EFFECT OF WELDING PARAMETERS ON THE MECHANICAL PROPERTIES OF FRICTION STIR WELDED DISSIMILAR ALUMINIUM ALLOYS 6101 & 6082

Mechanical Engineering

Welding is a joining process in which similar or dissimilar metals or alloys are joined by the application of heat with or without the aid of pressure. Friction Stir Welding (FSW) is relatively a new solid state joining process. This joining technique is energy efficient, environment friendly, and versatile. In particular, it can be used to join high strength aerospace aluminium alloys and other metallic alloys which are hard to weld by conventional fusion welding. The need for joints between dissimilar materials often arises in complex industrial applications. Therefore dissimilar-metal welding procedures are necessary for the manufacturing of a number of parts and structures in the industry. The applications of welding technologies is useful not only during production but also during repair or recycling process, therefore, new, economic, environmentally friendly technologies are being developed. In this investigation, Friction Stir Welding Process was used to weld the dissimilar aluminium alloys 6101 and 6082. The main objective of this research work was to study and optimize the effect of various welding parameters on the mechanical properties i.e. Tensile Strength and Impact Strength of friction stir welded joints. The welding parameters used to weld the aluminium alloys were Tool Rotational Speed, Welding Speed and Tool Pin Diameter. After conducting the experiments, it has been seen that the mechanical properties improve with increase in tool rotational speed and decrease with increase in welding speed. Also, the mechanical properties were found better in specimens welded with larger tool pin diameter.

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