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所属单位：材料科学与技术学院
发表刊物：JOURNAL OF LASER APPLICATIONS
关键字：laser beam welding electron beam welding Ti6Al4V titanium alloy finite element analysis
摘要：This paper reports a numerical and experimental investigation of laser beam welding (LBW) and electron beam welding (EBW) for the Ti6Al4V titanium alloy. The microstructure of LBW and EBW welded joints is compared. A defect-free, fine-grain, and high-quality joint is produced using the EBW process, while undercut and some pores are observed in the LBW welded joint. The simulated temperature distribution and the cross section of the experimental specimen are compared to evaluate the model validity. The calibrated model is applied to determine the thermal cycles on three selected nodes for both LBW and EBW processes. It is observed that the energy density of the electron beam is higher than that of the laser beam, which causes the weld-seam width of the EBW to be larger than that of the LBW weld seam. Narrow weld-seam, fine grain, and no defect make the EBW a more suitable method to join Ti6Al4V titanium sheets compared with the LBW process. (C) 2017 Laser Institute of America.
ISSN号：1042-346X
是否译文：否
发表时间：2017-02-01
合写作者：刘云鹏,Liu, Junjie,Meng, Yao,魏艳红,Yang, Jiankai,Liu, Xiangbo
通讯作者：占小红