Effect of Ti and Al on Microstructure and Partitioning Behaviors of Alloying Elements in Advanced Nickel-based PM Superalloy
The microstructure and partitioning behaviors of alloying elements Cr,Co,Mo,W,Al,Ti,Ta,Nb,etc.on the γ and γ′ phases of advanced nickel-based powder metallurgy superalloys with varying Ti and Al contents have been investigated.The results demonstrate that Ti and Al mainly enrich in γ′ phase,partially partition in γ matrix,and slightly distribute in the carbides.The alteration of Ti and Al contents has no influence on the morphology and type of carbides,but the composition and amount.The growth of Ti and Al has a great effect on γ′ phase,forming a γ+γ′ fan-type structure at the grain boundary,eventually develops into coarser γ′.Increasing Ti and Al results in the morphology of secondary γ′ phase transforming from near spherical to cuboidal,also rising its size and content.The change of Ti and Al content also has some impact on the partitioning behaviors of alloying elements between γ and γ′ phases,especially on Cr,Co and Mo.The saturation degrees of the above three elements in γ matrix significantly heighten with the increase of Ti and Al addition.
Nickel-based PM superalloy Ti Al microstructure partitioning
Shao Yinlong Wang Hao Zhang Yiwen Jia Jian Huang Hailiang Zhang Ming Wang Zhicheng Zhang Hongfei Hu Benfu
School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100 High Temperature Material Research Institute,Central Iron and Steel Research Institute,Beijing 10008
国际会议
北京
英文
1134-1140
2018-09-16（万方平台首次上网日期，不代表论文的发表时间）