The W–Al₂O₃ alloy rods were successfully fabricated by the powder metallurgy process and hot swaging. Subsequently, the high-temperature tensile tests were conducted to characterize the mechanical properties of the W–Al₂O₃ alloy. At 800 °C, the ultimate tensile strength of W-0.25 wt% Al₂O₃ alloy is 611.1 MPa, which is 18% higher than that of pure W. After tension, the microstructure evolution was evaluated using metallographic microscope and transmission electron microscopy. For the pure W undergoing deformation at 1000 °C, dynamic recrystallization occurs, leading to the sharp decrease of the strength. However, the microstructure of the W-0.25 wt% Al₂O₃ alloy contains a large number of sub-grain and low-angle grain boundaries, which does not significantly change in the temperature range of 800–1200 ^oC, and the work hardening plays a leading role during the high-temperature deformation process. Due to high hardness, the dispersed Al₂O₃ particles effectively prevent the dislocation movement, displaying a significant strengthening effect.

W-Al ₂ O ₃合金棒通过粉末冶金工艺和热锻造成功制造。随后，进行高温拉伸试验以表征W-Al ₂ O ₃合金的力学性能。在800 ℃时，W-0.25 wt% Al ₂ O ₃合金的极限抗拉强度为611.1 MPa，比纯W高18%。拉伸后，采用金相显微镜和透射电镜评价组织演变. 纯W在1000℃发生变形，发生动态再结晶，导致强度急剧下降。然而，W-0.25 wt% Al ₂ O的微观结构₃合金含有大量亚晶和小角度晶界，在800~1200 ^o C温度范围内变化不明显，在高温变形过程中加工硬化起主导作用。由于硬度高，分散的Al ₂ O ₃颗粒有效地阻止了位错运动，表现出显着的强化效果。