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Fabrication of 7075-0.25Sc-0.15Zr Alloy with Excellent Damping and Mechanical Properties by FSP and T6 Treatment

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Abstract

This study investigated the effects of Sc and Zr additions, friction stir processing (FSP), and subsequent solid solution and artificial aging (T6) treatment on the microstructure, damping capacity, and mechanical properties of 7075 Al alloy. The minor Sc and Zr additions promoted the grain refinement of this alloy during FSP and inhibited the growth of fine equiaxed grains in the FSP sample during subsequent T6 treatment. Thus, the fine equiaxed grain structure and high density of the η′ precipitated phase were simultaneously obtained in the 7075 Al alloy containing Sc and Zr after FSP and T6 treatment, and this sample exhibited superior mechanical properties and damping capacity to those of the 7075 Al alloy after T6 treatment. This work provides an effective strategy for preparing Al alloys with excellent damping capacity and mechanical properties.

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Acknowledgments

This work was funded by the National Natural Science Foundation of China (No. 51601045), the Guangxi “Bagui” Teams for Innovation and Research, the Guangxi Natural Science Foundation (No. 2016GXNSFDA380028), and the Science and Technology Major Project of Guangxi (No. GKAA17202007-1).

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Authors and Affiliations

  1. Alnan Aluminium Co., Ltd., Nanning, 530031, China

    Y. F. Mo

  2. Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Ministry of Education, Guilin University of Technology, Guilin, 541004, China

    C. Y. Liu, G. B. Teng, H. J. Jiang, Y. Chen, Z. X. Yang, Y. Chen & S. C. Han

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  1. Y. F. Mo
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  2. C. Y. Liu
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  3. G. B. Teng
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  4. H. J. Jiang
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  5. Y. Chen
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Correspondence to C. Y. Liu.

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Mo, Y.F., Liu, C.Y., Teng, G.B. et al. Fabrication of 7075-0.25Sc-0.15Zr Alloy with Excellent Damping and Mechanical Properties by FSP and T6 Treatment. J. of Materi Eng and Perform 27, 4162–4167 (2018). https://doi.org/10.1007/s11665-018-3451-2

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  • DOI: https://doi.org/10.1007/s11665-018-3451-2

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