ANALYSIS OF THE INTERMETALLIC COMPOUND FORMATION IN THE DISSIMILAR METAL JOINTS OF COPPER AND STAINLESS STEEL USING ELECTRON BEAM WELDING
Electron Beam Welding is a type of fusion welding process in which a high beam of electrons hit the metals, melts and then solidifies to form a joint. It is used for high precision welds mainly in Aerospace industries. Fusion zone is very narrow with deep penetration and heat affected zones are very less when compared with other welding techniques. The metals melts and form an intermetallic compound which binds the base metals. The formed intermetallic compound acts as an alloy with high strength and possess the properties of both base metals. The analysis of intermetallic compound is very important as there are chances for oxides formation of various elements. This paper describes the dissimilar metal joint of Copper and Stainless Steel 304 using Electron Beam Welding. Tensile and Bending test are performed and the weld is found to be mechanically stable. Microstructural study is conducted using optical and Scanning Electron Microscope to analyze the presence of fatigue cracks, pores and voids. EDX Analysis shows the element composition in the formed intermetallic compound and found that the weldment is free from element oxides. Finally SEM analysis is carried out to analyze the nature of the grains in the intermetallic compound.