| 2006 №09 (03) | 2006 №09 (05) |
The Paton Welding Journal, 2006, #9, 20-24 pages
Residual stresses in butt joints of thin sheets from alloy amg6 after arc and laser-arc welding
V.A. Shonin, V.S. Mashin, V.Yu. Khaskin, T.N. Nedej
E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.Abstract
Results of experimental study of residual strains and stresses in butt joints of thin sheets from alloy AMg6 having thickness 1.9 mm made by MIG and MIG + laser welding are reported. It is established that a six-fold increase of the welding speed (hybrid process) provides a two-fold narrowing of the weld cross-section, one-and-a-half times narrowing of the HAZ with longitudinal residual stresses, and more than four-fold reduction of the transverse residual stresses.
Keywords: aluminium alloys, fusion welding, butt joints, thin-sheet structures, near-weld zone, residual strains, residual stresses
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