TIG Arc Welding - Brazing of Dissimilar Metals - An Overview

Abstract

Tungsten inert gas (TIG) arc welding–brazing has been recently developed and is being increasingly implemented in various industrial applications. Nowadays, this process gains much attention in joining of dissimilar metal combinations. This review paper explains the principles underlying TIG arc welding – brazing of dissimilar metal combinations and highlights the above benefits in a number of practical applications. The process mechanism of TIG brazing is different from the conventional welding processes and it will bridge the gap between the two substrates by the addition of fillers under the concentrated heat source of TIG electrode. TIG brazing technique is one of the best alternative process among the other joining process for effective joining of dissimilar metals, which have various melting temperatures and physical properties. It is very important to understand the process mechanism and its compatibility with the various dissimilar materials joining. The present study focuses on the addressing of progress of TIG brazing process in modern days and its applications in the various industries, and to bring the awareness to the manufacturers about the importance of this process from this review report. Keywords: Tungsten inert gas (TIG) arc welding–brazing, Dissimilar metals, Microstructures, Mechanical properties.

Microstructural and Mechanical Properties of AZ31B to AA6061 Dissimilar Joints Fabricated by Refill Friction Stir Spot Welding

“…The friction stir welding (FSW) process produces key hole defects during the welding process, whereas the spot welding (SW) process produces pores and solidification cracks during the welding process [4,5]. Along with the FSW, other processes are also made to develop dissimilar welds using multi-materials [6][7][8][9][10]. The challenges, interface characteristics, and intermetallic formation of the joints are studied in detail [11][12][13][14][15][16].…”

Analysis and Characterization of the Weld Pool and Bead Geometry of Inconel 625 Super-TIG Welds

“…Additionally, in wire arc additive manufacturing, it may affect the resolution by inducing the flow of metal [14], unlike the power ratio used to control hot cracking and dilution in the nuclear power plants. Therefore, H R is considered to be a better parameter for setting the welding conditions due to considering the welding speed and deposition area [18][19][20][21].…”