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Effect of Rolling Temperature on the Microstructure and Mechanical Properties of AZ31 Alloy Sheet Processed through Variable-Plane Rolling

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Abstract

AZ31 magnesium alloy sheet was produced through variable-plane rolling (VPRing) under different temperatures, and a conventional rolled AZ31 alloy was investigated for comparison. A basal texture was formed during these two processes. The texture intensity was closely related to dynamic recrystallization and deformation mechanism. Four types of twins appeared, namely {10-12} extension twins, {10-13} and {10-11} contraction twins and {10-11}-{10-12} double twins. High rolling temperature and rolling plane alteration were beneficial for activating {10-11}-{10-12} double twins. The tensile strengths revealed a declining trend with elevated rolling temperatures. The AZ31 alloy rolled at 573 K showed advantageous combination with a high yield strength of 286 MPa and compromised elongation of 5%. The mechanical anisotropy of VPRed AZ31 sheet decreased with nearly similar yield strengths along the roll direction (RD), transverse direction and 45° away from the RD. The VPRing process improved the rollability and strength of Mg alloy and reduced its mechanical anisotropy.

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Acknowledgments

This work was financially supported by Natural Science Foundation of Jiangsu Province (No. BK20161582) and Scientific Research Foundation of the Nanjing Communications Institute of Technology, China.

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  1. College of Rail-Transit, Nanjing Vocational Institute of Transport Technology, Nanjing, 211188, China

    Yanjun Wu

  2. Department of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

    Rong Zhu

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  1. Yanjun Wu
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Correspondence to Rong Zhu.

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Wu, Y., Zhu, R. Effect of Rolling Temperature on the Microstructure and Mechanical Properties of AZ31 Alloy Sheet Processed through Variable-Plane Rolling. J. of Materi Eng and Perform 28, 6182–6191 (2019). https://doi.org/10.1007/s11665-019-04363-x

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  • DOI: https://doi.org/10.1007/s11665-019-04363-x

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