Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system  

作　　者：WU Yuan SONG WenLi ZHANG ZhongYan HUI XiDong MA Dong WANG XunLi SHANG XinCun LU ZhaoPing 

机构地区：[1]State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China [2]Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA [3]Department of Mathematics and Mechanics, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Chinese Science Bulletin》2011年第36期3960-3964,共5页

基　　金：supported in part by the National Natural Science Foundation of China (50725104, 51010001 and 51001009);China Postdoctoral Science Foundation (20100470208) ;the Fundamental Research Funds for the Central Universities (FRF-BR-10-036B)

摘　　要：Bulk metallic glass (BMG) composites with the austenite B2 phase as reinforcement macroscopically showed strain hardening behavior due to the plasticity induced by martensitic transformation during deformation. Relationship between characteristics of the B2-CuZr reinforcing phase and uniaxial compressive properties of CuZr-based BMG composites was studied. Mechanical properties of these BMG composites were found to depend on not only the reinforced phases but also the amorphous matrix,and the yield and fracture strength can be roughly estimated by the rule of mixture principle. Distribution of the reinforced B2-CuZr phase has an important impact on the compressive plasticity even for the composites with a similar volume fraction of the crystalline phase.Bulk metallic glass （BMG） composites with the austenite B2 phase as reinforcement macroscopically showed strain hardening behavior due to the plasticity induced by martensitic transformation during deformation. Relationship between characteristics of the B2-CuZr reinforcing phase and uniaxial compressive properties of CuZr-based BMG composites was studied. Mechanical properties of these BMG composites were found to depend on not only the reinforced phases but also the amorphous matrix,and the yield and fracture strength can be roughly estimated by the rule of mixture principle. Distribution of the reinforced B2-CuZr phase has an important impact on the compressive plasticity even for the composites with a similar volume fraction of the crystalline phase.

关 键 词：复合材料结构 大块金属玻璃 压缩性能 相变诱导塑性 非晶复合材料 应变硬化 变形过程 机械性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程] V214.8[金属学及工艺—合金]