The Influence of Metastable Cellular Structure on Deformation Behavior in Laser Additively Manufactured 316L Stainless Steel

doi:10.3390/nano11112859

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	The Influence of Metastable Cellular Structure on Deformation Behavior in Laser Additively Manufactured 316L Stainless Steel
	Li N(李娜)1; Li ZY(李正阳)1 ; Wei YJ(魏宇杰)1,2
通讯作者	Wei, Yujie(yujie_wei@lnm.imech.ac.cn)
发表期刊	NANOMATERIALS
	2021-11-01
卷号	11 期号:11 页码:13
摘要	Metastable cellular structures (MCSs) play a crucial role for the mechanical performance in concentrated alloys during non-equilibrium solidification process. In this paper, typifying the heterogeneous 316L stainless steel by laser additive manufacturing (LAM) process, we examine the microstructures in cellular interiors and cellular boundaries in detail, and reveal the interactions of dislocations and twins with cellular boundaries. Highly ordered coherent precipitates present along the cellular boundary, resulting from spinodal decomposition by local chemical fluctuation. The co-existences of precipitates and high density of tangled dislocations at cellular boundaries serve as walls for extra hardening. Furthermore, local chemical fluctuation in MCSs inducing variation in stacking fault energy is another important factor for ductility enhancement. These findings shed light on possible routines to further alter nanostructures, including precipitates and dislocation structures, by tailoring local chemistry in MCSs during LAM.
关键词	laser additive manufacturing metastable cellular structures 316L stainless steel coherent precipitates stacking fault energy
DOI	10.3390/nano11112859
收录类别	SCI
语种	英语
WOS记录号	WOS:000724847200001
关键词[WOS]	STACKING-FAULT ENERGY ; HIGH-ENTROPY ALLOYS ; HIGH-STRENGTH ; SPINODAL DECOMPOSITION ; MICROSTRUCTURAL EVOLUTION ; MECHANICAL-PROPERTIES ; DISLOCATION ; SEGREGATION ; SHEARING ; DENSITY
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
资助项目	Multiscale Problems in Nonlinear Mechanics[11988102] ; Multiscale Problems in Nonlinear Mechanics[11790291] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22020200]
项目资助者	Multiscale Problems in Nonlinear Mechanics ; Strategic Priority Research Program of the Chinese Academy of Sciences
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Wei, Yujie
引用统计	被引频次：4[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/311007/88050
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li N,Li ZY,Wei YJ. The Influence of Metastable Cellular Structure on Deformation Behavior in Laser Additively Manufactured 316L Stainless Steel[J]. NANOMATERIALS,2021,11,11,:13.
APA	李娜,李正阳,&魏宇杰.(2021).The Influence of Metastable Cellular Structure on Deformation Behavior in Laser Additively Manufactured 316L Stainless Steel.NANOMATERIALS,11(11),13.
MLA	李娜,et al."The Influence of Metastable Cellular Structure on Deformation Behavior in Laser Additively Manufactured 316L Stainless Steel".NANOMATERIALS 11.11(2021):13.

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