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Author:

Xiao, J. (Xiao, J..) | Chen, S.J. (Chen, S.J..) (Scholars:陈树君) | Zhang, G.J. (Zhang, G.J..) | Zhang, Y.M. (Zhang, Y.M..)

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Scopus

Abstract:

Current-independent metal transfer that allows the droplet to be detached at any reasonable small diameter and low current will provide the gas metal arc welding (GMAW) process with entirely new abilities to better meet possible needs from different applications. To this end, a novel GMAW process involving the use of a pulsed fiber laser to irradiate droplets is proposed as a significant evolution from the previous laser-enhanced GMAW. The laser is focused to a tiny spot to maximize the laser power density and aimed at the liquid droplet. It is expected the irradiation of a pulsed laser with a relatively large peak power would generate an adequate recoil force to dominate the droplet detachment. Laser-induced vaporization is first observed and analyzed. The metal transfer under continuous wave (CW) and pulsed laser irradiation are then experimentally observed/analyzed. The results demonstrate that the current-independent metal transfer is successfully realized by using the pulsed laser, since the selected laser allows much higher peak power in pulsed mode. The desirable one drop per pulse (ODPP) transfer is obtained. Therefore, a pulsed fiber laser not only avoids waste of laser energy but also achieves the desired controllability on the metal transfer. The verified current-independent metal transfer ensures free design or optimization of current waveform without constraint from the metal transfer. Copyright © 2016 by American Welding Society in both printed and electronic formats.

Keyword:

Laser-Enhanced Gas Metal Arc Welding (GMAW); Metal Transfer; Pulsed Laser Irradiation

Author Community:

  • [ 1 ] [Xiao, J.]Engineering Research Center of Advanced Manufacturing Technology for Automotive Components, Ministry of Education, Beijing University of Technology, Beijing, China
  • [ 2 ] [Xiao, J.]Institute for Sustainable Manufacturing, University of Kentucky, Lexington, KY, United States
  • [ 3 ] [Chen, S.J.]Engineering Research Center of Advanced Manufacturing Technology for Automotive Components, Ministry of Education, Beijing University of Technology, Beijing, China
  • [ 4 ] [Zhang, G.J.]State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, China
  • [ 5 ] [Zhang, Y.M.]Institute for Sustainable Manufacturing, Department of Electrical and Computer Engineering, University of Kentucky, Lexington, KY, United States

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Source :

Welding Journal

ISSN: 0043-2296

Year: 2016

Issue: 3

Volume: 95

Page: 93s-100s

2 . 2 0 0

JCR@2022

ESI Discipline: MATERIALS SCIENCE;

ESI HC Threshold:305

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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