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Influence of Rolling Temperature on the Mechanical Properties and Microstructure of Variable-Plane-Rolled Mg-3Al-1Zn Alloy

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Abstract

AZ31 magnesium alloy was produced via variable-plane rolling (VPR) under different temperatures. The effects of rolling temperature on the microstructure, texture and mechanical properties were investigated. A double-peak basal texture was formed during VPR treatment. Dynamic recrystallization (DRX) was observed during the VPR treatment, and it can reduce the texture intensity owing to the coalescence of sub-grains. Four types of twins were observed in the VPR treatment: {10-12} extension twins, {10-13}, {10-11} contraction twins and {10-11}-{10-12} double twins. The suitable temperature of AZ31 magnesium alloy for VPR treatment is determined as 623 K through experiments with tensile yield strength of 240 MPa, compressive yield strength of 162 MPa and elongation of 13%. Owing to the important impact of temperature on mechanical properties, the alloy was further VPRed with a decrease in temperature pass-by-pass. The high temperature of 623 K at the initial passes randomized the texture, which led to notably high ductility.

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Acknowledgment

This work was financially supported by scientific research training fund (the BQW plan) of the Nan**g University of Science and Technology (No. 201710288074), Natural Science Foundation of Jiangsu Province (No. BK20161582), Jiangsu Overseas Research & Training Program for University Prominent Young and Middle-aged Teachers and Presidents and Scientific Research Foundation of the Nan**g Communications Institute of Technology, China.

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Correspondence to Rong Zhu.

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Wang, Z., Mamatzunun, M., Wu, Y. et al. Influence of Rolling Temperature on the Mechanical Properties and Microstructure of Variable-Plane-Rolled Mg-3Al-1Zn Alloy. J. of Materi Eng and Perform 28, 1772–1779 (2019). https://doi.org/10.1007/s11665-019-03887-6

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  • DOI: https://doi.org/10.1007/s11665-019-03887-6

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