IJSRSET196442 | Received : 15 July 2019 | Accepted : 09 August 2019 | July-August-2019 [ 6 (4) : 312-315] © 2019 IJSRSET | Volume 6 | Issue 4 | Print ISSN: 2395-1990 | Online ISSN : 2394-4099 Themed Section : Engineering and Technology DOI : https://doi.org/10.32628/IJSRSET 312 Analysis of Dissimilar Metal Welding of 1020 Mild Steel and 304 Stainless Steel Dandu Rohith Raja 1 , S. Jithendra Naik 2 , L. Balasubramanyam 3 1 M.Tech Student, CAD/CAM, Department of Mechanical Engineering, PVKK Institute of Technology, Ananthapuramu, Andhra Pradesh, India 2 Associate Professor, Department of Mechanical Engineering, PVKK Institute of Technology, Ananthapuramu, Andhra Pradesh, India 3 HOD & Associate Professor, Department of Mechanical Engineering, PVKK Institute of Technology, Ananthapuramu, Andhra Pradesh, India ABSTRACT Joining of dissimilar metals has found its use extensively in power generation, electronic, nuclear reactors, petrochemical and chemical industries mainly to get tailor-made properties in a component and reduction in weight. However efficient welding of dissimilar metals has posed a major challenge due to difference in thermo-mechanical and chemical properties of the materials to be joined under a common welding condition. This causes a steep gradient of the thermo-mechanical properties along the weld. Keywords : Dissimilar Welding, Stress Corrosion Cracking, Thermal Stress, Residual Stress. I. INTRODUCTION Welding is extensively used in fabrication as an alternative method for casting or forging and as a replacement for bolted and riveted joints. It is also used as a repair medium e.g. to reunite a metal at a crack or to build up a small part that has broken off such as a gear tooth or to repair a worn surface such as a bearing surface. Advance welding techniques like Plasma Arc Welding, Laser Beam Welding, Electron Beam Welding, Electro-Magnetic Pulse Welding, Ultrasonic Welding, etc. are now being extensively used in electronic and high precision industrial applications. Metallurgy of a Welded Joint Metal is heated over the range of temperature up to fusion and followed by cooling ambient temperature. Due to differential heating, the material away from the weld bead will be hot but as the weld bead is approached progressively higher temperatures are obtained, resulting in a complex micro structure. The subsequent heating and cooling results in setting up internal stresses and plastic strain in the weld. Depending upon the slope of temperature gradient three distinct zones as shown in Fig. 2 can be identified in welded joint which are: 1. Base metal 2. Heat Affected Zone (HAZ) 3. Weld metal