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.

中文翻译：

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Al-Cu-Mg系热硬化合金焊接接头的结构强度

我们研究了由 D16T 合金（2024-Т3 合金的类似物）制成的 4 毫米厚板在交付状态（硬化和自然时效）和额外人工时效后的焊接接头。接头是通过熔焊获得的，使用脉冲电弧法使用自耗电极（Zv1201）。结果表明，对于焊接合金和焊接接头的某些热处理方式，焊缝与母材的强度比等于0.9。对于焊缝金属，材料的复合结构强度参数 P = [σ u Δ K th Δ K fc ] 比母材高 1.25 倍。我们考虑了根据特定电导率通过无损方法评估所研究焊接接头机械特性的可能性。