Effects of defects and microstructures on tensile properties of selective laser melted Ti6Al4V alloys fabricated in the optimal process zone

doi:10.1016/j.msea.2021.142294

IMR OpenIR

	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
通讯作者	Yang, H. J.(hjyang@imr.ac.cn) ; Ji, H. B.(hbji@imr.ac.cn) ; Zhang, Z. F.(zhfzhang@imr.ac.cn)
	2022-01-07
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	830 页码:9
摘要	The 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.
关键词	Selective laser melting Ti6Al4V Optimization Defects Microstructure
资助者	National 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
DOI	10.1016/j.msea.2021.142294
收录类别	SCI
语种	英语
资助项目	National 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研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000718392500002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：34[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/167394
专题	中国科学院金属研究所
通讯作者	Yang, H. J.; Ji, H. B.; Zhang, Z. F.
作者单位	1.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
推荐引用方式 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.