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

Authors: Martikainen, J.; Hiltunen, E.; Karkhin, V. A.; Ivanov, S. Yu.

Source: Welding International, Volume 27, Number 2, 1 February 2013 , pp. 139-143(5)

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Abstract:

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.

Keywords: welded joints; aluminium alloy; mechanical properties; liquation cracking

Document Type: Research article

DOI: http://dx.doi.org/10.1080/09507116.2012.695545

Affiliations: 1: Technical University, Lappeenranta, Finland

Publication date: 2013-02-01