Tailoring microstructural stability and stress rupture properties of a solid-solution strengthened Fe-Ni-based superalloy via niobium addition

doi:10.1016/j.jallcom.2024.176628

IMR OpenIR

	Tailoring microstructural stability and stress rupture properties of a solid-solution strengthened Fe-Ni-based superalloy via niobium addition
	Wang, J. Q.1,2,3; Wu, J. R.1,2,3; Guan, X. J.2,3; Wu, Y. S.2,3; Cheng, S. H.1,2,3; Qin, X. Z.2,3,4; Zhou, L. Z.2,3
通讯作者	Wu, Y. S.(yswu16b@imr.ac.cn) ; Qin, X. Z.(xzqin@nimte.ac.cn) ; Zhou, L. Z.(lzz@imr.ac.cn)
	2024-12-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	1008 页码:15
摘要	The influence of niobium (Nb) addition on the microstructural stability and 750 C-degrees /135 MPa stress rupture properties of a solid-solution strengthened Fe-Ni-based superalloy designed for fourth-generation (Gen IV) nuclear reactors was systematically studied. The results showed that the stress rupture life first increased and then decreased with the increase of Nb content. The alloy with the addition of 0.5 wt% Nb exhibited the best stress rupture properties, with a stress rupture life of 164 h. Compared to Nb-free alloy, the stress rupture life has been increased by 382 %. The enhanced creep performance of this alloy was closely related to its excellent high- temperature microstructural stability, which can be explained as follows: homogeneous and optimal grain size distribution, elemental Nb provided good solid-solution strengthening effects, fine granular secondary carbides relieved stress concentration and strengthened grain boundaries (GBs), dynamic precipitation of nano-sized NbC carbides effectively pined dislocations. Dynamic recrystallization (DRX) behavior can be observed in all alloys. The mechanisms related to DRX behavior were discussed, and it was deemed that the smaller average grain size, higher blocky NbC volume fraction, and increased stacking-fault energy (SFE) may be responsible for the facilitated DRX in the alloy with higher Nb content, which greatly caused local softening and consequently, decreasing the creep resistance of the alloy. Important guidance for the further design and development of gamma '-free Fe-Ni-based superalloys for Gen IV nuclear reactors with good high-temperature microstructural stability and creep performance could be summarized from the present study.
关键词	Fe-Ni-based superalloy Niobium Microstructural stability Stress rupture properties Precipitates
资助者	Joint Funds of the National Natural Science Foundation of China ; Science and Technology Innovation 2025 Major Project of Ningbo ; China Postdoctoral Science Foundation ; LingChuang Research Project of China National Nuclear Corporation
DOI	10.1016/j.jallcom.2024.176628
收录类别	SCI
语种	英语
资助项目	Joint Funds of the National Natural Science Foundation of China[U23A6016] ; Science and Technology Innovation 2025 Major Project of Ningbo[2022Z199] ; China Postdoctoral Science Foundation[2023M743570] ; LingChuang Research Project of China National Nuclear Corporation
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:001328204200001
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/321006/190376
专题	中国科学院金属研究所
通讯作者	Wu, Y. S.; Qin, X. Z.; Zhou, L. Z.
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 4.Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
推荐引用方式 GB/T 7714	Wang, J. Q.,Wu, J. R.,Guan, X. J.,et al. Tailoring microstructural stability and stress rupture properties of a solid-solution strengthened Fe-Ni-based superalloy via niobium addition[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,1008:15.
APA	Wang, J. Q..,Wu, J. R..,Guan, X. J..,Wu, Y. S..,Cheng, S. H..,...&Zhou, L. Z..(2024).Tailoring microstructural stability and stress rupture properties of a solid-solution strengthened Fe-Ni-based superalloy via niobium addition.JOURNAL OF ALLOYS AND COMPOUNDS,1008,15.
MLA	Wang, J. Q.,et al."Tailoring microstructural stability and stress rupture properties of a solid-solution strengthened Fe-Ni-based superalloy via niobium addition".JOURNAL OF ALLOYS AND COMPOUNDS 1008(2024):15.