Evolution of Grain Selection in Spiral Selector during Directional Solidification of Nickel-base Superalloys  

作　　者：Xiangbin Meng Jinguo Li Tao Jin Xiaofeng Sun Changbo Sun Zhuangqi Hu 

机构地区：[1]Institute of Metal Research,Chinese Academy of Sciences,Shenyang 00,China [2]Graduate School of Chinese Academy of Sciences,Beijing 000,China [3]Shenyang Liming Aero-engine(Group) Corporation Ltd.,Aviation Industry Corporation of China(AVIC),Shenyang 110043,China

出　　处：《Journal of Materials Science & Technology》2011年第2期118-126,共9页材料科学技术（英文版）

基　　金：supported by the National Basic Research Program of China ("973 Program") under grant Nos. (2010CB631200 and 2010CB631206);the National Natural Science Foundation of China undergrant No.50931004

摘　　要：The process of grain selection in the spiral selector was investigated by both a ProCAST simulation based on a cellular automaton finite element（CAFE） model and experimental confirmation.The results show that the height of starter block,the spiral diameter and initial angle play an important role in grain selection.The dimension of selector should be maintained in a stable range to optimize the grain orientation and select a single crystal efficiently.A selector which can efficiently select a single crystal had been successfully designed.Grain orientation fluctuation in the spiral part was also studied by means of the variation of thermal condition.The process of grain selection in the spiral selector was investigated by both a ProCAST simulation based on a cellular automaton finite element（CAFE） model and experimental confirmation.The results show that the height of starter block,the spiral diameter and initial angle play an important role in grain selection.The dimension of selector should be maintained in a stable range to optimize the grain orientation and select a single crystal efficiently.A selector which can efficiently select a single crystal had been successfully designed.Grain orientation fluctuation in the spiral part was also studied by means of the variation of thermal condition.

关 键 词：Ni-base single crystal superalloys Grain selection Directional solidification 

分 类 号：TG111.4[金属学及工艺—物理冶金] TK172[金属学及工艺—金属学]