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Enhancing fatigue performance of laser powder bed fused metals through controlling contour parameters and structures

文献类型：期刊论文

作者Zhang, Hongzhuang3,4; Li, Changyou4; Cao, Shujie4; Sergeichev, Ivan2; Qian GA(钱桂安)1
刊名INTERNATIONAL JOURNAL OF FATIGUE
出版日期2025-04-01
卷号193页码:17
关键词Laser powder bed fusion Contour scanning Surface defects Fatigue performance Damage mechanism
ISSN号0142-1123
DOI10.1016/j.ijfatigue.2025.108811
通讯作者Zhang, Hongzhuang(zhanghz@mail.neu.edu.cn) ; Qian, Guian(qianguian@imech.ac.cn)
英文摘要Side surface quality is a critical concern in the fatigue performance of laser powder bed fused (PBF-LB) components. Increasing contour passes with customized parameters along sample edge can tune side surface/subsurface quality and thereby enhance fatigue resistance. This study critically evaluates the surface and subsurface characteristics resulting from varying contour parameters and their impact on the fatigue performance of PBF-LB 304L steel through multiple detailed characterizations. The fatigue damage mechanisms for varying contour parameters are investigated through fatigue fractography, temperature field analysis, and microstructural evolution. Results indicate that optimal contour parameters differed from infill parameters due to the energy absorption from powder fusion and solidification remelting. The contour defects, including spherical vapor cavities and irregular lack-of-fusion (LoF) defects resulting from inappropriate parameters, significantly degrade fatigue lifetime due to their high-stress concentration factors. Appropriate contour parameters (approximately 300 J/ mm3 in energy density) can minimize defect content while simultaneously enhancing microstructural heterogeneity in the contour region. The identified physical mechanisms of defect formation and fatigue damage will assist in designing and optimizing contour process for enhancing fatigue performance.
分类号一类
WOS关键词316L STAINLESS-STEEL ; SURFACE-ROUGHNESS ; RESIDUAL-STRESS ; FUSION ; MECHANISMS ; STRENGTH ; BEHAVIOR ; SLM
资助项目National Natural Science Foundation of China[12272090] ; National Natural Science Foundation of China[12402082] ; Joint Fund of Natural Science Foundation of Liaoning Province[2023-BSBA-138] ; Fundamental Research Funds for the Central Universities[N2403024]
WOS研究方向Engineering ; Materials Science
语种英语
WOS记录号WOS:001398884200001
资助机构National Natural Science Foundation of China ; Joint Fund of Natural Science Foundation of Liaoning Province ; Fundamental Research Funds for the Central Universities
其他责任者Zhang, Hongzhuang ; Qian, Guian
源URL[http://dspace.imech.ac.cn/handle/311007/98198]  
专题力学研究所_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 LNM, Beijing 100190, Peoples R China
2.Skolkovo Inst Sci & Technol, Ctr Mat Technol, Moscow 121205, Russia;
3.Northeastern Univ, Liaoning Prov Key Lab High end Equipment Intellige, Shenyang 110819, Peoples R China;
4.Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Peoples R China;
推荐引用方式
GB/T 7714		 Zhang, Hongzhuang,Li, Changyou,Cao, Shujie,et al. Enhancing fatigue performance of laser powder bed fused metals through controlling contour parameters and structures[J]. INTERNATIONAL JOURNAL OF FATIGUE,2025,193:17.
APA Zhang, Hongzhuang,Li, Changyou,Cao, Shujie,Sergeichev, Ivan,&钱桂安.(2025).Enhancing fatigue performance of laser powder bed fused metals through controlling contour parameters and structures.INTERNATIONAL JOURNAL OF FATIGUE,193,17.
MLA Zhang, Hongzhuang,et al."Enhancing fatigue performance of laser powder bed fused metals through controlling contour parameters and structures".INTERNATIONAL JOURNAL OF FATIGUE 193(2025):17.

入库方式： OAI收割

来源：力学研究所

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