Effect of Ti and Al on microstructure and partitioning behavior of alloying elements in Ni-based powder metallurgy superalloys

被引:0
作者
Yin-long Shao
Jing Xu
Hao Wang
Yi-wen Zhang
Jian Jia
Jian-tao Liu
Hai-liang Huang
Ming Zhang
Zhi-cheng Wang
Hong-fei Zhang
Ben-fu Hu
机构
[1] Guangdong Institute of Materials and Processing,Guangdong Provincial Key Laboratory for Technology and Application of Metal Toughening
[2] University of Science and Technology Beijing,School of Materials Science and Engineering
[3] Central Iron and Steel Research Institute,High Temperature Material Research Institute
来源
International Journal of Minerals, Metallurgy, and Materials | 2019年 / 26卷
关键词
superalloy; Al; Ti; microstructure; partitioning;
D O I
暂无
中图分类号
学科分类号
摘要
The microstructure and partitioning behaviors of alloying elements in the γ and γ′ phases in Ni-based powder metallurgy superalloys with different Ti and Al contents were investigated. The results showed that Ti and Al were mainly enriched in the γ′ phase, partially partitioned in the γ matrix, and slightly distributed in the carbides. Different Ti and Al contents in various alloys influenced the composition and amount of MC carbides but did not influence the MC carbides’ morphology. With increasing Ti and Al contents, γ + γ′ fan-type structures formed at the grain boundary, eventually resulting in a coarsened γ′ phase. In addition, the morphology of the secondary γ′ phase transformed from nearly spherical to cuboidal. The saturation degrees of Cr, Co, and Mo in the γ matrix were substantially improved with increasing Ti and Al contents.
引用
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页码:500 / 506
页数:6
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