کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
5007693 1369175 2018 8 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Effect of laser pulse on alternative current arc discharge during laser-arc hybrid welding of magnesium alloy
کلمات کلیدی
Laser-arc hybrid welding; Laser pulse; Arc plasma discharge waveform;
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Effect of laser pulse on alternative current arc discharge during laser-arc hybrid welding of magnesium alloy
چکیده انگلیسی

•There are coupling effects between laser beam and AC arc discharge.•The welding arc draws out the Mg atoms in the keyhole in positive waveform.•Keyhole plasma constrains the arc discharge in negative waveform.

The coupling effect between a laser and arc plasma was studied in situations in which the laser acts at the positive and negative waveforms of the arc discharge during the laser-arc hybrid welding of magnesium alloy. Using the methods of direct observation, high speed imaging, and spectral analysis, the surface status of weld seams, weld penetration depths, plasma behavior, and spectral characteristics of welding plasma were investigated, respectively. Results show that, as compared with the laser pulse acting at the negative waveform of the arc plasma discharge, a better weld seam formation can be achieved when the laser pulse acts at the positive waveform of the arc discharge. At the same time, the radiation intensity of Mg atoms in the arc plasma increases significantly. However, the weld penetration depth is weaker. The findings show that when the laser pulse is acting at the negative waveform of the arc plasma discharge, the position of the arc plasma discharge on the workpiece can be restrained by the laser action point, which improves the energy density of the welding arc.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics and Lasers in Engineering - Volume 100, January 2018, Pages 208-215
نویسندگان
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