Puckering phenomenon and its prevention in GMA welding of aluminum alloys

Journal Article · Thu Dec 01 04:00:00 EST 1994 · Welding Journal (Miami); (United States)

OSTI ID:6666417

Miyazaki, H; Miyauchi, H ^[1]; Sugiyama, Y ^[2]; Shinoda, T ^[3]

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1. Kyodo Oxygen Co. Ltd., Wakayama (Japan). Technical Development Dept.
2. Nippon Trailmobile Co. Ltd., Aichi (Japan)
3. Nagoya Univ. (Japan)

The formation of puckered beads at high welding currents is a well-known phenomenon that occurs in gas metal arc (GMA) welding of aluminum alloys. It is possible to increase the threshold welding current at which puckering occurs to higher values and to arrest puckering by using an improved GMA welding technique. The technique uses a double wire feed in which a cold filter metal wire (called filler metal wire hereafter) is fed into the molten pool behind the electrode wire. Experimental investigations were carried out to clarify this phenomenon and the main conclusions obtained are as follows: (1) entrainment of air is the direct cause of puckering; (2) the effectiveness of double wire gas metal arc (DW GMA) against puckering can be explained by the fact that introduction of the filler metal wire enables sufficient quantities of molten metal to be maintained directly under the arc, which remains stable even at high currents.

• OSTI ID: 6666417
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 73:12; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ALUMINIUM ALLOYS
ARC WELDING
DATA
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FABRICATION
FILLER METALS
GAS METAL-ARC WELDING
INFORMATION
JOINING
NUMERICAL DATA
PERFORMANCE
POWER SUPPLIES
WELDING
WELDING MACHINES