Microstructure and creep behavior of the extruded Mg-4Y-4Sm-0.5Zr alloy

被引：15
作者：
Wang, Qudong [1 ]
Li, Daquan [1 ]
Blandin, J. J. [2 ]
Suery, M. [2 ]
Donnadieu, P. [2 ]
Ding, Wenjiang [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200240, Peoples R China
[2] UJF, CNRS, UMR 5266, Sci & Ingn Mat & Procedes SIMAP,INPG, F-38402 St Martin Dheres, France
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2009年 / 516卷 / 1-2期
关键词：
Mg-Y-Sm alloy; Creep; Microstructure; Extrusion; MECHANICAL-PROPERTIES; MG-4Y-3RE ALLOY; MAGNESIUM ALLOY; PHASES;
D O I：
10.1016/j.msea.2009.03.084
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure and creep behavior of the extruded Mg-4Y-4Sm-0.5Zr alloy were investigated. It was shown that dynamic recrystallization (DRX) took place during extrusion at 673 K and equilibrium beta precipitates were observed in the extruded alloys. Numerous fine globular beta' precipitates homogeneously formed within grains when the as-extruded alloy was aged at 473 K for 16 h, leading to effectively strengthening. The as-extruded alloy exhibits good creep resistance. The creep stress exponent n is 4.42 and the creep activation energy Q is 140.6 kJ mol(-1) suggesting that dislocation climb plays a dominant role when the alloy is crept at temperatures ranging from 453 K to 493 K and at a stress of 180 MPa. (c) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：189 / 192
页数：4
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