Effect of carbon additions on the microstructure of a single crystal Ni-based superalloy AM3  

作　　者：Yu Zhuhuan Liu Lin Zhao Xinbao Zhang Weiguo Zhang Jun Fu Hengzhi 

机构地区：[1]State Key Laboratory. of Solidification Processing, Northwestern Polytechnic University, Xi＇an 710072, China [2]Materials Science and Engineering Department, Xi＇an University of Science and Technology, Xi＇an 710054, China

出　　处：《China Foundry》2010年第4期352-356,共5页中国铸造（英文版）

基　　金：supported financially by the National Natural Science Foundation of China (Grant No. 50771081,50931004);the National Basic Research Program of China (2010CB631202)

摘　　要：The microstructure of experimental nickel-base single crystal superalloys with different levels of carbon has been studied. The results indicated that with increasing carbon addition, the liquidus temperature decreased obviously and the as-cast microstructures exhibited a decrease in the amount of γ/γ′ eutectic structure and an increase in the volume fraction of carbides. The carbides formed in these alloys were most script-type MC carbides which appeared continuous dendritic networks in the interdendritic region. The segregation behavior of element W was influenced by the carbon addition.The microstructure of experimental nickel-base single crystal superalloys with different levels of carbon has been studied. The results indicated that with increasing carbon addition, the liquidus temperature decreased obviously and the as-cast microstructures exhibited a decrease in the amount of γ/γ′ eutectic structure and an increase in the volume fraction of carbides. The carbides formed in these alloys were most script-type MC carbides which appeared continuous dendritic networks in the interdendritic region. The segregation behavior of element W was influenced by the carbon addition.

关 键 词：Ni-based superalloy single crystal CARBON SEGREGATION EUTECTIC 

分 类 号：TG132.33[一般工业技术—材料科学与工程]