Structural Strength of Welded Joints of Thermally Hardened Alloy of the Al–Cu–Mg System

• Published in: Materials science (New York, N.Y.) N.Y.), 2020, Vol.55 (4), p.548-554
• Main Authors: Ostash, О. P., Labur, T. М., Holovatyuk, Yu. V., Vira, V. V., Koval, V. А., Shynkarenko, V. S., Yavorska, М. R.
• Format: Article
• Language: English
• Subjects: Aging (artificial); Aging (natural); Alloys; Aluminum base alloys; Base metal; Characterization and Evaluation of Materials; Chemistry and Materials Science; Consumable electrode welding; Coordination compounds; Copper; Electrical conductivity; Electrical resistivity; Fusion welding; Hardening; Heat treatment; Magnesium; Materials Science; Mechanical properties; Nondestructive testing; Solid Mechanics; Specialty metals industry; Structural Materials; Structural strength; Weld metal; Welded joints; Welding; Welding parameters
• ISSN: 1068-820X; 1573-885X
• DOI: 10.1007/s11003-020-00337-w

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 = [σ u Δ K th Δ K fc ] 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.