Cryogenic treatment induced hardening for Cu-Zr-Ag-Al bulk metallic glasses  

作　　者：CHEN ZhenHua ZHANG LiKe LIU JiZi CHEN Ding 

机构地区：[1]College of Materials Science and Engineering,Hunan University

出　　处：《Chinese Science Bulletin》2013年第7期637-641,共5页

基　　金：supported by the Program for New Century Excellent Talents in University (Grant No. NCET-10-0360)

摘　　要：Little is known about the mechanical properties of bulk metallic glassy alloys(BMGs) after cryogenic treatment.In this study,the effects of cryogenic treatment(CT) on the microstructural transition and the mechanical properties of Cu-based bulk metallic glass(BMG) were studied.The results showed that submicron AlCu2Zr and Cu5Zr phases can precipitate from the Cu-Zr-Ag-Al matrix after 192 h CT.The formation of these nanometer-sized crystalline phases substantially enhanced the mechanical properties of the bulk amorphous alloy.The micro-hardness and the compressive strength were found to increase respectively from 501 HV and 1510 MPa to 595 HV and 1910 MPa after cryogenic treatment.CT is a promising approach to strengthening metal glasses.Little is known about the mechanical properties of bulk metallic glassy alloys （BMGs） after cryogenic treatment. In this study, the effects of cryogenic treatment （CT） on the microstructural transition and the mechanical properties of Cu-based bulk metallic glass （BMG） were studied. The results showed that submicron A1Cu2Zr and CusZr phases can precipitate from the Cu-Zr-Ag-A1 matrix after 192 h CT. The formation of these nanometer-sized crystalline phases substantially enhanced the mechanical properties of the bulk amorphous alloy. The micro-hardness and the compressive strength were found to increase respectively from 501 HV and 1510 MPa to 595 HV and 1910 MPa after cryogenic treatment. CT is a promising approach to strengthening metal glasses.

关 键 词：大块金属玻璃 低温处理 大块非晶合金 AL 硬化 诱导 深冷处理 机械性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程] S682.29[金属学及工艺—合金]