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《Chinese Journal of Materials Research》 2003-06
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Microstructure and creep behavior of a cast Mg-RE alloy

SHA Guiying XU Yongbo HAN Enhou (1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 2.School of Mechanical Engineering, Harbin Engineering University, Harbin 150001) To whom correspondence should be addressed, Tel:(024)23971833,  
The compress creep tests of a cast Mg-RE alloy were carried out at constant stress on Mayes fatigue machine in air, and the creep behavior of the alloy was investigated at different temperatures. Observations by SEM and TEM show that the creep resistance of the alloy is relatively high at 473K under stress ≤100 MPa and the steady creep rate is lower than 2.66×10-6 s-1. The eutectic β phases comprised Ce, La, Nd etc elements and dynamic precipitations during creep are proposed to be the principal strengthening mechanism of the alloy, whereas the main reason for the decrease of the creep resistance is attributed to be twins shear deformation and cracking of the eutectic β phases.
【Fund】: 八六三计划新材料领域资助项目2001AA331050和2002AA331120
【CateGory Index】: TG115
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【Co-references】
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1 CHEN Xian-ming~1 LUO Cheng-ping~2 LIU Jiang-wen~2 (1.College of Electronic and Information &Mechanical Engineering,Zhaoqing University,Zhaoqing,Guangdong, 526061,China;2.College of Material,South China University of Technology,Guangdong,Guangzhou,510641,China);TEM Analysis of the micro-arc Oxidation Coatings on Magnesium alloys in a Aluminate Alkalinous electrolytic solution[A];[C];2009
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