Tensile-compressive creep asymmetry of recent die cast magnesium alloys

被引：9
|
作者：
Xu, Su
Gharghouri, Michael A.
Sahoo, Mahi
机构：
[1] Nat Resources Canada, CANMET Mat Technol Lab, Ottawa, ON K1A 0G1, Canada
[2] Natl Res Council Canada, Canadian Neutron Beam Ctr, Chalk River, ON K0J 1J0, Canada
来源：
ADVANCED ENGINEERING MATERIALS | 2007年 / 9卷 / 09期
关键词：
10;
D O I：
10.1002/adem.200700163
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The tensile-compressive creep asymmetry of die cast magnesium alloys is experimentally explored and the possible deformation mechanisms are discussed. Creep tests were performed under tension and compression at 125°C and 150 °C on die cast Mg alloys AM50, AE44 and AJ62A. Higher tensile than compressive creep strengths were observed for all alloys except for low pressure die cast AM50 at a low creep stress of 35 MPa at 125 °C. An aging treatment of 250 hours at 180 °C was employed for AM50 samples to obtain an over-aged microstructure that would minimize the effects of dynamic precipitation of β-Mgl7A112 on creep. The creep data for the aged samples showed significant scatter, and the trend in tensile-compressive creep asymmetry of the aged samples is not clear for the short-term creep tests under high creep stresses.
引用
收藏
页码：807 / 812
页数：6
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