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Heterogeneous microstructures by combining laser additive manufacturing with auxiliary ultrasound field for strength-ductility betterment

文献类型：期刊论文

作者Li, Na2,3; Lei, Xianqi2; Li, Yuqiong2,3; Wei, Yujie1,2
刊名INTERNATIONAL JOURNAL OF PLASTICITY
出版日期2025-11-01
卷号194页码:17
关键词Laser additive manufacturing Heterogenization Auxiliary ultrasound field Combined hierarchically microstructure Strength-ductility
ISSN号0749-6419
DOI10.1016/j.ijplas.2025.104481
通讯作者Li, Yuqiong(liyuqiong@imech.ac.cn) ; Wei, Yujie(yujie_wei@lnm.imech.ac.cn)
英文摘要Heterogenization is broadly employed to metallic alloys to improve their strength and ductility. In the current work, taking advantage of layer-wise melting by laser additive manufacturing (LAM) and grain refinement by auxiliary ultrasound field (USF), we combine LAM with USF to realize heterogeneous structures in 316 L stainless steel (SS). The as-built heterogeneous 316 L SS exhibits hierarchical microstructures spanning multiple length scales, ranging from millimeter-sized grains and micrometer-scale intragranular cellular domains down to nanoparticles of Fe-Cr sigma-phase and L1(2) precipitates heterogeneously dispersed within the cellular matrix. This unique spatial distribution of microstructures with a broad size-span and chemical fluctuations give rise to an ultra-high tensile strength in heterogeneous 316 L SS with a ultimate strength up to 1 GPa and an elongation of similar to 12.5 %. We further reveal that the synergy effect from hierarchical twins and metastable cells on dislocation gliding gives rise to the superior strength-ductility performance. The demonstration of using LAM with auxiliary USF to achieve controllable hierarchical heterogeneous microstructure paves a practical way for microstructure design and manufacturing.
WOS关键词HIGH-ENTROPY ALLOY ; STAINLESS-STEEL ; TENSILE PROPERTIES ; GRADIENT ; 316L ; CRACKING ; STRESS ; DESIGN
资助项目NSFC Basic Science Center for Multiscale Problems in Nonlinear Mechanics[12588201] ; National Natural Science Foundation of China[12302109]
WOS研究方向Engineering ; Materials Science ; Mechanics
语种英语
WOS记录号WOS:001578647000001
资助机构NSFC Basic Science Center for Multiscale Problems in Nonlinear Mechanics ; National Natural Science Foundation of China
源URL[http://dspace.imech.ac.cn/handle/311007/104041]  
专题力学研究所_非线性力学国家重点实验室
通讯作者Li, Yuqiong; Wei, Yujie
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Key Lab Mech Fluid Solid Coupling Syst, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Li, Na,Lei, Xianqi,Li, Yuqiong,et al. Heterogeneous microstructures by combining laser additive manufacturing with auxiliary ultrasound field for strength-ductility betterment[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2025,194:17.
APA Li, Na,Lei, Xianqi,Li, Yuqiong,&Wei, Yujie.(2025).Heterogeneous microstructures by combining laser additive manufacturing with auxiliary ultrasound field for strength-ductility betterment.INTERNATIONAL JOURNAL OF PLASTICITY,194,17.
MLA Li, Na,et al."Heterogeneous microstructures by combining laser additive manufacturing with auxiliary ultrasound field for strength-ductility betterment".INTERNATIONAL JOURNAL OF PLASTICITY 194(2025):17.

入库方式： OAI收割

来源：力学研究所

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