Influence of processing parameters of selective laser melting on high-cycle and very-high-cycle fatigue behaviour of Ti-6Al-4V

doi:10.1111/ffe.13361

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	Influence of processing parameters of selective laser melting on high-cycle and very-high-cycle fatigue behaviour of Ti-6Al-4V
	Du LM(杜雷鸣)1,2; Qian GA(钱桂安)2; Zheng L 1; Hong YS(洪友士)2
刊名	FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
	2020-10-04
页码	17
关键词	orthogonal experiment design processing parameters selective laser melting Ti-6Al-4V very-high-cycle fatigue
ISSN号	8756-758X
DOI	10.1111/ffe.13361
通讯作者	Zheng, Liang(icon_lzheng@hit.edu.cn) ; Hong, Youshi(hongys@imech.ac.cn)
英文摘要	Orthogonal experiment design together with the analysis of variance was used to examine the processing parameters (laser power, scan speed, layer thickness and hatch spacing) of selective laser melting (SLM) for superior properties of SLM parts, in which nine groups of specimens of Ti-6Al-4V were fabricated. The results clarify that the influence sequence of individual parameter on the porosity is laser power > hatch spacing > layer thickness > scan speed. Ultrasonic fatigue tests (20 kHz) were conducted for the SLMed specimens in high-cycle fatigue (HCF) and very-high-cycle fatigue (VHCF) regimes. TheS-Ndata show that the fatigue strength is greatly affected by the porosity: the group with the smallest porosity percentage having the highest fatigue strength in HCF and VHCF regimes. Then, the tests on the validation group were performed to verify the optimal combination of SLM processing parameters. Moreover, the observations by scanning electron microscopy revealed that fatigue cracks initiate at lack-of-fusion defects in the cases of surface and internal crack initiation.
分类号	二类/Q1
资助项目	Chinese Academy of Sciences[XDB22040503] ; Chinese Academy of Sciences[XDB22020201] ; National Natural Science Foundation of China[11932020]
WOS关键词	ADDITIVELY MANUFACTURED TI-6AL-4V ; CRACK INITIATION ; MECHANICAL-PROPERTIES ; TITANIUM-ALLOY ; MICROSTRUCTURE ; OPTIMIZATION ; PREDICTION ; DEPOSITION ; STRENGTH ; POROSITY
WOS研究方向	Engineering ; Materials Science
语种	英语
WOS记录号	WOS:000574772400001
资助机构	Chinese Academy of Sciences ; National Natural Science Foundation of China
其他责任者	Zheng, Liang ; Hong, Youshi
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/85312]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China 2.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Du LM,Qian GA,Zheng L,et al. Influence of processing parameters of selective laser melting on high-cycle and very-high-cycle fatigue behaviour of Ti-6Al-4V[J]. FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,2020:17.
APA	杜雷鸣,钱桂安,Zheng L,&洪友士.(2020).Influence of processing parameters of selective laser melting on high-cycle and very-high-cycle fatigue behaviour of Ti-6Al-4V.FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES,17.
MLA	杜雷鸣,et al."Influence of processing parameters of selective laser melting on high-cycle and very-high-cycle fatigue behaviour of Ti-6Al-4V".FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES (2020):17.