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Effects of different friction stir welding conditions on the microstructure and mechanical properties of copper plates

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Abstract

Friction stir welding is a new and innovative welding method used to fuse materials. In this welding method, the heat generated by friction and plastic flow causes significant changes in the microstructure of the material, which leads to local changes in the mechanical properties of the weld. In this study, the effects of various welding parameters such as the rotational and traverse speeds of the tool on the microstructural and mechanical properties of copper plates were investigated; additionally, Charpy tests were performed on copper plates for the first time. Also, the effect of the number of welding passes on the aforementioned properties has not been investigated in previous studies. The results indicated that better welds with superior properties are produced when less heat is transferred to the workpiece during the welding process. It was also found that although the properties of the stir zone improved with an increasing number of weld passes, the properties of its weakest zone, the heat-affected zone, deteriorated.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan, 651754161, Iran

    Ali Alavi Nia & Ali Shirazi

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  1. Ali Alavi Nia
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  2. Ali Shirazi
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Correspondence to Ali Alavi Nia.

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Nia, A.A., Shirazi, A. Effects of different friction stir welding conditions on the microstructure and mechanical properties of copper plates. Int J Miner Metall Mater 23, 799–809 (2016). https://doi.org/10.1007/s12613-016-1294-0

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  • DOI: https://doi.org/10.1007/s12613-016-1294-0

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