Mechanical properties and microstructure of Al-Mg-Mn-Zr alloy processed by equal channel angular pressing at elevated temperature

被引：19

作者：

Ning, Jiang Li ^{[1
]}

Jiang, Da Ming ^{[1
]}

Fan, Xi Gang ^{[1
]}

Lai, Zhong Hong ^{[1
]}

Meng, Qing Chang ^{[1
]}

Wang, Dian Liang ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Prov Hei Long J, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2008年 / 59卷 / 03期

关键词：

equal channel angular pressing; mechanical properties; Al-Mg-Mn-Zr alloy; microstructure;

D O I：

10.1016/j.matchar.2007.01.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An Al-Mg-Mn alloy containing Zr, and a standard 5083Al alloy were fabricated. The as-cast alloys were homogenized, hot extruded and hot ECAP (equal channel angular pressing). After hot extrusion, the ultimate strength of the Al-Mg-Mn-Zr alloy was 30.0 MPa higher than that of 5083Al, but the elongation was 10.1% lower. This was because the Al3Zr dispersoids in the Al-Mg-Mn-Zr alloy enhanced the strength and inhibited the recovery process during the hot extrusion, but simultaneously decreased the ductility. After hot ECAP, the strength of the Al-Mg-Mn-Zr alloy was still 32.6 MPa higher than that of 5083Al but without significant loss of the elongation. This implied that the fine-grained, high-angle boundaries microstructure produced by hot ECAP can effectively enhance the strength with little compromise of the ductility of the Zr-modified alloy. (C) 2007 Elsevier Inc. All rights reserved.

引用

页码：306 / 311

页数：6

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