Abstract
The present study is one of the first steps towards the clear scientific understanding of the influence of the chemical composition of the weld metal on its susceptibility to the solidification cracking. It focuses on the experimental investigation of the influence of the silicon content in the weld metal by the laser beam welding of the aluminium alloy AA6056-T4. The blind seams have been produced on the so called fan-shape samples of AA6056-T4, varying only the filler wire supply rate. The dependence of centreline crack length on weld composition has been studied. It is shown, that the relatively small additions of the silicon to the weld metal lead to the sufficient increase of the cracking resistance. This positive effect is explained considering the particularities of the solidification cracking mechanism on the microscopic scale.
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Ploshikhin, V., Prikhodovsky, A., Ilin, A. et al. Influence of the Weld Metal Chemical Composition on the Solidification Cracking Susceptibility of AA6056-T4 Alloy. Weld World 50, 46–50 (2006). https://doi.org/10.1007/BF03263460
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DOI: https://doi.org/10.1007/BF03263460