Effects of icosahedral phase on mechanical anisotropy of as-extruded Mg-14Li （in wt%） based alloys
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2019年第11期
论文作者：Chuanqiang Li Daokui Xu Baojie Wang Liyuan Sheng Ruizhi Wu Enhou Han
文章页码：2477 - 2484
摘 要：Through investigating and comparing microstructure and crystallographic texture of as-extruded Mg-14Li and Mg-14Li-6Zn-1Y（in wt%） alloys,the differences in their mechanical anisotropy were investigated.It revealed that the formation of I-phase（Mg3Zn6Y,icosahedral structure） can effectively refine grain size.Moreover,compared with Mg-14Li alloy,the texture type of Mg-14Li-6Zn-1Y alloy changed slightly,but its texture intensity decreased remarkably.As a result,the stronger texture contributed to the "normal" mechanical anisotropy of Mg-14Li alloy with higher tensile strength and a lower elongation ratio along transverse direction（TD） than those along extrusion direction（ED）.However,for Mg-14Li-6Zn-1Y alloy,the zonal distribution of I-phase particles along ED caused "abnormal" mechanical anisotropy,i.e.higher tensile strength and better plasticity along ED.
Chuanqiang Li1,2,3，Daokui Xu2，Baojie Wang1,4，Liyuan Sheng1，Ruizhi Wu5，Enhou Han2
1. Peking University,Shenzhen Institute,Shenzhen Key Lab Human Tissue Regenerate & Repair2. Key Laboratory of Nuclear Materials and Safety Assessment,Institute of Metal Research,Chinese Academy of Sciences3. School of Materials and Energy,Guangdong University of Technology4. School of Environmental and Chemical Engineering,Shenyang Ligong University5. Key Laboratory of Superlight Materials & Surface Technology,Ministry of Education,Harbin Engineering University
摘 要：Through investigating and comparing microstructure and crystallographic texture of as-extruded Mg-14Li and Mg-14Li-6Zn-1Y（in wt%） alloys,the differences in their mechanical anisotropy were investigated.It revealed that the formation of I-phase（Mg3Zn6Y,icosahedral structure） can effectively refine grain size.Moreover,compared with Mg-14Li alloy,the texture type of Mg-14Li-6Zn-1Y alloy changed slightly,but its texture intensity decreased remarkably.As a result,the stronger texture contributed to the "normal" mechanical anisotropy of Mg-14Li alloy with higher tensile strength and a lower elongation ratio along transverse direction（TD） than those along extrusion direction（ED）.However,for Mg-14Li-6Zn-1Y alloy,the zonal distribution of I-phase particles along ED caused "abnormal" mechanical anisotropy,i.e.higher tensile strength and better plasticity along ED.
关键词：
