期刊
MATERIALS
卷 10, 期 7, 页码 -出版社
MDPI AG
DOI: 10.3390/ma10070822
关键词
Mg-Sn alloy; extrusion; microstructure; precipitation; strengthening
类别
资金
- National Natural Science Foundation of China [51404166, 51401143]
- Shanxi Scholarship Council of China [2014-023]
- Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi [2014017]
- Shanxi Province Science Foundation (Natural Science Foundation of Hebei province) [2016021063, E2016202130]
- Research Foundation from Education Department of Hebei [QN2015035]
- Hebei University of Technology [2015002]
In this study, Mg-8Sn-2Zn-2Al (TZA822) alloys with varying Mg2Sn contents prior to extrusion were obtained by different pre-treatments (without and with T4), and the strengthening response related to micro and nano-size Mg2Sn precipitates in the extruded TZA822 alloys was reported. The results showed that the morphology of nano-size Mg2Sn precipitates exhibits a significant change in basal plane from rod-like to spherical, owing to the decrement in the fraction of micro-size particles before extrusion. Meanwhile, the spherical Mg2Sn precipitates provided a much stronger strengthening effect than did the rod-like ones, which was ascribed to uniform dispersion and refinement of spherical precipitates to effectively hinder basal dislocation slip. As a consequence, the extruded TZA822 alloy with T4 showed a higher tensile yield strength (TYS) of 245 MPa, ultimate tensile strength (UTS) of 320 MPa and elongation (EL) of 26.5%, as well as a lower degree of yield asymmetry than their counterpart without T4. Detailed reasons for the strengthening effect were given and analyzed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据