Aging characteristics and high temperature properties of Mg-9Gd-3Y-0.3Zr

摘要：

The microstructures and tensile properties of Mg-9Gd-3Y-0.3Zr alloys were investigated by OM,SEM and mechanical property tester.The results show that the microstructure of as-cast sample is a typical dendritic structure,the grain size of extruded sample is finer than that of the as-cast because of recrystallization.The aging response of extruded specimens is quick and marked when the samples are aged at 200 to 250 for different time ℃ ,and the peak aging hardness is about HV120.The tensile strengths at 25,200,250 and 300 ℃ are 375,364,329 and 286 MPa,respectively.The maximum elongation is higher than 18％ at 300 .The ℃ fracture mode is mainly microvoid coalescence fracture combining with brittle cleavage fracture at room temperature,and microvoid coalescence fracture at 250300℃.

关键词： magnesium alloy rare earth aging treatment tensile property

作者: YAO Su-juan YI Dan-qing YANG Sheng LI Wang-xing

作者单位: School of Materials Science and Engineering,Central South University,Changsha 410083,China;Zhengzhou School of Materials Science and Engineering,Central South University,Changsha 410083,China Zhengzhou Research Institute of CHALCO,Zhengzhou 450041,China

会议类型: 国际会议

会议名称: 2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)

会议地点: 长沙

会议语种:英文

在线出版日期: 2007-11-28（万方平台首次上网日期，不代表论文的发表时间）