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Welding of aluminium alloy by using filler-added laser-arc hybrid welding process

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Abstract:

Laser-arc hybrid welding is considered to be an efficient, practical welding process because its deposited metal from welding wire can increase gap-bridging ability and prevent welding defects such as undercutting or underfilling. The deposition rate from welding wire, however, cannot be adjusted independently on the welding current under the stable welding conditions because it is necessary to maintain a constant arc voltage. Although the combination of a higher deposition rate and a lower welding current is sometimes needed, for example during the welding of a thin sheet, a high deposition rate generally accompanies with a high welding current in the conventional laser-arc hybrid welding. In order to solve the above-mentioned problems, the authors have proposed a novel method, a filler-added laser-arc hybrid welding (FLA welding) process, to increase a deposition rate without increasing the welding current itself in the welding of aluminium alloy. As a result, gap-bridging ability can be increased in the welding of both thin and thick plates. In this paper, the welding of aluminium alloy butt joints by using FLA welding process is discussed.

Keywords: aluminium alloy; butt joint; filler addition; laser-arc hybrid welding

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/09507116.2011.600013

Affiliations: 1: Panasonic Welding Systems Co. Ltd, Toyonaka-city,Osaka, Japan 2: Joining and Welding Research Institute, Osaka University, Osaka, Japan

Publication date: February 1, 2013

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