@inproceedings{032cbd8dc19f4b318f3f08e3186580df,
title = "Effects of gap width on droplet transfer behavior in ultra-narrow gap laser welding of high strength aluminum alloys",
abstract = "Ultra-narrow gap laser welding is a novel method for thick high strength aluminum alloy plate for its lower heat input, less deformation and higher efficiency. To obtain a perfect welding quality, it is vital to control the more complex droplet transfer behavior under the influence of ultra-narrow gap groove. This paper reports the effects of gap width of groove on droplet transfer behavior in ultra-narrow gap laser welding of 7A52 aluminum alloy plates by a high speed camera, using an ER 5356 filler wire. The results showed that the gap width had directly effects on droplet transfer mode and droplet shape. The droplet transfer modes were, in order, both-sidewall transfer, single-sidewall transfer, globular droplet transfer and bridging transfer, with different droplet shape and transition period, as the gap width increased from 2 mm to 3.5mm. The effect of gap width on lack of fusion was also studied to analyze the cause for lack of fusion at the bottom and on the sidewall of groove. Finally, with a 2.5 mm U-type parallel groove, a single-pass joint with no lack of fusion and other macro welding defects was successfully obtained in a single-sidewall transfer mode.",
keywords = "Laser welding, droplet transfer, high strength aluminum alloys, narrow gap",
author = "Chaoqun Song and Shiyun Dong and Shixing Yan and Jiawu He and Binshi Xu and Peng He",
note = "Publisher Copyright: {\textcopyright} 2017 SPIE.; Applied Optics and Photonics China: Laser Components, Systems, and Applications, AOPC 2017 ; Conference date: 04-06-2017 Through 06-06-2017",
year = "2017",
doi = "10.1117/12.2283475",
language = "英语",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Long Zhang and Lan Jiang and Shibin Jiang and Lijun Wang",
booktitle = "AOPC 2017",
address = "美国",
}