Double-sided hybrid laser-MIG welding plus MIG welding of 30-mm-thick aluminium alloy

Hybrid laser-MIG (metal inert gas) welding has not been extensively applied in welding of aluminium alloy with thickness more than 10 mm because of the existence of weld defects and low joint strength. In this study, an original hybrid laser-MIG welding plus MIG welding process was developed. Double...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2018-07, Vol.97 (1-4), p.903-913
Main Authors: Jiang, Zhao, Hua, Xueming, Huang, Lijin, Wu, Dongsheng, Li, Fang, Zhang, Yuelong
Format: Article
Language:English
Subjects:
Aluminum base alloys
CAE) and Design
Computer-Aided Engineering (CAD
Enclosures
Engineering
Gas metal arc welding
Grains
Industrial and Production Engineering
Industrial applications
Laser beam welding
Lasers
Mechanical Engineering
Mechanical properties
Media Management
Original Article
Production planning
Rare gases
Weld defects
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Summary:Hybrid laser-MIG (metal inert gas) welding has not been extensively applied in welding of aluminium alloy with thickness more than 10 mm because of the existence of weld defects and low joint strength. In this study, an original hybrid laser-MIG welding plus MIG welding process was developed. Double-sided hybrid laser-MIG welding method was designed and applied to the welding of 30-mm-thick Al 5083 alloy. The process was then optimized by overlaying a MIG welding upon the weld. Analysis on the weld revealed that the overlaid MIG welding played multiple roles, including making up the bead formations, eliminating the keyhole-induced porosities as well as refining grains. Along the longitudinal direction of the weld, the grains became finer from two fringes to the middle, and the mechanical properties improved accordingly. Compared with MIG welding, the hybrid laser-MIG welding plus MIG welding process showed overwhelming superiorities over the MIG welding, which will be promising in industrial applications.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-018-1997-7