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

被引：12
|
作者：
Li Han [1 ]
Du Wen-bo [1 ]
Li Jian-hui [1 ]
Li Shu-bo [1 ]
Wang Zhao-hui [1 ]
机构：
[1] Beijing Univ Technol, Sch Mat Sci & Engn, Beijing 100124, Peoples R China
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; QUASI-CRYSTALLINE PHASE; MAGNESIUM ALLOYS; BEHAVIOR;
D O I：
10.1016/S1003-6326(09)60280-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
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 degrees C) for 100 h, were investigated. The stress exponent n is in the range of 1.5-5.8, and the activation energy Q. is in the range of 28.3-77.1 kJ/mol. With respect to the calculated n and a 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 x 10(-9) s(-1).
引用
收藏
页码：1212 / 1216
页数：5
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