Plasticityimprovement of a Zr-based bulk metallic glass by micro-arc oxidation  

作　　者：Yong-jiang Huang Peng Xue Xiang Cheng Ya-ming Wang Fu-yang Cao Zhi-liang Ning Jian-fei Sun 

机构地区：[1]State Key I.aboratory of Advanced Welding and Joining,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China [2]School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China [3]Key Laboratory of Micro-systems and Micro structures Manufacturing(Harbin Institute of Technology),Ministry of Education,Harbin 150001,Heilongjiang,China [4]Institute for Advanced Ceramics,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China

出　　处：《Journal of Iron and Steel Research International》2017年第4期416-420,共5页

基　　金：the financial support from the National Natural Science Foundation of China(Grant Nos.51371065,51671070,51671067,51671071);the Opening Funding of AWJ-16-Z02 in the State Key Laboratory of Advanced Welding and Joining,China

摘　　要：Mciro-arc oxidation（MAO）was used to coat porous films on the surface of a Zr-based bulk metallic glass sample.The compressive test results indicated that,compared with the as-cast sample,the MAO treated one exhibited higher deformation capacity,associated with multiple shear bands with higher density on the side surface and well-developed vein patterns with smaller size on the fractured surface.The pore in the MAOed film and the matrix/coating interface initiated the shear bands and impeded the rapid propagation of shear bands,thus favoring the enhanced plasticity of the MAO treated sample.The obtained results demonstrated that MAO can be considered as an effective method to finely tune the mechanical performance of monolithic bulk metallic glasses.Mciro-arc oxidation（MAO）was used to coat porous films on the surface of a Zr-based bulk metallic glass sample.The compressive test results indicated that,compared with the as-cast sample,the MAO treated one exhibited higher deformation capacity,associated with multiple shear bands with higher density on the side surface and well-developed vein patterns with smaller size on the fractured surface.The pore in the MAOed film and the matrix/coating interface initiated the shear bands and impeded the rapid propagation of shear bands,thus favoring the enhanced plasticity of the MAO treated sample.The obtained results demonstrated that MAO can be considered as an effective method to finely tune the mechanical performance of monolithic bulk metallic glasses.

关 键 词：Bulk metallic glass Micro-arc oxidation Plasticity Surface modification Shear band 

分 类 号：TG139.8[一般工业技术—材料科学与工程]