Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing

Materials

Hans J. Roven¹  Trond Furu²  Odd M. Akselsen³  Geir Langelandsvik³ 

[1] Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, 7034 Trondheim, Norway;Norsk Hydro, Corporate R&D Headquarter, 0283 Oslo, Norway;SINTEF Industry, Richard Birkelands veg 2B, 7034 Trondheim, Norway;

关键词: wire arc additive manufacturing;    WAAM;    additive manufacturing;    aluminum;    columnar-equiaxed-transition;    alloy development;   

DOI  :  10.3390/ma14185370

来源: DOAJ

【 摘 要 】

Processing of aluminum alloys by wire arc additive manufacturing (WAAM) gained significant attention from industry and academia in the last decade. With the possibility to create large and relatively complex parts at low investment and operational expenses, WAAM is well-suited for implementation in a range of industries. The process nature involves fusion melting of a feedstock wire by an electric arc where metal droplets are strategically deposited in a layer-by-layer fashion to create the final shape. The inherent fusion and solidification characteristics in WAAM are governing several aspects of the final material, herein process-related defects such as porosity and cracking, microstructure, properties, and performance. Coupled to all mentioned aspects is the alloy composition, which at present is highly restricted for WAAM of aluminum but received considerable attention in later years. This review article describes common quality issues related to WAAM of aluminum, i.e., porosity, residual stresses, and cracking. Measures to combat these challenges are further outlined, with special attention to the alloy composition. The state-of-the-art of aluminum alloy selection and measures to further enhance the performance of aluminum WAAM materials are presented. Strategies for further development of new alloys are discussed, with attention on the importance of reducing crack susceptibility and grain refinement.

【 授权许可】

Unknown