Elevated-temperature plasticity and mechanical properties of a rare earth-modified Mg-Zn-Al alloy

被引：15

作者：

Zhang, Jing ^{[1
,2
]}

Dou, Yuchen ^{[1
]}

Zhang, Baoxiang ^{[1
]}

Luo, Xiaodong ^{[1
]}

机构：

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

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

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 06期

关键词：

Magnesium alloys; Mechanical properties; Microstructure; Dynamic precipitation; Extrusion; ZR ALLOY; MICROSTRUCTURE; MAGNESIUM; ER;

D O I：

10.1016/j.matlet.2011.01.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The elevated-temperature plasticity and flow behavior of an Er-modified, heat-resistant ZA73 alloy was evaluated by thermal simulation. The results showed that the addition of Er to ZA73 alloy notably improves the deformability and higher strain rate and temperature favors hot deformation. Bars with sound surface quality were successfully extruded at 350 degrees C and a strain rate of similar to 0.1 s(-1). Furthermore, dynamic precipitation of nano-sized spherical tau phase was found to occur uniformly in the alpha-Mg matrix during hot extrusion, which is considered helpful to both strength and plasticity enhancement. The yield strength and ultimate tensile strength of the as-extruded bars reached 240-265 MPa and 355-360 MPa, respectively, while maintaining a large elongation rate of 18-19.5%. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：944 / 947

页数：4

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