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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)1; Zheng L2; Hong YS(洪友士)1
Corresponding AuthorZheng, Liang(icon_lzheng@hit.edu.cn) ; Hong, Youshi(hongys@imech.ac.cn)
Source PublicationFATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
2020-10-04
Pages17
ISSN8756-758X
AbstractOrthogonal 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.
Keywordorthogonal experiment design processing parameters selective laser melting Ti-6Al-4V very-high-cycle fatigue
DOI10.1111/ffe.13361
Indexed BySCI ; EI
Language英语
WOS IDWOS:000574772400001
WOS KeywordADDITIVELY MANUFACTURED TI-6AL-4V ; CRACK INITIATION ; MECHANICAL-PROPERTIES ; TITANIUM-ALLOY ; MICROSTRUCTURE ; OPTIMIZATION ; PREDICTION ; DEPOSITION ; STRENGTH ; POROSITY
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Multidisciplinary
Funding ProjectChinese Academy of Sciences[XDB22040503] ; Chinese Academy of Sciences[XDB22020201] ; National Natural Science Foundation of China[11932020]
Funding OrganizationChinese Academy of Sciences ; National Natural Science Foundation of China
Classification二类/Q1
Ranking1
ContributorZheng, Liang ; Hong, Youshi
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/85313
Collection非线性力学国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China;
2.Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China
Recommended Citation
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.
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