The development of superplastic ductilities and microstructural homogeneity in a magnesium ZK60 alloy processed by ECAP

被引：119
作者：
Figueiredo, Roberto B.
Langdon, Terence G. [1 ]
机构：
[1] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA
[2] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 430卷 / 1-2期
基金：
美国国家科学基金会;
关键词：
equal-channel angular pressing (ECAP); homogeneity; magnesium alloys; severe plastic deformation; superplasticity;
D O I：
10.1016/j.msea.2006.05.056
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An extruded ZK60 magnesium alloy was processed by equal-channel angular pressing (ECAP) and then tested in tension at elevated temperatures. The results show the alloy is, superplastic at a testing temperature of 473 K with an optimum ductility of similar to 1310% when using an initial strain rate of 2.0 x 10(-4) s(-1). The results demonstrate that optimum superplasticity is achieved at intermediate strain rates and there are decreases in the elongations to failure at both faster and slower strain rates. Microhardness measurements were taken both on the cross-sectional plane and along the axial direction after processing by ECAP. These measurements show the alloy is essentially homogeneous in the as-pressed condition. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：151 / 156
页数：6
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