Microstructure, mechanical properties and deformation mechanisms of an as-cast Mg–Zn–Y–Nd–Zr alloy for stent applications
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第7期
论文作者：Jianfeng Wang Hongbo Zhou Liguo Wang Shijie Zhu Shaokang Guan
文章页码：1211 - 1217
摘 要：A new Mg–2Zn–0.2Y–0.5Nd–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 amount 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 deformation mechanisms have also been investigated. The results show that, besides basal slip, {10-1 2} extension twining and non-basal pyramidal slips can also be observed at initial stage and later stage during tensile deformation, respectively, which are responsible for the good room-temperature ductility.
Jianfeng Wang，Hongbo Zhou，Liguo Wang，Shijie Zhu，Shaokang Guan
School of Materials Science and Engineering, Zhengzhou University
摘 要：A new Mg–2Zn–0.2Y–0.5Nd–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 amount 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 deformation mechanisms have also been investigated. The results show that, besides basal slip, {10-1 2} extension twining and non-basal pyramidal slips can also be observed at initial stage and later stage during tensile deformation, respectively, which are responsible for the good room-temperature ductility.
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