标题：Filling and solidification of TiAl melt in centrifugal field
作者机构：Department of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
会议名称：5th International Forum on Advanced Material Science and Technology
会议日期：JUN 14-17, 2006
关键词：TiAl melt;filling and solidification;model;centrifugal field;defects
摘要：A model was established based on the combination of the equation of continuity,the equation of conservation of momentum and the equation of general energy to describe the filling and solidification of TiAl melt by permanent mold centrifugal casting. The model was solved numerically and the filling and solidification processes in the centrifugal field were discussed. The results indicate that the centrifugal field essentially influences the filling and solidification processes of TiAl melt. The melt will first fill the cavity along the back boundary until it reaches the end. After the end is fully filled,the whole cavity will be filled gradually by the way that free surface of the melt moves towards the entrance,hence the entrance is the last part to be filled. Furthermore,the mechanism by which internal defects can be formed in centrifugally cast TiAl components were interpreted.