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Humping Formation and Suppression in High-Speed Laser Welding
| Content Provider | MDPI |
|---|---|
| Author | Xue, Boce Chang, Baohua Wang, Shenghua Hou, Runshi Wen, Peng Du, Dong |
| Copyright Year | 2022 |
| Description | Increasing welding speed can promote the productivity of laser welding. However, humping defects often occur, which limits the application of this strategy. The existing explanations for the humping formation remain vague, and mitigation and suppression methods are limited. In this research, high-speed imaging experiments and numerical simulation of the high-speed laser welding process are performed. Through careful examination, the humping phenomenon is explained. At high welding speed, the high-speed melt flow caused by recoil pressure is hindered by the solidified region in the melt pool, leading to the occurrence of a swelling. The swelling then grows, forming a valley in front of the swelling under the effect of surface tension. The solidification of the valley results in the occurrence of a second swelling. This process repeats and humping defect forms. Marangoni force and viscous force also have influence on this process. In addition, it is found that adding a Tungsten Inert Gas arc behind the laser beam can effectively suppress the humping. |
| Starting Page | 2420 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma15072420 |
| Journal | Materials |
| Issue Number | 7 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-03-25 |
| Access Restriction | Open |
| Subject Keyword | Materials Manufacturing Engineering High-speed Laser Welding Humping Numerical Simulation High-speed Imaging Tig Arc |
| Content Type | Text |
| Resource Type | Article |
