Creep deformation mechanisms in coarse-grained solid solution Mg alloys

被引：39

作者：

Chung, SW ^{[1
]}

Watanabe, H

Kim, WJ

Higashi, K

机构：

[1] Osaka Prefecture Univ, Dept Met & Mat Sci, Sakai, Osaka 5998531, Japan

[2] Hongik Univ, Dept Mat Sci & Engn, Seoul 121791, South Korea

[3] Osaka Municipal Tech Res Inst, Dept Mech Engn, Osaka 5368553, Japan

来源：

MATERIALS TRANSACTIONS | 2004年 / 45卷 / 04期

关键词：

creep; magnesium alloys; high temperature deformation; transition;

D O I：

10.2320/matertrans.45.1266

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Creep deformation behavior of coarse-grained Mg-Al based solid solution alloy (AZ31) was studied in a wide strain rate range of 2 x 10(-5)similar to7 x 10(-2) s(-1) at temperature range of 573similar to673 K. Viscous glide controlled creep (VGC), dislocation climb creep (DGC) and power law breakdown (PLB) showed up in order with increasing stress as the flow rate-control ling process. From the former results for Mg-Al and Mg-Al-Zn alloys, the creep mechanisms of VGC and DCC in Mg and Mg alloys are confirmed. Moreover. several theories presented for DCC and VGC are applied to convey the creep mechanisms in Mg and Mg alloys by analytical way. Transitions in Mg alloys are analyzed also by comparing experimental results and theories. Alloying effects on creep strength and transitions of deformation mechanism are analyzed.

引用

页码：1266 / 1271

页数：6

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