The roles of P/B-addition in tailoring δ-phase-enhanced grain boundaries in a nickel-based superalloy

doi:10.1016/j.jallcom.2024.176484

IMR OpenIR

	The roles of P/B-addition in tailoring δ-phase-enhanced grain boundaries in a nickel-based superalloy
	Wu, J.1; Liao, G. J.1; Jiang, C. Z.1; Xie, P.2,3; Jia, D.4; Chen, J. H.2,3
通讯作者	Xie, P.(xiepan@hainanu.edu.cn) ; Chen, J. H.(jhchen123@hainanu.edu.cn)
	2024-12-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	1008 页码:11
摘要	Phosphorus (P) and boron (B) as microalloying elements can play significant roles in improving the hightemperature performance of polycrystalline nickel-based superalloys, but their microscopic mechanism in modifying the alloys' microstructures is still not clarified. Here, we report the distinct roles of P/B elements in tailoring the grain boundary precipitation microstructures of the alloy upon thermal aging. Using advanced electron microscopy techniques, we demonstrate that upon thermal aging P and B can depress development of continuous delta-phase (Ni3Nb) precipitates along grain boundaries by promoting formation of other much smaller grain boundary precipitates. It is identified that these nano-scaled grain boundary precipitates are Nb-B-rich MC carbides, P-rich C14 Laves phase (Ni, Fe, Cr)(2)(Nb, Mo) precipitates, and dispersed delta-phase precipitates. Electron tomography shows that the three nano-scaled grain boundary precipitates all have their own featured threedimensional shapes. In comparison with the alloy without P/B-addition, our study reveals that P/B microalloying can trigger and lead to optimized grain boundary microstructures, enhancing the superalloys' hightemperature properties.
关键词	Superalloy Microalloying Grain boundary precipitation Phase transformation Electron microscopy
资助者	National Natural Science Foundation of China ; Natural Science Foundation of Hunan Province
DOI	10.1016/j.jallcom.2024.176484
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52361005] ; National Natural Science Foundation of China[U23A20392] ; National Natural Science Foundation of China[12474006] ; National Natural Science Foundation of China[12304008] ; Natural Science Foundation of Hunan Province[2022JJ30146]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001320885400001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/190287
专题	中国科学院金属研究所
通讯作者	Xie, P.; Chen, J. H.
作者单位	1.Hunan Univ, Coll Mat Sci & Engn, Ctr High Resolut Electron Microscopy, Changsha 410082, Hunan, Peoples R China 2.Hainan Univ, Innovat Inst Ocean Mat Characterizat Technol, Haikou 570228, Hainan, Peoples R China 3.Hainan Univ, Key Lab Electron Microscopy Hainan Prov P, Haikou 570228, Peoples R China 4.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wu, J.,Liao, G. J.,Jiang, C. Z.,et al. The roles of P/B-addition in tailoring δ-phase-enhanced grain boundaries in a nickel-based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,1008:11.
APA	Wu, J.,Liao, G. J.,Jiang, C. Z.,Xie, P.,Jia, D.,&Chen, J. H..(2024).The roles of P/B-addition in tailoring δ-phase-enhanced grain boundaries in a nickel-based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,1008,11.
MLA	Wu, J.,et al."The roles of P/B-addition in tailoring δ-phase-enhanced grain boundaries in a nickel-based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 1008(2024):11.