engleski

MICRO FRICTION STIR WELDING OF COPPER ELECTRICAL CONTACTS

Electrical industry is using high electro conductive copper likes CuOF, CuETP, CuOFP and CuAg 0.02 for production of different electronic products. Joining of copper or its alloys is difficult since the weldability of materials is limited using conventional welding technologies like arc welding and resistance welding or laser welding due to their properties like, good electrical and temperature conductivity and low electrical resistance. Weldability of these materials is better using friction welding technology, ultrasonic technology or vibrational technology. In this paper micro Friction Stir Welding (FSW) of electrical contacts is investigated. Different FSW tools are used and welding parameters are tested in order to find the welding parameters at which a sound weld could be obtained. Typical welding defects are evaluated and optimal welding parameters and tools are defined. A Vickers microhardness was measured and reveals the influence of welding parameters on the change of hardness.

micro friction stir welding (FSW); Cu ETP; tensile test; microstructure; welding defects

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