Effects of Nb addition and heat treatment on the microstructure, mechanical property and internal friction behavior of FeCrAlMo cladding alloys

doi:10.1016/j.jnucmat.2022.154044

	Effects of Nb addition and heat treatment on the microstructure, mechanical property and internal friction behavior of FeCrAlMo cladding alloys
	Wang, H.1,2; Gao, Y. X.3; Sun, M.; Li, G.2; He, K.2; An, X. G.1; Jiang, W. B.3; Fang, Q. F.; Wang, X. P.
刊名	JOURNAL OF NUCLEAR MATERIALS
	2022-12-15
卷号	572
关键词	Nb containing fecralmo alloys Internal friction Laves phase Pinning effect Strengthening mechanism
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2022.154044
通讯作者	Gao, Y. X.(yxgao@issp.ac.cn)
英文摘要	FeCrAl based alloy was a good candidate as an accident tolerant fuel (ATF) cladding material, this research investigated the influence of Nb addition and heat treatment on the evolution of dispersed Fe 2 Nb precipitates, the mechanical property and Internal Friction (IF) behavior of Nb containing Fe-13Cr-4.5Al2Mo alloys. Fe-13Cr-4.5Al-2Mo-1.5Nb (wt%) annealed at 10 0 0 & DEG;C exhibited the highest ultimate tensile strength (UTS) and an acceptable ductility at each tested temperature (room temperature, 300 & DEG;C, 500 & DEG;C or 800 & DEG;C). For example, the UTS of FeCrAlMo-1.5 wt% Nb at 800 & DEG;C was 95 MPa, 73% higher than that of Nb-free FeCrAlMo alloy at the same test temperature. Comparing with IF results of the cold-rolled Nbfree FeCrAlMo alloy in the first heating cycle, a high IF peak ( & SIM;P 2 ) located at about 680 & DEG;C disappeared in the Nb containing FeCrAlMo alloy. Based on the optical micrographs analysis, the reason may be the pinning effect by the high density nanoscale Fe 2 Nb particles on dislocations, P 2 peak would be expected to find at higher temperature; Likewise, the disappearance of P 3 in the Nb containing FeCrAlMo alloys proved the pinning effect of Fe 2 Nb particles on grain boundaries. Based on the IF theory and microstructure characterization, the disappearance of P 2 (recrystallization peak) and P 3 (grain boundary peak) in the Nb containing FeCrAlMo alloys well proved that this pinning effect by high density Fe 2 Nb nanoscale particles was the main reason for improving the tensile strength of the Nb containing FeCrAlMo alloys. (c) 2022 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[51801194] ; National Natural Science Foundation of China[U1967211] ; National Natural Science Foundation of China[52122103]
WOS关键词	CR-AL ALLOYS ; PHASE ; DEFORMATION ; STABILITY ; STRENGTH
WOS研究方向	Materials Science ; Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000886081400002
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131667]
专题	中国科学院合肥物质科学研究院
通讯作者	Gao, Y. X.
作者单位	1.Chengdu Univ, Inst Adv Study, Interdisciplinary Mat Res Ctr, Chengdu 610106, Peoples R China 2.Nucl Power Inst China, Sci & Technol Reactor Fuel & Mat Lab, Chengdu 610041, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Wang, H.,Gao, Y. X.,Sun, M.,et al. Effects of Nb addition and heat treatment on the microstructure, mechanical property and internal friction behavior of FeCrAlMo cladding alloys[J]. JOURNAL OF NUCLEAR MATERIALS,2022,572.
APA	Wang, H..,Gao, Y. X..,Sun, M..,Li, G..,He, K..,...&Wang, X. P..(2022).Effects of Nb addition and heat treatment on the microstructure, mechanical property and internal friction behavior of FeCrAlMo cladding alloys.JOURNAL OF NUCLEAR MATERIALS,572.
MLA	Wang, H.,et al."Effects of Nb addition and heat treatment on the microstructure, mechanical property and internal friction behavior of FeCrAlMo cladding alloys".JOURNAL OF NUCLEAR MATERIALS 572(2022).