Hybrid laser-arc welding of AA6061-T6 butt joints

  1. Get@NRC: Hybrid laser-arc welding of AA6061-T6 butt joints (Opens in a new window)
DOIResolve DOI: http://doi.org/10.4028/www.scientific.net/MSF.783-786.2833
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Proceedings titleAdvanced Materials Research
Conference8th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2013, December 2-6, 2013, Las Vegas, NV
Pages28332838; # of pages: 6
SubjectButt welding; Electric arc welding; Heat affected zone; 6061; Aluminum construction; Butt joints; Hardening precipitates; Hybrid laser-arc welding; Optimized process; Root reinforcement; Weld bead geometry; Aluminum alloys
AbstractHybrid laser-arc welding (HLAW) of butt joints in 3.18 mm thick aluminum alloy (AA) 6061-T6 sheets was investigated in the present study. Under optimized process conditions, high integrity welds with approximately 2% shrinkage and gas porosity were obtained. The weld bead geometry was determined to conform to the crown and root reinforcement specifications for welded aluminum construction - CSA W 59.2 M1191. Softening in the heat-affected zone (HAZ) and fusion zone (FZ) of the welds was observed, the former due to grain coarsening and the latter due to the dissolution of the hardening precipitates as well as the dilution from the application of the ER 5356 filler wire. Under optimized process conditions, the gap tolerance was determined to be 0.5 mm, beyond which the performance of the joints during bend testing was compromised.
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AffiliationAerospace; National Research Council Canada
Peer reviewedYes
NPARC number21272152
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Record identifier4f2835ef-18fa-4a0b-ad3b-3e42cbda362c
Record created2014-07-23
Record modified2016-05-09
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