Assessment of the quality and mechanical properties of metal layers from low-carbon steel obtained by the WAAM method with the use of additional using additional mechanical and ultrasonic processing

OBRABOTKAMETALLOV TECHNOLOGY Vol. 26 No. 4 2024 Fig. 5. Assessment of weld quality after machining after each pass a b Fig. 6. Microstructure of metal in the joint area after tempering Ta b l e 1 Results of static tensile tests Specimen identifi cation mark Test temperature, °С Yield strength, σy (σ0,2) MPa Ultimate strength, σu, MPa Relative elongation, δ5 (δ10), % 1 20 364; 356; 361 474; 479; 481 16.75; 17.01; 16.82 2 with machining 20 404; 410; 412 518; 522; 527 33.25; 33.01; 32.48 Steel 0.09 C-2 Mn-Si (GOST) 265 430 21 Steel 0.09 C-2 Mn-Si (Fact) 20 275; 270; 278 435; 431; 440 22.01; 22.12; 22.34

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