Creep properties and controlled creep mechanism of as-cast Mg-5Zn-2.5Er alloy

被引：3
|
作者：
李晗 [1 ]
杜文博 [1 ]
李建辉 [1 ]
李淑波 [1 ]
王朝辉 [1 ]
机构：
[1] School of Materials Science and Engineering,Beijing University of Technology
来源：
Transactions of Nonferrous Metals Society of China | 2010年 / 20卷 / 07期
关键词：
magnesium alloy; as-cast magnesium alloy; creep mechanism; erbium;
D O I：
暂无
中图分类号：
TG27 [合金铸造];
学科分类号：
080201 ; 080503 ;
摘要：
The creep behaviors of as-cast Mg-5Zn-2.5Er alloy(mass fraction,%) ,under various applied stresses(50-70 MPa) and creep temperatures(150-200℃) for 100 h,were investigated.The stress exponent n is in the range of 1.5-5.8,and the activation energy Qc is in the range of 28.3-77.1 kJ/mol.With respect to the calculated n and Qc as well as the microstructures after creep,it is suggested that there is a transition region between grain boundary sliding(GBS) dominated creep to dislocation creep mechanism(from n<3 to n>3) ,arising in the steady-stage creep rate value of 2.89×10-9 s-1.
引用
收藏
页码：1212 / 1216
页数：5
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