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	Dimensional characteristics of Ti-6Al-4V thin-walled parts prepared by wire-based multi-laser additive manufacturing in vacuum
	Du, Farui1,2; Zhu, Jinqian2,3,4; Ding, Xueping2,4; Zhang, Qi2,4; Ma, Honglin2,4; Yang, Jie2,4; Cao, Hongzhong2,4; Ling, Zemin2,4; Wang, Guoyu2,4; Duan, Xuanming2,4
	2019-06-10
摘要	Purpose A wire-based additive manufacturing system works with high manufacturing efficiency and low dimensional precision. The purpose of this paper is to study the dimensional characteristics of Ti-6Al-4V thin-walled parts with wire-based multi-laser additive manufacturing in vacuum. Design/methodology/approach Wire-based multi-laser additive manufacturing was carried out to understand the effect brought from different parameters. The Ti-6Al-4V thin-walled parts were formed by different height increments, power inputs and inter-layer cooling times in vacuum. Findings The result shows that, with the number of layers increment, the layer width of thin-walled part increases gradually in the beginning and stabilizes soon afterward. Height increment, laser power and inter-layer cooling time could affect the energy input to the deposited bead and heat accumulation of thin-walled part. The layer width decreases, while the height increment increases. The increment of laser power could increase the layer width. And, the increment of inter-layer cooling time (more than 5 s) has little effect on the layer width. Originality/value The heat dissipation mode of thin-walled parts in vacuum and the influence of different parameters on layer width are explained in this paper. It provides a reference for further understanding and controlling dimension precision of Ti-6Al-4V thin-walled part with wire-based multi-laser additive manufacturing in vacuum. At the same time, it provides a reference for researches of dimensional characteristics in the additive manufacturing industry.
关键词	Additive manufacturing Vacuum Ti-6Al-4V Dimensional characteristic Layer width Thin-walled part
DOI	10.1108/RPJ-08-2018-0207
发表期刊	RAPID PROTOTYPING JOURNAL
ISSN	1355-2546
卷号	25期号:5页码:849-856
收录类别	SCI
WOS记录号	WOS:000482075900006
语种	英语