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EBSD Results of Material Flow and Microstructural Changes Around Tool Pin for the Dissimilar Friction Stir Welded AA6082-T6 and AA7075-T651

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Abstract

Frictional stir welding (FSW) generally experiences the forces Mode I axial metal flow and Mode II shear deformation around the rotating pin, along the welding direction to produce high-efficiency joints. The dissimilar FSW of AA6082/7075 joint was fabricated utilizing the process parameters such as rotational speed (R) of 900 rpm, travel speed (S) 90 mm/min, tilt angle (T) 2° and plunge depth (t) 0.9 mm. Subsequently, the zone-wise EBSD and metal flow analyses were carried out and compared with the results of the microstructure and the microhardness. Distinct variations of Mode I and Mode II metal flow and fine grain formation in weld nugget have been shown here.

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Acknowledgements

Author thanks IIT Bombay OIM-SEM Laboratory for providing EBSD analysis facilities.

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  1. National Institute of Technology, Tiruchirappalli, Tamilnadu, 620 015, India

    K. T. Thilagham & S. Muthukumaran

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  1. K. T. Thilagham
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  2. S. Muthukumaran
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Correspondence to K. T. Thilagham.

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Thilagham, K.T., Muthukumaran, S. EBSD Results of Material Flow and Microstructural Changes Around Tool Pin for the Dissimilar Friction Stir Welded AA6082-T6 and AA7075-T651. Trans Indian Inst Met 73, 2415–2424 (2020). https://doi.org/10.1007/s12666-020-02063-y

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