Simultaneous Improvement of Yield Strength and Ductility at Cryogenic Temperature by Gradient Structure in 304 Stainless Steel

doi:10.3390/nano11071856

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Simultaneous Improvement of Yield Strength and Ductility at Cryogenic Temperature by Gradient Structure in 304 Stainless Steel
	Tan S(覃双)2; Yang MX(杨沐鑫)2; Yuan FP(袁福平)1,2; Wu XL(武晓雷)1,2
刊名	NANOMATERIALS
	2021-07-01
卷号	11 期号:7 页码:12
关键词	gradient structure ductility strain hardening martensitic transformation hetero-de-formation-induced hardening
DOI	10.3390/nano11071856
通讯作者	Yang, Muxin(mxyang@lnm.imech.ac.cn) ; Yuan, Fuping(fpyuan@lnm.imech.ac.cn)
英文摘要	The tensile properties and the corresponding deformation mechanism of the graded 304 stainless steel (ss) at both room and cryogenic temperatures were investigated and compared with those of the coarse-grained (CGed) 304 ss. Gradient structures were found to have excellent synergy of strength and ductility at room temperature, and both the yield strength and the uniform elongation were found to be simultaneously improved at cryogenic temperature in the gradient structures, as compared to those for the CG sample. The hetero-deformation-induced (HDI) hardening was found to play a more important role in the gradient structures as compared to the CG sample and be more obvious at cryogenic temperature as compared to that at room temperature. The central layer in the gradient structures provides stronger strain hardening during tensile deformation at both temperatures, due to more volume fraction of martensitic transformation. The volume fraction of martensitic transformation in the gradient structures was found to be much higher at cryogenic temperature, resulting in a much stronger strain hardening at cryogenic temperature. The amount of martensitic transformation at the central layer of the gradient structures is observed to be even higher than that for the CG sample at cryogenic temperature, which is one of the origins for the simultaneous improvement of strength and ductility by the gradient structures at cryogenic temperature.
分类号	二类/Q1
资助项目	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics[11988102] ; National Key R&D Program of China[2017YFA0204402] ; National Natural Science Foundation of China[52071326] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040503]
WOS关键词	AUSTENITIC STAINLESS-STEEL ; MECHANICAL-PROPERTIES ; MARTENSITE FORMATION ; DISLOCATION DENSITY ; DEFORMATION ; PLASTICITY ; TENSILE ; METALS ; MICROSTRUCTURES ; STABILIZATION
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000676853900001
资助机构	NSFC Basic Science Center Program for Multiscale Problems in Nonlinear Mechanics ; National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences
其他责任者	Yang, Muxin ; Yuan, Fuping
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/87071]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 2.Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, 15 Beisihuan West Rd, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Tan S,Yang MX,Yuan FP,et al. Simultaneous Improvement of Yield Strength and Ductility at Cryogenic Temperature by Gradient Structure in 304 Stainless Steel[J]. NANOMATERIALS,2021,11(7):12.
APA	覃双,杨沐鑫,袁福平,&武晓雷.(2021).Simultaneous Improvement of Yield Strength and Ductility at Cryogenic Temperature by Gradient Structure in 304 Stainless Steel.NANOMATERIALS,11(7),12.
MLA	覃双,et al."Simultaneous Improvement of Yield Strength and Ductility at Cryogenic Temperature by Gradient Structure in 304 Stainless Steel".NANOMATERIALS 11.7(2021):12.