Microstructure, mechanical properties and deformation mechanisms of an as-cast Mg–Zn–Y–Nd–Zr alloy for stent applications

查看全文 作　　者：Jianfeng [1]Wang;Hongbo [1]Zhou;Liguo [1]Wang;Shijie [1]Zhu;Shaokang [1]Guan

机构地区：[1]School of Materials Science and Engineering, Zhengzhou University

出　　处：《Journal of Materials Science & Technology》索引2019年第35卷第7期,共7页

基　　金：supported by the National Key Research and Development Program of China (No. 2017YFB0702504);the National Natural Science Foundation of China (Nos. 51501166 and 51171174);Outstanding Young Talent Research Fund of Zhengzhou University (No. 1421320046) 摘　　要：A new Mg-2Zn-0.2Y -0.5N d-0.4Zr (wt%) alloy designed specially for stent applications has been developed. The as-cast alloy is featured with equiaxed grains with a mean size of about 40 μm and a small am ount of second phase (T phase) distributed discontinuously either at the grain boundaries or inside the grains. This alloy exhibits a tensile elongation of up to 35%, which is much larger than that of most reported other as-cast Mg alloys. The tensile deform ation mechanisms have also been investigated. The results show that, besides basal slip,{10-12} extension twining and non-basal pyramidal slips can also be observed at initial stage and later stage during tensile deform ation, respectively, which are responsible for the good room -tem perature ductility. 关键词：MAGNESIUM alloys VASCULAR STENTS MICROSTRUCTURE Mechanical properties Deformation mechanisms

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Microstructure, mechanical properties and deformation mechanisms of an as-cast Mg–Zn–Y–Nd–Zr alloy for stent applications

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