Dendritic Growth Pattern and Dendritic Network Distortion in the Platform of a Ni-based Superalloy  

作　　者：Xiaoli Zhang Yizhou Zhou Yanyun Han Tao Jin Xiaofeng Sun 

机构地区：[1]Institute of Metal Research, Chinese Academy of Sciences

出　　处：《Journal of Materials Science & Technology》2014年第3期223-228,共6页材料科学技术（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2010CB631206);the National Natural Science Foundation of China (Grant Nos. 51271186, U1037601, 50931004, 51204156 and 51101153);the Program of "One Hundred Talented People" of the Chinese Academy of Sciences

摘　　要：The pattern of dendritic growth and distortion of dendritic network in the platform have been investigated by one mold casting with different platform length during directional solidification. As the platform length elongates, the symmetry of dendritic growth along left and right edges gradually worsens in platform base. While the platform length reaches 14 mm, the distortion of dendritic network is first observed in outward platform. It is found that the distortion of dendritic network along platform inside is more serious than that along platform edges. Both [001] deviation and accumulated misorientation along platform inside, up to 9~ and 16.3~, respectively, are far greeter than those along left-outward-right edges. The deformation of dendritic network in a platform may be caused by the asymmetry of the solidification front at the mush zone.The pattern of dendritic growth and distortion of dendritic network in the platform have been investigated by one mold casting with different platform length during directional solidification. As the platform length elongates, the symmetry of dendritic growth along left and right edges gradually worsens in platform base. While the platform length reaches 14 mm, the distortion of dendritic network is first observed in outward platform. It is found that the distortion of dendritic network along platform inside is more serious than that along platform edges. Both [001] deviation and accumulated misorientation along platform inside, up to 9~ and 16.3~, respectively, are far greeter than those along left-outward-right edges. The deformation of dendritic network in a platform may be caused by the asymmetry of the solidification front at the mush zone.

关 键 词：SUPERALLOY Directional solidification Dendritic growth Grain orientation PLATFORM 

分 类 号：TG132.33[一般工业技术—材料科学与工程]