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High-performance hot-warm rolled Zn-0.8Li alloy with nano-sized metastable precipitates and sub-micron grains for biodegradable stents

查看全文 作　　者：Zhen [1]Li;Zhang-Zhi [2]Shi;Yuan [1]Hao;Hua-Fang [1]Li;Xue-Feng [2]Liu;Alex [3]AVolinsky;Hai-Jun [4,5]Zhang;Lu-Ning [1]Wang 高影响力作者 机构地区：[1]Beijing Advanced Innovation Center for Materials Genome Engineering,State Key Laboratory for Advanced Metals and Materials,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,100083,China;[2]Beijing Laboratory of Metallic Materials and Processing for Modern Transportation,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing,100083,China;[3]Department of Mechanical Engineering,University of South Florida,Tampa,FL,33620,USA;[4]Department of Interventional and Vascular Surgery,The Tenth People’s Hospital of Shanghai,Tongji University,Shanghai,200072,China;[5]National United Engineering Laboratory for Biomedical Material Modification,Branden Industrial Park,Qihe Economic&Development Zone,Dezhou,251100,China高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2019年第35卷第11期,共7页高影响力期刊 基　　金：supported financially by the National Key R&D Program of China (No.2016YFC1102500);the National Natural Science Foundation of China (No.51871020) 摘　　要：Fabricated through a newly developed hot-warm rolling process,Zn-0.8 Li(wt%)alloy has ideal strength and ductility far beyond the mechanical benchmark of materials for biodegradable stents.Precipitation of needle-like Zn in primary p-LiZn4 phase is observed in Zn-Li alloy for the first time.Orientation relationship between them can be described as[1-213]β//[2-1-10](Zn),(10-10)βabout 4.5°from(0002)(Zn).Zn grains with an average size of 640 nm exhibit strong basal texture,detected by transmission electron back-scatter diffraction.Li distribution is determined by three-dimensional atom probe,which reveals the formation of nano-sized metastableα-Li2Zn3 precipitates with a number density of 7.16×10^22 m^-3.The fine lamellar Zn+β-LiZn4 structure,sub-micron grains and the nano-sized precipitates contribute to the superior mechanical properties. 关 键 词：Zn-Li alloy Mechanical properties Three-dimensional atom probe Precipitation Recrystallization
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