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A method for evaluating the liquation cracking susceptibility of welded joints in Al–Mg–Si alloys

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Welded joints in 6005-T6 alloy, strengthened by heat treatment, are investigated. The temperature dependences of the mechanical properties are determined using the Gleeble® 3800 System equipment in the welding conditions. The unknown parameters of the volume heat source are determined by inverse modelling. Three-dimensional problems of thermal conductivity and thermal plasticity are solved numerically. Accumulated plastic strains are used as a criterion for the formation of liquation cracking. The proposed method can be used to predict the formation of liquation cracks in welding of 6005-T6 alloy.
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Keywords: aluminium alloy; liquation cracking; mechanical properties; welded joints

Document Type: Research Article

Affiliations: Technical University, Lappeenranta, Finland

Publication date: 2013-02-01

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