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

doi:10.1016/j.ijfatigue.2025.108811

IMECH-IR > 非线性力学国家重点实验室

	Enhancing fatigue performance of laser powder bed fused metals through controlling contour parameters and structures
	Zhang, Hongzhuang 1,2; Li, Changyou 1; Cao, Shujie 1; Sergeichev, Ivan 3; Qian GA(钱桂安)4
通讯作者	Zhang, Hongzhuang([email protected]) ; Qian, Guian([email protected])
发表期刊	INTERNATIONAL JOURNAL OF FATIGUE
	2025-04-01
卷号	193 页码:17
ISSN	0142-1123
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.
关键词	Laser powder bed fusion Contour scanning Surface defects Fatigue performance Damage mechanism
DOI	10.1016/j.ijfatigue.2025.108811
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001398884200001
关键词[WOS]	316L STAINLESS-STEEL ; SURFACE-ROUGHNESS ; RESIDUAL-STRESS ; FUSION ; MECHANISMS ; STRENGTH ; BEHAVIOR ; SLM
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
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]
项目资助者	National Natural Science Foundation of China ; Joint Fund of Natural Science Foundation of Liaoning Province ; Fundamental Research Funds for the Central Universities
论文分区	一类
力学所作者排名	1
RpAuthor	Zhang, Hongzhuang ; Qian, Guian
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/98199
专题	非线性力学国家重点实验室
作者单位	1.Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Peoples R China; 2.Northeastern Univ, Liaoning Prov Key Lab High end Equipment Intellige, Shenyang 110819, Peoples R China; 3.Skolkovo Inst Sci & Technol, Ctr Mat Technol, Moscow 121205, Russia; 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, 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.Rp_Au:Zhang, Hongzhuang, Qian, Guian
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.