Effects of Si on Structure and Properties of Mg-Sn Alloy

摘要：

　　Magnesium alloys are becoming ever more prevalent in automotive and aerospace industries as energy conservation and performance demands increase.However, it is limited on further application in the automotive field for its low strength compared with steel and aluminum alloys.Effects of Si addition on microstructure and mechanical properties of as-cast Mg-5%Sn magnesium alloy were also studied using SEM, XRD and tensile testing.The results show that the phases of as-cast alloy are composed of α-Mg, Mg2Sn; Mg2Si.The addition of Si suppresses the precipitation of the Mg2Sn, Product Chinese character shape phases of Mg2Si.With the increase of Si content, the effect becomes more apparent.When Si content is up to 1.25wt%, the grain refining effect reached best level.The average alloy grain size reduced from 90μm to 30μrn, the tensile strength is the highest.The average tensile strength increased from 128 MPa to 156 MPa.When the Si added at 1.25wt% or less, the hardness and strength were improved with the increase of Si.When 1.25% Si was added, grain did not become further refinement.While Si content was continue to be increase, the tensile strength decreased.

关键词： Magnesium alloy Mg-Sn alloy Microstructure Mechanical properties

作者: Haoran Geng Peng Liu Huawei Jiang Bo Teng

作者单位: School of Materials Science and Engineering,University of Jinan,Jinan,250022,China;Shandong Provinci School of Materials Science and Engineering,University of Jinan,Jinan,250022,China

会议类型: 国际会议

会议名称: 2012 China Functional Materials Technology and Industry Forum(2012中国功能材料科技与产业高层论坛)(CFMTIF2012)

会议地点: 昆明

会议语种:英文

页码: 303-307

在线出版日期: 2012-11-09（万方平台首次上网日期，不代表论文的发表时间）