摘要
通过室温下冷轧试验,研究了70MoCu合金(由质量分数分别为70%的Mo和30%的Cu组成)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、力学性能随冷轧变形量的变化规律。随着变形量的增加,组织形貌发生显著变化,钼颗粒沿轴向被拉长,粘结相铜也被拉成长条状;70MoCu合金最先在Mo-Cu或Mo-Mo界面开裂,接着是钼自身的开裂;同时,70MoCu的硬度不断增大。通过合金的室温拉伸试验,对断口的观察发现70MoCu合金在室温下的断裂是粘结相Cu的撕裂,Mo-Cu界面的分离,Mo-Mo界面的分离,Mo颗粒的解理断裂等4种断裂模式共同作用的结果,粘结相Cu的撕裂和Mo-Cu界面的分离是其主要的断裂方式。
Microstructures and properties of infiltrated 70% molybdenum-copper alloy which was formed from 30% copper and the balance molybdenum, with different deformation were investigated at room-temperature by the cold rolling. Microstructures and mechanical properties changed with compression deformation changing, molybdenum particle and copper phase were extended along axial direction. First, Mo-Cu or Mo-Mo binder interface separation was happened, then molybdenum particle began to rupture. The hardness of the infiltrated 70MoCu alloy increases with the increase of deformation. The observation of tensile fracture shows that the fracture of alloy at room tem- perature is composed of copper binder fracture, molybdenum-copper binder interface separation, molybdenum-molybdenum binder interface separation and molybdenum particle cleavage. The dominant fracture mode was copper binder fracture and molybdenumcopper binder interface separation.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
2007年第2期142-147,共6页
Chinese Journal of Rare Metals
关键词
钼铜合金
微观组织
断裂模式
molybdenum-copper composites
microstructure
fracture mode
