两种状态钨合金球力学性能及损伤模式对比试验研究

Comparison of Mechanical Properties and Damage Mode of Tungsten Alloy Spheres in Two Different States

采用静态与动态加载试验的方法,研究了同一牌号、相同尺寸的烧结态与精磨态两种状态的钨合金球的力学性能。同时通过电镜扫描的手段,观察了两种状态的钨合金球试验前表面与内部金相结构及静态试验后表面的损伤模式,并分析了两种状态钨合金球产生力学性能差异的原因。研究结果表明:烧结态钨合金球表面因其钨颗粒与黏结相分布均匀,静态条件下其极限压溃载荷是精磨态钨合金球的2.02倍,动态条件下其性能也明显优于精磨态钨合金球。

In this paper,we studied the mechanical properties of tungsten alloy spheres in sintered and polished states using the quasi static test and the dynamic loading test,observed their metallographic structure and damage mode before and after the test using SEM,and analyzed the causes leading to their difference.The result showed that the surface microstructure of the tungsten alloy sphere in the sintered state was more uniform than that in the polished state,which accounts for its better mechanical properties.