EFFECT OF DIFFERENT INTERLAYER TEMPERATURES ON FERRITE-AUSTENITE PHASE FORMATION OF DSS WALLS FABRICATED USING GMAW-AM PROCESS

Abstract
A suitable interlayer temperature employed during fabrication of Duplex Stainless Steel (DSS) parts via the Gas Metal Arc Welding-Additive Manufacturing (GMAW-AM) process can be highly instrumental in optimizing overall heat input. Given the importance of this parameter, this study aims to identify the role of different interlayer temperatures, 50 ℃, 100 ℃, 150 ℃, and 200 ℃, on the ferrite-austenite (α-γ) phase formations in DSS walls developed using the GMAW-AM process. The microstructure analysis showed that the lowest interlayer temperature promoted the highest ferritization (64%) at the cost of the longest production time. To strike the right balance between α-γ phases and production time, the interlayer temperature of 150℃ is recommended as the most suitable interlayer temperature for the fabrication of DSS parts by the GMAW-AM process. Keywords - GMAW-AM, DSS, Interlayer Temperature, Ferrite-Austenite Phases, Productivity.