Effects of Sn on microstructure of as-cast and as-extruded Mg-9Li alloys

被引：22

作者：

Jiang, Bin ^{[1
,2
,3
]}

Zeng, Ying ^{[1
,2
]}

Zhang, Ming-xing ^{[4
]}

Yin, Heng-mei ^{[1
,2
]}

Yang, Qing-shan ^{[1
,2
]}

Pan, Fu-sheng ^{[1
,2
,3
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China

[3] Chongqing Acad Sci & Technol, New Mat Ctr, Chongqing 401123, Peoples R China

[4] Univ Queensland, Sch Mech & Min Engn, St Lucia, Qld 4072, Australia

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2013年 / 23卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Mg-9Li alloys; Sn; microstructure; heterogeneous nucleation; GRAIN-REFINEMENT; MG; BEHAVIOR;

D O I：

10.1016/S1003-6326(13)62546-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of Sn addition on the microstructure of as-cast and as-extruded Mg-9Li alloys were investigated. The results show that alpha-Mg, beta-Li, Li2MgSn, and Mg2Sn are primary phases in the microstructures of the as-cast and as-extruded Mg-9Li-xSn (x=0, 5; in mass fraction, %) alloys. Li2MgSn phase evolves from continuously net-like structure in the as-cast state to fine granular in the as-extruded state. After the extrusion, Mg-9Li-5Sn alloy has finer microstructures. Li2MgSn or Mg2Sn compound can act as the heterogeneous nucleation sites for dynamic recrystallization during the extrusion due to the crystallography matching relationship. Extrusion deformation leads to dynamic recrystallization, which results in the grain refinement and uniform distribution. The as-extruded Mg-9Li-5Sn alloy possesses the lowest grain size of 45.9 mu m.

引用

页码：904 / 908

页数：5

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