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WELDING RESEARCH Effects of Temporal Pulse Shaping on ...

WELDING RESEARCHJANUARY 2008, VOL. 87-s18 ABSTRACT. Pulsed laser beam welds of6061-T6 aluminum alloy hermetic pack-ages for encapsulation of sensitive elec-tronic and optoelectronic componentstypically exhibit severe solidificationcracking when a conventional rectangularor on/off laser Pulse is employed. In thisstudy, the Effects of Temporal Pulse shap-ing on the solidification cracking suscepti-bility of Nd:YAG pulsed laser welds madein 6061-T6 aluminum were results showed that it was possible toeliminate solidification cracking in 6061-T6 pulsed Nd:YAG laser seam welds bydecreasing the ramp-down gradient of thelaser Pulse power after the main weldingpulse sector.

Lincoln Electric, China. D. C. WECKMAN and Y. ZHOU are with Department of Mechanical and Mechatronics Engineering, University of Water-loo, Waterloo, Ont., Canada. ... cation cracking is influenced by the weld metal composition, the welding process and weld process parameters used, and

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  Electric, Weld, Lincoln, Lincoln electric, Cracking

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