The microstructure and mechanical properties of tungsten (W) materials have strong influences on their thermal shock performance. In this work, a W-Y₂O₃ (0.14 wt% Y) alloy with bimodal grain structure was fabricated by swaging plus high energy rate forging of the hydrogen sintered compact. In tensile tests, the W alloy exhibits a high yield strength (σ_Y = 1400 MPa) and a plastic strain ε = 5.5% at room temperature, and extensive tensile strains exceeding 20% at 100–300 °C. Its thermal shock performance was assessed by applying cyclic edge localized mode-like long heat pulse for 100 times at room temperature with an electron beam equipment. Within the range 0.44–1.1 GW m⁻², the specimens are free of cracking, and the surface modifications change from shear step-like bulges to recrystallization with increasing absorption power density.

钨 (W) 材料的微观结构和机械性能对其热震性能有很大影响。在这项工作中，具有双峰晶粒结构的 WY ₂ O ₃ (0.14 wt% Y) 合金通过型锻加氢烧结体的高能率锻造制造。 在拉伸试验中，W 合金在室温下表现出高屈服强度 ( σ _Y  = 1400 MPa) 和塑性应变ε = 5.5%，在 100–300 °C 时拉伸应变超过 20%。通过在室温下用电子束设备施加循环边缘局域化模式类长热脉冲 100 次来评估其热冲击性能。^{在 0.44–1.1 GW m −2}范围内，样品没有开裂，并且随着吸收功率密度的增加，表面改性从剪切阶梯状凸起变为再结晶。