A Review on Wire Arc Additive Manufacturing: Effect of Process Parameters on the Build Material Properties

Wire arc additive manufacturing (WAAM) has attracted more attention in recent years, due to its ability to create large components with high material deposition rate and low cost of equipment. It is getting more popular nowadays because it provides high strength at low cost, high deposition rate, faster build time, and optimum heat input. In this article, a comprehensive literature review has been covered to show the effect of different process parameters on mechanical and microstructural properties. Primarily, aim is to provide information about accuracy of WAAM manufactured part in correlation with change in different processes parameters such as heat input, current, voltage, wire feed rate, and travel speed. This paper also gives an idea about which parameters can be used to get desired mechanical and microstructural properties. It also provides information about challenges that lead to abnormal results and remedies to overcome with heterogeneous and anisotropic properties of materials. Selection of process parameters help to optimize the WAAM process to obtain the desired geometry with required properties.