Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys

doi:10.1016/j.matchar.2022.111779

IMECH-IR > 非线性力学国家重点实验室

	Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys
	Tan S(覃双)1 ; Yang MX(杨沐鑫)1 ; Jiang P(姜萍)1 ; Yuan FP(袁福平)1,2 ; Wu XL(武晓雷)1,2
通讯作者	Yuan, Fuping([email protected])
发表期刊	MATERIALS CHARACTERIZATION
	2022-04-01
卷号	186 页码:13
ISSN	1044-5803
摘要	Both heterogeneous grain structure and dual nanoprecipitates (B2 and L12) have been designed and obtained in a FCC-based Al0.5Cr0.9FeNi2.5V0.2 high entropy alloy (HEA). The volume fraction of B2 phase is nearly unchanged, while the average size and volume fraction for L12 particles become larger after aging, resulting in a more severe heterogeneity. The aged samples display a better synergy of strength and ductility than the corresponding unaged samples. The aged samples show a transient up-turn strain hardening behavior and a higher hardening rate as compared to the corresponding unaged samples. The hetero-deformation-induced hardening plays a more important role in the aged samples than in the unaged samples, producing higher density of geometrically necessary dislocations for better tensile properties. Orowan-type bowing hardening and shearing hardening mechanisms are observed for B2 and L12 nano-particles, respectively. The size and interspacing of B2 and L12 particles are at nanometer scale, which should be very effective on hardening and strengthening by accumulating dislocations at phase interfaces. A theoretical analysis based on dislocation strengthening, grain boundary strengthening, Orowan-type bowing strengthening of B2 nano-particles, shearing strengthening of L12 nanoparticles and strengthening of chemical short-range order has been found to provide well prediction on strength.
关键词	High-entropy alloys Heterogeneous structures Precipitates Strain hardening Strengthening Ductility
DOI	10.1016/j.matchar.2022.111779
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000808907600001
关键词[WOS]	SHORT-RANGE ORDER ; STRAIN-GRADIENT PLASTICITY ; ULTRA-HIGH STRENGTH ; MECHANICAL-PROPERTIES ; LATTICE DISTORTION ; THERMAL-STABILITY ; DEFORMATION ; DUCTILITY ; CRCONI ; BEHAVIOR
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
资助项目	National Key R&D Program of China[2017YFA0204402] ; NSFC Basic Science Center Program[11988102] ; National Natural Science Foundation of China[11790293] ; National Natural Science Foundation of China[52192591] ; fellowship of China Post-doctoral Science Foundation[2021M703292] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
项目资助者	National Key R&D Program of China ; NSFC Basic Science Center Program ; National Natural Science Foundation of China ; fellowship of China Post-doctoral Science Foundation ; Strategic Priority Research Program of the Chinese Academy of Sciences
论文分区	一类
力学所作者排名	1
RpAuthor	Yuan, Fuping
引用统计	被引频次：22[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/89655
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tan S,Yang MX,Jiang P,et al. Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys[J]. MATERIALS CHARACTERIZATION,2022,186:13.Rp_Au:Yuan, Fuping
APA	覃双,杨沐鑫,姜萍,袁福平,&武晓雷.(2022).Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys.MATERIALS CHARACTERIZATION,186,13.
MLA	覃双,et al."Excellent tensile properties induced by heterogeneous grain structure and dual nanoprecipitates in high entropy alloys".MATERIALS CHARACTERIZATION 186(2022):13.

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