Influence of Deposition Strategy in CMT-Based Wire and Arc Additive Manufacturing on Part Geometry: a Literature Review

Abstract

Abstract  Additive manufacturing is a technology that enables the production of parts through the successive addition of material in layers. This technique allows for the printing of polymers, metals, ceramics, glass, biomaterials, and composite materials. The deposited materials can be wire, powder, or liquid form. Wire and Arc Additive Manufacturing (WAAM) is a promising technique in the processing of metal alloys, where Cold Metal Transfer (CMT) is a variation of the GMAW process that provides lower heat input during material transfer, having impact on the part quality. Therefore, this study aims to present a literature review of deposition strategies and to compare the effects caused by using different parameters, specifically in WAAM. As a result, it was possible to identify that controlling the heat input is a decisive factor in preventing defects and improving the surface finish of the parts. Different strategies and parameters alter the microstructure and, consequently, the mechanical properties of the part.

Key-words:
Additive manufacturing; WAAM; CMT; Deposition strategy