Porosity in wire arc additive manufacturing of aluminium alloys

• DOI: 10.1016/j.addma.2021.101993
• Publication Date: 2021-04-06T06:05:25Z
• Authors: Tobias Hauser; Raven T. Reisch; Philipp P. Breese; Benjamin S. Lutz; Matteo Pantano; Yogesh Nalam; Katharina Bela; Tobias Kamps; Joerg Volpp; Alexander F.H. Ka...
• Keywords: 0203 mechanical engineering; 02 engineering and technology; ddc:

Wire Arc Additive Manufacturing is a near-net-shape processing technology which allows cost-effective manufacturing of large and customized metal parts. Processing aluminium in quite challenging, especially terms porosity. In the present work, pore behaviour AW4043/AlSi5(wt%) was investigated post-process monitoring approach developed. It has been observed that as shielding gas flow rate increases, porosity parts also increases due to rapid solidification melt pool by forced convection. The higher convection seems limit escape inclusions. Furthermore, inclusions escaping from leave cavities on surface each deposited layer. Process camera imaging used monitor these acquire information about part. observations were supported Computational Fluid Dynamics simulations show correlates with manufactured Manufacturing. Since lower leads reduced convective cooling, remains liquid for longer period allowing pores thus reducing Based investigations, presented.