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Effects of defects and microstructures on tensile properties of selective laser melted Ti6Al4V alloys fabricated in the optimal process zone
Meng, L. X.1,2; Yang, H. J.1,2; Ben, D. D.1,2; Ji, H. B.1; Lian, D. L.1; Ren, D. C.1; Li, Y.1; Bai, T. S.1; Cai, Y. S.1; Chen, J.3; Yi, J. L.3; Wang, L.3; Yang, J. B.1,2; Zhang, Z. F.1,2
Corresponding AuthorYang, H. J.(hjyang@imr.ac.cn) ; Ji, H. B.(hbji@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
2022-01-07
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume830Pages:9
AbstractThe aim of selective laser melting (SLM) technology is to obtain high quality workpieces through optimization of processing parameters. However, the defects and microstructures are simultaneously changed with the change of process parameters, so their effects are hard to discuss separately. To meet this challenge, 24 combinations of laser power and scanning speed were designed to fabricate the SLM manufactured Ti6Al4V alloy, and the volumetric energy density (VED) of them ranges from 30 J/mm(3) to 100 J/mm(3). It is found that with the increase of VED the prior beta boundary tended to be straighter and wider, while the morphology of alpha lamella did no change distinctively. The porosity varies from nearly 0% to 4% in this process zone, which has significant effects on the tensile properties. For samples with high porosity (0.25%-4%), the influence of defects covered the influence of microstructure, leading to stochastic ultimate tensile strength and stably low elongation. For samples with low porosity (0.01%-0.25%) and extra-low porosity (<0.01%), the stably high ultimate tensile strength revealed the slight difference between microstructures. The poor productivity of elongation for samples with low and extra low porosity was also discussed.
KeywordSelective laser melting Ti6Al4V Optimization Defects Microstructure
Funding OrganizationNational Natural Science Foundation of China ; COMAC Shanghai Aircraft Manufacturing Co., Ltd ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Natural Science Foundation of Liaoning Province ; CAS Interdisciplinary Innovation Team
DOI10.1016/j.msea.2021.142294
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51975552] ; COMAC Shanghai Aircraft Manufacturing Co., Ltd[COMAC-SFGS-2018-2663] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2017235] ; Natural Science Foundation of Liaoning Province[2020-MS-007] ; CAS Interdisciplinary Innovation Team[JCTD-2020-10]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000718392500002
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167394
Collection中国科学院金属研究所
Corresponding AuthorYang, H. J.; Ji, H. B.; Zhang, Z. F.
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Chinese Acad Sci, Dept Mat Sci & Engn, Shenyang 110016, Peoples R China
3.COMAC Shanghai Aircraft Mfg Co Ltd, Shanghai 201324, Peoples R China
Recommended Citation
GB/T 7714
Meng, L. X.,Yang, H. J.,Ben, D. D.,et al. Effects of defects and microstructures on tensile properties of selective laser melted Ti6Al4V alloys fabricated in the optimal process zone[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,830:9.
APA Meng, L. X..,Yang, H. J..,Ben, D. D..,Ji, H. B..,Lian, D. L..,...&Zhang, Z. F..(2022).Effects of defects and microstructures on tensile properties of selective laser melted Ti6Al4V alloys fabricated in the optimal process zone.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,830,9.
MLA Meng, L. X.,et al."Effects of defects and microstructures on tensile properties of selective laser melted Ti6Al4V alloys fabricated in the optimal process zone".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 830(2022):9.
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