Microstructure and mechanical properties of Mg-14Li-1Al-0.3La alloys produced by two-pass extrusion

被引：17
|
作者：
Li, Ruihong [1 ]
Jiang, Bin [2 ,3 ]
Chen, Zhijun [4 ]
Pan, Fusheng [2 ,3 ]
Gao, Zhanyong [1 ]
机构：
[1] Inner Mongolia Univ Sci & Technol, Sch Mat & Met, Baotou 014010, Peoples R China
[2] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[3] Chongqing Acad Sci & Technol, Chongqing 401123, Peoples R China
[4] Inner Mongolia First Machinery Grp Corp, Subco 10, Baotou 014030, Peoples R China
来源：
JOURNAL OF RARE EARTHS | 2017年 / 35卷 / 12期
关键词：
Mg-Li alloy; As-cast; Extrusion; Microstructure; Tensile properties; MG-LI ALLOY; DEFORMATION-BEHAVIOR; CRYSTALLOGRAPHIC TEXTURE; ICOSAHEDRAL PHASE; EVOLUTION; ANISOTROPY; ELEMENTS; ND;
D O I：
10.1016/j.jre.2017.08.001
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The microstructure of as-cast and extruded Mg-14Li-1Al-(0, 0.3) La alloys was examined with XRD, OM, SEM, and EDS. The mechanical properties of the extruded specimens with and without La were compared. The results show that La addition has an obvious effect on the microstructure of the as-cast LA141 alloy by reducing the average grain size from 600 to 220 mu m. beta-Li and LiMgAl2 phases are observed in both alloys, and long-rod-shaped Al2La phase is also observed in the La containing alloy. After extrusion, Al2La phases are short-rod-shaped and distribute evenly in the alloy. LA141-0.3La alloy has higher elongation (34%), which is attributed to refined microstructure and weak texture due to short-rod-like Al2La phase. (c) 2017 Published by Elsevier B.V. on behalf of Chinese Society of Rare Earths.
引用
收藏
页码：1268 / 1272
页数：5
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