Deposition strategies using arc oscillation to improve the fabrication of solids by wire arc additive manufacturing

• Published in: International journal of advanced manufacturing technology 2023-09, Vol.128 (3-4), p.1559-1576
• Main Authors: Carvalho, Gustavo H.S.F.L., Campatelli, Gianni
• Format: Article
• Language: English
• Subjects: Accuracy; Additive manufacturing; Advanced manufacturing technologies; Arc deposition; CAE) and Design; Computer-Aided Engineering (CAD; Efficiency; Engineering; Grain growth; Grain size; Heat treatment; Industrial and Production Engineering; Machining; Manufacturing; Mechanical Engineering; Media Management; Original Article; Solids; Steel; Technology; Wire
• ISSN: 0268-3768; 1433-3015
• DOI: 10.1007/s00170-023-11912-1

This work investigates deposition strategies using arc oscillation to manufacture steel solids by wire arc additive manufacturing (WAAM) in order to avoid excessive grain growth, one of the main challenges in solid manufacturing by WAAM. The components were characterised morphologically, mechanically, metallurgically and in terms of material efficiency and geometric uniformity. The results show that the solids fabricated with arc oscillation resulted in an average grain size similar to the original base material or even smaller in completely continuous depositions, i.e. without idle time. The strategies can be used to produce solids without heat treatments or waiting time between layers, therefore increasing the deposition rate and reducing costs. Smaller oscillated beads generated solids with more uniform and accurate dimensions, showing better use of material and less material waste in the case of machining.