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对粉未冶金的９３ＷＮｉＦｅ进行了应变率为１０－４～１０３ｓ－１的动态拉伸实验．结果表明，具有两相组织的钨合金具有明显的高应变率导致塑性降低现象，其微观机制是随着应变率的增加，体心立方结构的钨颗粒变形逐渐被抑制，甚至不变形；面心立方结构的基体变形变化不大．断裂模式则由钨颗粒与粘接相基体界面脱开的韧性断裂向钨颗粒解理的脆性断裂转变
The dynamic tensile test of 93WNiFe powder metallurgy was carried out with the strain rate of 10-4 ~ 103s-1. The results show that the Tungsten alloy with two-phase structure has obvious high strain rate, which leads to plastic reduction. The microscopic mechanism is that with the increase of strain rate, the deformation of the tungsten particle with the body-centered cubic structure is gradually suppressed or even not deformed. The deformation of the cubic structure of the base body has not changed much. Fracture mode is the brittle fracture transition from the ductile fracture of Tungsten particles to the interface of the bonded phase matrix cleavage to tungsten particles