Comparison of mechanical properties of pure copper welded using friction stir welding and tungsten inert gas welding |
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| Institution: | 1. Department of Mechanical Engineering, National Kaohsiung University of Applied Sciences, 415 Chien-Kung Road, Kaohsiung 807, Taiwan, ROC;2. Metal Industries Research & Development Centre, 1001 Kaonan Highway, Kaohsiung 811, Taiwan, ROC;1. Young Researchers and Elites Club, East Azarbaijan Science and Research Branch, Islamic Azad University, Tabriz, Iran;2. School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran;1. Department of Mining and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, P. O. Box: 15875-4413, Iran;2. School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, P. O. Box: 11155-4563, Iran |
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| Abstract: | The objective of this research is to investigate the mechanical properties including bonding, tensile strength, and impact resistance of pure copper welded using friction stir welding (FSW) method and compare them with that of tungsten inert gas (TIG) welding. Micro-hardness tests are performed on pure copper, TIG welded copper and FSW welded copper to determine the effect of heat on the hardness of welded coppers. Tensile strength tests and notch tensile strength tests are performed to determine the mechanical properties of different weld process.In this experiment, it is found that the notch tensile strength and the notch strength ratio for FSW (212 MPa, 1.10) are significantly higher than those (190 MPa, 1.02) of TIG welding. For the impact tests, the weld zone and heat-affected zone energy absorption values for FSW (2.87 J, 2.25 J) are higher than those (1.32 J, 0 J) of TIG welding. XRD tests are performed to determine components of copper before and after welding process for TIG and FSW. |
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| Keywords: | Friction stir welding (FSW) Tungsten inert gas (TIG) welding Pure copper Impact toughness |
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