Abstract
We study welded joints of sheets 4 mm in thickness made of D16T alloy (an analog of 2024-Т3 alloy) in the as-delivered state (hardening and natural aging) and after additional artificial aging. The joints are obtained by fusion welding with the use of the pulsed-arc method with consumable electrode (Zv1201). It is shown that, for some modes of heat-treatment of the welded alloy and welded joint, the ratio of strength of the weld and base metals is equal to 0.9. For the weld metal, the complex structural strength parameter of the material P = [σuΔKthΔKfc ] is 1.25 times higher than for the base metal. We consider the possibility of evaluation of the mechanical characteristics of the investigated welded joints by the nondestructive method according to the specific electric conductivity.
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