Effects of Mo addition on microstructure of a 4th generation Ni-based single crystal superalloy

被引：15
作者：
Cheng, Yuan [1 ]
Zhao, Xinbao [1 ]
Xia, Wanshun [1 ]
Pan, Qinghai [1 ]
Yue, Quanzhao [1 ]
Gu, Yuefeng [1 ]
Zhang, Ze [1 ]
机构：
[1] Zhejiang Univ, Inst Superalloys Sci & Technol, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China
来源：
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2022年 / 32卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Ni-based single crystal superalloys; Mo; Segregation ratio; Lattice misfit; STRESS-RUPTURE PROPERTIES; SOLIDIFICATION BEHAVIOR; CREEP; PHASE; RE; SEGREGATION; MOLYBDENUM; ELEMENTS; RU; TA;
D O I：
10.1016/j.pnsc.2022.10.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of Mo addition on the microstructure of a 4th generation Ni-based single crystal superalloy were investigated. Mo addition significantly promoted elements Mo, W and Re partition into. phase and enhanced absolute lattice misfit at 1100 degrees C. The increase of Mo concentration from 2 wt% to 4 wt% also decreased the content of eutectic islands and the segregation ratios of other alloying elements in the as-cast state, especially Re and W. After heat treatments, the size of gamma' phase and width of. channels decreased slightly with higher Mo content. More Mo additions slightly enhanced the segregation behavior of Re while reducing the segregation behavior of Mo. However, it revealed that the primary and secondary dendrite arm spacings were barely affected by Mo addition.
引用
收藏
页码：745 / 751
页数：7
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