陈宗宁

个人信息Personal Information

教授

博士生导师

硕士生导师

任职 : 大连理工大学宁波研究院

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:材料科学与工程学院

学科:材料加工工程

办公地点:大连理工大学主校区铸造中心401室
宁波市江北区育才路26号大连理工大学宁波研究院

电子邮箱:znchen@dlut.edu.cn

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The influence of Sc addition on microstructure and tensile mechanical properties of Mg-4.5Sn-5Zn alloys

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论文类型:期刊论文

发表时间:2019-09-01

发表刊物:JOURNAL OF MAGNESIUM AND ALLOYS

收录刊物:SCIE

卷号:7

期号:3

页面范围:456-465

ISSN号:2213-9567

关键字:Magnesium alloys; Scandium; Microstructure; Mechanical properties

摘要:The microstructure and tensile properties of the as-cast and as-rolled Mg-4.5Sn-5Zn alloys by adding various Sc content were investigated. Improvement of the tensile properties in as-cast Sc-containing alloys is attributed to the grain refinement and modification of secondary phase morphology. Three types of precipitates, namely spherical Mg2Sn, rod-like MgZn and Sc-rich phases were dispersed in the matrix of the Sc added Mg-4.5Sn-5Zn alloys after hot rolling deformation. In addition, weakening and deflecting of the basal texture in as-rolled alloys were found and were attributed to Sc addition. Further increasing the Sc addition rate to 0.4wt.%, however, resulted in the clustering of the Sc-rich phases and was found to reduce the tensile properties of the alloy, especially the elongation. The as-rolled Mg-4.5Sn-5Zn-0.3Sc alloy exhibits an optimum combination of tensile properties. The ultimate tensile strength, yield strength and elongation are 293.0 MPa, 164.2Mpa and 21.5%, respectively, and the elongation is about 68% higher than that of Sc-free alloy. (C) 2019 Published by Elsevier B.V. on behalf of Chongqing University.