Applications and challenges of arc welding methods in dissimilar metal joining

Abstract

Dissimilar metal welding is a significant metal joining process with an extensive application in industrial domain. The quality of the welded joint is of critical importance in these applications and quite an issue since the base metals are different primarily due to different physical, chemical and mechanical characteristics. In this paper, the challenges encountered in dissimilar metal joining are enlisted with a brief discussion on the corresponding causes. As discussed in the literature, several methods exist to form dissimilar joints. However, arc-based fusion methods are prominently used. Therefore, an overview of these methods is presented along with the applications in which these methods have been used. The study provides a brief account of the materials that have been successfully joined using these methods and the influence of significant parameters including filler materials on the effectiveness of dissimilar joining.

Experimental Investigation and Parametric Optimization of the Tungsten Inert Gas Welding Process Parameters of Dissimilar Metals

“…Previous studies on the TIG welding of diverse and dissimilar metals can be split into three categories: characterization, parameter optimization, and application. Heat conduction from the molten weld pool to a base metal with a higher thermal conductivity absorbs thermal energy and determines the amount of energy needed to melt the base metal locally [9,10]. During cooling, the differing base metals' thermal expansion coefficients produce tensile in one part and compressive stress in the other part.…”

“…During cooling, the differing base metals' thermal expansion coefficients produce tensile in one part and compressive stress in the other part. If the stress is not relieved, the metal deposited under tensile stress may experience hot cracking during welding or cold cracking during service [9,10]. When welding metals with significantly different thermal conductivity, the heat source must provide a thermal differential for proper thermal equilibrium.…”

“…Thus, the heat source is always directed toward the metal with higher thermal conductivity to balance the heat. Preheating the base metal with a higher thermal conductivity can control heat loss to the base metal and reduce the cooling rate of the weld metal and the heat-affected zone (HAZ) [9,10]. During cooling, the difference in thermal expansion coefficients between the base metals creates tensile stress in one and compressive stress in the other.…”

Identification and Review of Sensitivity Analysis Using Fuzzy ARAS Method

“…Originally FAHP Key criteria and sub-criteria previous research, decision-making A comparison of results and findings among four other multi-attribute decision makers (MADM) sensitivity analysis and proposed methods framework Final ranking procedures and significance criteria show Findings and ensuring credibility. For this purpose, epiphysis the kings weight of inch scales on the Final ranking of Fuzzy ARAS method is analyzed separately [4]. It is successfully used in many Sectors like sustainable development and construction.…”

Cracking Driving Force at the Tip of SCC under Heterogeneous Material Mechanics Model of Safe-End Dissimilar Metal-Welded Joints in PWR

“…e austenitic stainless steel and nickel-based alloy with excellent high-temperature mechanical properties and corrosion resistance have been widely used for structural welding materials in nuclear power plant's (NPP) primary circuits [1][2][3][4]. Previous research and practices have shown that corrosion resistance is mainly due to the formation of chromium-rich oxide film on the metal surface.…”