On Coble creep in Mg-9Al-1Zn alloy with ultrafine-grained microstructure

被引：10
|
作者：
Kim, W. J. [1 ]
机构：
[1] Hongik Univ, Dept Mat Sci & Engn, Seoul 121791, South Korea
来源：
SCRIPTA MATERIALIA | 2008年 / 58卷 / 08期
关键词：
severe plastic deformation (SPD); magnesium alloys; ultrafine-grained microstructure; Coble creep;
D O I：
10.1016/j.scriptamat.2007.11.038
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
High-temperature deformation behavior of AZ91 alloy with ultrafine grains was studied at 473-573 K. Analyses based on the deformation mechanism maps for Mg and comparison of the experimental data with the values predicted by equations for several deformation mechanisms indicated that Coble creep was the rate-controlling deformation mechanism in low strain rate range. The critical grain size where Coble creep can be detected in Mg at a given strain rate and temperature was calculated. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：659 / 662
页数：4
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