping 温度明显影响 HIPped 样品的微观结构，从而影响机械性能。例如，较低的 HIPping 温度会在三结处产生更多的孔隙，原始粉末产生更多的大晶粒，因此在 900 °C 下 HIP 的样品中观察到较低的延展性。然而，