Tensile properties and fracture reliability of a glass-coated Co-based amorphous microwire  

作　　者：Xiao-dong Wang Huan Wang Hong-xian Shen Fa-xiang Qin Da-wei Xing Jing-shun Liu Dong-ming Chen Jian-fei Sun 

机构地区：[1]School of Materials Science and Engineering,Harbin Institute of Technology [2]1D Nanomaterials Group, National Institute for Material Science

出　　处：《International Journal of Minerals,Metallurgy and Materials》2014年第6期583-588,共6页矿物冶金与材料学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51371067);supported by the Japan Society for the Promotion of Science(JSPS) fellowship and Grants-in-Aid for Scientific Research(No.25-03205)

摘　　要：Co68.15Fe4.35Si12.25B15.25 （at%） amorphous microwires with a smooth surface and a circular cross-section were fabricated by the glass-coated melt spinning method. Their mechanical properties were evaluated through tensile tests of the glass-coated amorphous mi-crowires, and their fracture reliability was estimated using two-and three-parameter Weibull analysis. X-ray diffraction and transmission electron microscopy results showed that these glass-coated Co-based microwires were mostly amorphous. The coated Co-based microwires exhibit a tensile strength of 1145 to 2457 MPa, with a mean value of 1727 MPa and a variance of 445 MPa. Weibull statistical analysis showed that the tensile two-parameter Weibull modulus of the amorphous microwires is 4.16 and the three-parameter Weibull modulus is 1.61 with a threshold value as high as 942 MPa. These results indicate that the fabricated microwires exhibit good tensile properties and fracture reliability, and thus appear to be good candidates for electronics reliability engineering applications.Co68.15Fe4.35Si12.25B15.25 （at%） amorphous microwires with a smooth surface and a circular cross-section were fabricated by the glass-coated melt spinning method. Their mechanical properties were evaluated through tensile tests of the glass-coated amorphous mi-crowires, and their fracture reliability was estimated using two-and three-parameter Weibull analysis. X-ray diffraction and transmission electron microscopy results showed that these glass-coated Co-based microwires were mostly amorphous. The coated Co-based microwires exhibit a tensile strength of 1145 to 2457 MPa, with a mean value of 1727 MPa and a variance of 445 MPa. Weibull statistical analysis showed that the tensile two-parameter Weibull modulus of the amorphous microwires is 4.16 and the three-parameter Weibull modulus is 1.61 with a threshold value as high as 942 MPa. These results indicate that the fabricated microwires exhibit good tensile properties and fracture reliability, and thus appear to be good candidates for electronics reliability engineering applications.

关 键 词：cobalt alloys amorphous alloys GLASS FRACTURE tensile testing 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TB114.3[金属学及工艺—合金]