Product Code: ICAL09_405

Study on Welding of 2024 Aluminum Alloy Sheet with Disc Laser
Authors:
Xudong Zhao, Beijing University of Technology; Beijing Peoples Republic of China
Rongshi Xiao, Beijing University of Technology; Beijing Peoples Republic of China
Kai Chen, Beijing University of Technology; Beijing Peoples Republic of China
Presented at ICALEO 2009

In the fields of medical equipment manufacturing and aerospace engineering, aluminum alloys are widely applied to make the shells of the electronic devices. Laser welding is considered as a suitable technology to produce those components for the lower heat input and higher joint strength. In this paper, a 4.0kW disc laser was used to weld 2024 aluminum alloy sheet with a thickness of 1mm. The difference of the weld formation with and without filler powder was discussed. The behavior of powder in welding was analyzed by high speed video. The experimental results show that the weld depth changes in U-shape with the increasing of the defocusing distance in welding with filler powder, while the weld depth decreases drastically in autogeneous welding. The high speed video observation demonstrates that the weld pool size is enlarged with the powder filling, which indicates more laser energy is absorbed.