On the threshold stress for superplasticity in Mg-Al-Zn alloys

被引：31

作者：

del Valle, J. A. ^{[1
]}

Carreno, F. ^{[1
]}

Ruano, O. A. ^{[1
]}

机构：

[1] Ctr Nacl Invest Metalurg, Dept Phys Metallurg, CSIC, Madrid 28040, Spain

来源：

SCRIPTA MATERIALIA | 2007年 / 57卷 / 09期

关键词：

magnesium alloys; grain boundary sliding; superplasticity;

D O I：

10.1016/j.scriptamat.2007.07.002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

High threshold stresses for superplasticity are often reported in both Mg-Al-Zn alloys and reinforced magnesium alloys. However, the threshold stresses in Mg-Al-Zn and reinforced alloys differ in their temperature and grain size dependence. It is shown in this work that the origin of the apparent threshold stresses in the Mg-Al-Zn alloys arise from an inadequate assumption of an n = 2 power law in the transition zone between grain boundary sliding and slip creep or to a grain growth effect on the flow stress at low strain rates. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：829 / 832

页数：4

共 25 条

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