压缩变形对钨渗铜合金微观组织及性能的影响

通过静态压缩试验,研究了80钨渗铜合金在不同变形量条件下的微观组织及力学性能。试验得到了微观组织、力学性能随压缩变形量的变化规律。随着变形量的增加,组织形貌发生显著变化,钨颗粒沿轴向被拉长,铜粘结相也被拉成长条状。随着变形量的增加,80W-Cu的硬度不断增大。对合金进行室温拉伸试验,断口的观察发现80钨渗铜合金在室温下的断裂是钨颗粒的解理断裂,W-Cu界面的分离,铜粘结相的撕裂3种断裂模式共同作用的结果,但钨颗粒解理断裂是其主要的断裂方式。

Effect of compressive deformation on microstructures and properties of infiltrated W - Cu composites

Microstructures and properties of infiltrated 80% tungsten - copper alloy in different deformation were investigated by the method of static compression tests. Microstructures and mechanical properties changed with compression deformation changing, tungsten particle and copper phase were extended along axial direction. The hardness of infiltrated 80 tungsten - copper alloy increased with the increase of deformation. The observation of tensile fracture showed that the fracture of alloy in room temperature was composed of tungsten particle cleavage , tungsten - binder interface separation and copper binder fracture. The dominant fracture mode was cleavage of tungsten particle.