Crystallography of Mg2Sn precipitates in Mg-Sn-Mn-Si alloy
The microstructures of a Mg-Sn based alloy with trace additions of Mn and Si after various ageing heat-treatments were investigated.The alloy was found to contain mostly Mg2Sn(β) precipitates.The morphology and orientation relationships(OR) of Mg2Sn precipitates were analyzed by using TEM.The Mg2Sn precipitates mainly exhibit three shapes: lath,polygon and plate.Four ORs between Mg2Sn precipitates and Mg(α) matrix are repeatedly detected,and two of them have never been reported before.Most of the lath-shaped β precipitates exhibit two OR.One is (0001)α//(110)β,//11(2)0α //001β (OR-1),with the long axis along 11(2)0α//001β; and the other is (0001)α//(110)β,1(1)00α //31(1)β(OR-2,a new OR),with the long axis along 1100α//311β.The polygonal β exhibits (0001)α//(111)β,2(1)(1)0α//(1)10β(OR-3),with several pairs of facets.The plate-shaped β exhibits (0001)α//(111)β,2(1)(1)0a deviates by about 9°from〔110〕β(OR-4,a new OR).
Mg-Sn alloy crystallography Mg2Sn precipitate orientation relationship
ZHANG Min ZHANG Wen-zheng ZHU Guo-zhen YU Kun
Laboratory of Advanced Materials,Department of Materials Science and Engineering,Tsinghua University Department of Materials Science and Engineering,Central South University,Changsha 410083,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）