Anisotropy in the Mechanical Behaviour of the Low-carbon Steel Wall Produced by Wire Arc Additive Manufacturing without or Under Ultrasonic Assistance

Anisotropy in the mechanical behaviour was studied in steel wall produced by WAAM under or without ultrasonic assistance (UA). Anisotropy of the mechanical behaviour was found in sample produced by WAAM without UA and was not observed in sample manufactured by WAAM under UA. It was assumed that the reason for the anisotropy of the mechanical behaviour in sample produced by the WAAM without UA was the grains formed during the α → γ → α transformation inherited the texture of the columnar grains. Ultrasonic assistance during WAAM decreased the texture of columnar grains, as a result, the mechanical behaviour was more isotropic.