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Thin plate gap bridging study for Nd:YAG pulsed laser lap welds

Norris, J.T.; Roach, R.A.; Fuerschbach, Phillip W.; Bernal, J.

Gap bridging of thin plate pulsed Nd:YAG lap welds is optimized by focused welding at low peak powers without gas shielding. High speed images reveal effects of varying welding parameters and weld pool and laser beam interactions. Improved bridging with out gas shielding is attributed to changes in Marangoni convective flow. Development and verification of finite element models for weld pool physics is being conducted. Copyright © 2006 ASM International®.