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Welding Aluminum Alloy 6061 With Opposing Dual Torch Gtaw Process
| Citations: | 4 - 1 self |
BibTeX
@MISC{Zhang_weldingaluminum,
author = {Zhang And Zhang and Y. M. Zhang and S. B. Zhang},
title = {Welding Aluminum Alloy 6061 With Opposing Dual Torch Gtaw Process},
year = {}
}
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Abstract
Cracking is a major concern in welding aluminum alloys. Although weld solidification cracks can be eliminated through addition of filler alloy, the additives modify the alloy or base-metal constituents and may not always be desirable. High-energy beam processes, such as electron-beam welding, that result in minimal heat input reduce crack sensitivity, but their high cost limits their applications. In this study, the conventional gas tungsten arc welding process is modified by disconnecting the workpiece from the power supply and placing a second torch on the opposite side of the workpiece. Such a modification changes the direction of the current flow, improves the weld penetration, and reduces the heat input. Using this modified process, 6061-T651 alloy was welded without filler metals. Analysis suggested the reduced heat input, the changed direction of the current flow, and the symmetric heating were responsible for the observed reduction of the cracking sensitivity. INTRODUCTION Cr...
Keyphrases
aluminum alloy dual torch gtaw process current flow heat input symmetric heating minimal heat input power supply base-metal constituent filler alloy high cost limit second torch crack sensitivity filler metal 6061-t651 alloy introduction cr opposite side electron-beam welding weld solidification crack major concern weld penetration observed reduction changed direction modified process high-energy beam process cracking sensitivity
