Abstract
Gas tungsten arc welding (GTAW) process is a widely used process for joining similar and dissimilar metals due to good quality outputs from the process. The process is having several advantages in terms of sound welds, however, the heat input and speed of process remain big challenges that can be compensated over a sound quality of resulted welds. Owing to mentioned advantages, the GTAW process is used for applying the overlay, welding by root joints, and fill pass welding in several industrial applications. In the present book chapter, an overview of dissimilar weld deposits, root joints, and fill pass welding by GTAW process has been presented with several metallurgical and microstructural investigations. The study focuses the overlays on the form of buttering deposits made with Ni-base alloys (Inconel 82) as dissimilar welds by GTAW process. The metallurgical variations by GTAW process with Ni-base consumable and its effects on the weld chemistry and microstructure, heat flow, and micro-hardness are elaborated in the present chapter.
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