J. Phys. IV France 04 (1994) C4-179-C4-182
Investigation of welding depth with overlapping laser pulsesT. DASCALU, V. LUPEI, N. PAVEL and C. NEAGU
Institute of Atomic Physics, IFTAR-MALIRM, P.O. Box 5206, Bucharest 76900, Romania
Laser processing has became a valuable alternative to classical techniques in a large variety of technical applications : cutting, drilling, welding, etc. The development of laser metal processing techniques need a deep understanding of the basic physical phenomena, like temperature distribution and its evolution in a target during laser metal interaction. The heat conduction equation have been solved using a numerical method and the results are compared with penetration weld data obtained on tantal and stainless steel targets irradiated by a Nd:YAG laser with variable pulse width. Depending by pulses parameters (duration, rate of repetition, peak power, pulse-shape) and pulses overlapping the depth of weld has been investigated.
© EDP Sciences 1994