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Influence of Rotation Rate on Microstructure and Comprehensive Performance of FSWed Mg Alloy

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Abstract

Die-casting AZ31 Mg alloys were successfully friction stir welded at a constant welding speed and different rotation rates. More uniform and fine grains were obtained at the rotation rate of 1400 rpm due to more suitable temperature for dynamic recrystallization in this welding condition. In addition, the intensity of (0001) texture in stir zone increased with the increasing rotation rate. The results of mechanical property test indicated joint with rotation rate of 1400 rpm had better tensile property, which was associated with fine grains, uniform transition in the interface between thermo-mechanically affected zone and stir zone as well as more favorable Schmidt factor for basal slip and twinning. The corrosion resistance of joints increased with the increasing rotation rate, which is significantly related to the (0001) texture with basal plane parallel to the corroded surfaces.

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Acknowledgments

This study was sponsored by the Fund for Shanxi Key Subjects Construction, National Natural Science Foundation of China (No. 51275332), the Natural Science Foundation of Shanxi Province (No. 201601D011036) and Natural Science Youth Foundation of Shanxi Province (No. 2015021130).

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Authors and Affiliations

  1. School of Material Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, China

    Yajie Li, Fengming Qin, Cuirong Liu & Zhisheng Wu

  2. Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Canada

    Leijun Li & Zhisheng Wu

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  1. Yajie Li
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  2. Fengming Qin
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Correspondence to Zhisheng Wu.

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Li, Y., Qin, F., Liu, C. et al. Influence of Rotation Rate on Microstructure and Comprehensive Performance of FSWed Mg Alloy. J. of Materi Eng and Perform 27, 5635–5643 (2018). https://doi.org/10.1007/s11665-018-3704-0

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  • DOI: https://doi.org/10.1007/s11665-018-3704-0

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