Welding Metallurgy of

Joining of dissimilar metals using microwave hybrid heating and Tungsten Inert Gas welding - A review

Research Progress on Control Strategy of Intermetallic Compounds in Welding Process of Heterogeneous Materials

The aluminium alloy and stainless steel were successfully joined by arc brazing with the aid of milling without using flux at a low heat input. With the increase of the radial cutting depth, more a...

Arc joining of aluminium alloy to stainless steel with the aid of milling

In the present work, mild steel sheets consisting two batches were welded by resistance spot welding at different welding parameters and exposed under different environments. The 5% sodium chloride brine was used in the salt spray test, produced a whole rusty surface on the tested specimens (batch 2). The welding joints were subjected to tensile-shearing test in order to determine the strength of the welded joints from ambient and in corrosive environment. Tensile-shear test showed significant differences on the failure load between these two batches where corrosion had affected the surface strength of the welded steel. The results also showed that the highest tensile shear strength is given by the specimen welded using 4kA current at 4 cycles. Keywords: mild steel, spot welding, microstructural, tensile shear test INTRODUCTION Resistance spot welding is usually used in the fabrication of sheet metal assembly. It can be used to weld materials such as low carbon steel, nickel, aluminum, titanium, copper alloy, stainless steel and high strength low alloy steel. Resistance spot welding process is most applicable in the industrial fields of manufacture and maintenance (car industry, aerospace and nuclear sectors, electronic and electric industries [1], [2], [3]. The static strengths of spot welds have also been explored. Mechanical tests of spot welds in tension–shear, direct tension, torsion and peel specimens were also reported [1]. Currently, mild steels are mostly used in applications where demands for corrosive protection are put forward. The most common cases reported were erosion corrosion. The aim of this present paper is to study on spot welded of mild steel towards variety of welding parameters (welding current, welding cycle) in ambient and corrosive environment.

The influence of welding parameters and corrosive environment on the joint strength of resistance sp

The effect of welding current on the joining of mild steel and aluminum 6063 has been investigated. The joining was carried using a tungsten inert gas (TIG) welding. The welding currents used were 30 A to 80 A. The formation of intermetallic reaction layers (IML) and tensile shear strength of the joining were investigated. The result showed that tensile shear strength increased as welding current increased up to 55 A. Microstructural analysis showed that intermetallic reaction layer was formed at the interface between steel and aluminum alloy during welding process. The thickness of IML was decreased with decreasing welding current.

Mohd Zahir Abd Latif

Papers

Joining Dissimilar Metals between Steel and Aluminum by TIG Welding