中国有色金属学会会刊（英文版）
中國有色金屬學會會刊（英文版）
중국유색금속학회회간（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2004年
5期
846-850
,共5页
毛卫民%甄子胜%陈洪涛%钟雪友
毛衛民%甄子勝%陳洪濤%鐘雪友
모위민%견자성%진홍도%종설우
semi-solid%magnesium alloy%electro-magnetic stirring%microstructure
The microstructures of semi-solid AZ91D alloy stirred by rotationally electromagnetic field were studied.The shape of primary α-Mg phase is dendrite under conventional solidification condition and the primary α-Mg grains are changed to the fine rosette-like or granular grains under electromagnetic stirring condition. If the electromagnetic stirring frequencies are low, there are a large amount of fine rosette-like primary α-Mg grains and the fine rosettelike primary α-Mg grain in two dimensions belongs to a single grain in three dimensions; there are also many spherical primary α-Mg grains, they may belong to a single grain in three dimensions and the orientation differences of the grains between them are very small. If the electromagnetic stirring frequencies are high, a lot of the fine rosette-like primary α-Mg grains disappear and are converted into granular grains, and moreover, most of these granular grains belong to different grains in three dimensions.
