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Superplastic Properties of AZ31 and AZ31-1.0Y-1.3Sr Alloy Produced by Twin-Roll Casting and Sequential Hot Rolling

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Abstract

Superplastic mechanical properties of the AZ31 and AZ31-1.0Y-1.3Sr magnesium alloy sheets produced by twin-roll casting and sequential hot rolling (TRC) were investigated. The AZ31-1.0Y-1.3Sr alloy sheets with the thickness of 1 mm were prepared by twin-roll casting process, which exhibited finer equiaxed grain structure. Uniaxial tensile testing and gas blow forming on AZ31 and AZ31-1.0Y-1.3Sr magnesium alloy sheets were carried out. Results show that the superplastic mechanical properties of AZ31-1.0Y-1.3Sr alloys are better than those of AZ31 alloys at 400 °C and the strain rate of 7 × 10−4/s. The addition of Y and Sr elements is helpful to improve the formability of AZ31 alloy. Grain boundary sliding plays a dominant role in superplastic forming.

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Acknowledgments

The authors gratefully acknowledge the financial support by the HarBin Science and Technology Burean (NO. 2014RFQXJ102), The School Youth Foundation of Heilongjiang Institute of Technology (NO. 2014QJ09), National Natural Science Foundation of China (NO. 51404082).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, China

    Huiyan Ning, Yandong Yu & Kai Lin

  2. School of Mechanical and Electrical Engineering, Heilongjiang Institute of Technology, Harbin, 150050, China

    Huiyan Ning, Lihua Wen & Chunxiang Liu

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  1. Huiyan Ning
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  2. Yandong Yu
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Correspondence to Yandong Yu.

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Ning, H., Yu, Y., Lin, K. et al. Superplastic Properties of AZ31 and AZ31-1.0Y-1.3Sr Alloy Produced by Twin-Roll Casting and Sequential Hot Rolling. J. of Materi Eng and Perform 25, 635–641 (2016). https://doi.org/10.1007/s11665-015-1857-7

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  • DOI: https://doi.org/10.1007/s11665-015-1857-7

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