块状非晶合金室温单轴压缩过程中孔洞的形成及其微观机制  

Void Formation and Microscopic Mechanism for Bulk Metallic Glass Under Uniaxial Compression at Room Temperature

作　　者：杨建林[1] 邓玉福[1] 杨飞[1] 张微[1] 

机构地区：[1]沈阳师范大学物理科学与技术学院,辽宁沈阳110034

出　　处：《中国材料科技与设备》2006年第5期73-77,共5页Chinese Materials Science Technology & Equipment

摘　　要：利用扫描电子显微镜（SEM）、透射电子显微镜（TEM）对室温单轴压缩断裂后块状非晶Zr55Al10Ni5Cu30的微观结构进行了研究。经观察断裂面具有典型的脉纹状结构，且断裂面上和靠近断裂面附近的区域有孔洞形成。研究结果表明：由于塑性形变集中块状非晶形成了局部软化区，软化区内自由体积的成核、生长、合并是形成孔洞的根本原因。The microstructure of fractured Zr55Al10Ni5 Cu30 bulk metallic glass after uniaxial compression testing at room temperature was investigated by scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. Vein like patterns were found in the fracture surface, and voids were found in the area on the fracture surface and in the area nearby the fracture surface. We found that local soft area formed as a result of the concentration of plastic deformation, and voids mainly resulted from nucleation, growth, and coalescence of free volume in soft areas.

关 键 词：块状非晶 孔洞 形变 自由体积 

分 类 号：TG139[一般工业技术—材料科学与工程]