| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7176947 | Journal of Materials Processing Technology | 2015 | 7 Pages |
Abstract
The effects of beam oscillating parameters on weld morphologies are investigated. Weld geometrical sizes were counted statistically. The results showed that the difference in cross-section width from the top to the lower gradually reduced to disappear with the increase of oscillating frequency. Weld cross-section was featured by slender nail when the frequency was 10Â Hz or so, which was similar with conventional laser keyhole weld. It changed to dumpy nail, V-shape and U-shape in sequence with the increase of the frequency within the range from 20Â Hz to 1000Â Hz. The welding speed thresholds transforming the welding from keyhole mode to unstable mode and from unstable mode to heat conduction mode were confirmed as 24Â m/min and 48Â m/min, respectively. Weld formation mechanisms were summarized by weld overlapping ratio and the transformation of welding mode.
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Authors
Kangda Hao, Geng Li, Ming Gao, Xiaoyan Zeng,