کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
798148 903216 2013 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Two-pass laser welding of galvanized high-strength dual-phase steel for a zero-gap lap joint configuration
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
Two-pass laser welding of galvanized high-strength dual-phase steel for a zero-gap lap joint configuration
چکیده انگلیسی

A welding procedure based on using two-pass laser scans is introduced for joining overlapped galvanized high-strength steel sheets. The first pass is based on a defocused laser spot that scans across the top of the overlapped sheets and heats the zinc coating at the faying surface to be melted and vaporized, while the second pass is executed with a focused laser spot in order to perform the welding. Completely defect-free welds were obtained by using this two-pass laser welding procedure. An on-line machine vision system and a spectrometer were applied to analyze the stability of the laser welding process. An energy-dispersive X-ray spectroscopy (EDS) was carried out to determine the atomic percent of zinc and iron of the DP980 coupons. Mechanical testing was conducted to evaluate the mechanical properties of the welds. The experimental results show that the weld joints obtained by the two-pass laser welding approach have a higher failure value than those obtained by a single pass laser welding of galvanized steel with mechanically removed zinc at the faying surface under the same welding speed and laser power.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 213, Issue 3, March 2013, Pages 495–507
نویسندگان
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