The role of long-period stacking ordered phases in the deformation behavior of a strong textured Mg-Zn-Gd-Y-Zr alloy sheet processed by hot extrusion
发布时间：2021-10-21
点击次数：
DOI码：10.1016/j.msea.2019.02.040
发表刊物：Materials Science and Engineering A
关键字：Magnesium alloys; LPSO phase; Texture; Mechanical anisotropy
摘要：In this work, deformation behavior of an extruded Mg-Zn-Gd-Y-Zr alloy sheet, including mechanical anisotropy and tension-compression asymmetry, were investigated by conducting tension and compression experiments along different directions. Coupling with the strong texture, the role of long-period stacking ordered (LPSO) phases in the deformation behavior was analyzed based on the microscopic plastic deformation theory. The results showed that LPSO phases with different morphologies played different roles in deformation behavior of the strong textured Mg-Zn-Gd-Y-Zr alloy sheet: (i) the irregular-shaped LPSO phases distributed along extrusion direction (ED) brought anisotropic fiber reinforcement and exacerbated the mechanical anisotropy; (ii) the needle-like LPSO phases filled in the grain interior hindered the propagation of twinning boundaries and decreased the tension-compression asymmetry. The results may provide valuable references for the manufacturing of large size Mg/LPSO alloys with low mechanical anisotropy and tension-compression asymmetry, hence making them better to meet the growing need of engineering application.
合写作者：Z.Y. Chen*, J.B. Shao, R.K. Wang, L.H. Mao, C.M. Liu
第一作者：T. Chen
论文类型：期刊论文
学科门类：工学
一级学科：材料科学与工程
文献类型：J
卷号：750
页面范围：31-39
ISSN号：0921-5093
是否译文：否
发表时间：2019-02-14
收录刊物：SCI