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Effect of Heat Treatment on the Microstructure and Mechanical Properties of Mg-6Zn-1Al-0.3Mn Magnesium Alloy

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Abstract

The microstructure and mechanical properties of Mg-6Zn-1Al-0.3Mn under different heat treatments were investigated. The results show that the two-stage solution treatment is obviously better than single-stage solution treatment, and all the MgZn phases nearly dissolve into the matrix after 335 °C × 4 h + 385 °C × 8 h solution treatment. Both the solution treatment and the aging time have an important effect on the number and size of rod-shaped β`1 during the aging treatment. In a word, after the 335 °C × 4 h + 385 °C × 8 h + 175 °C × 8 h heat treatment, the β`1 phase uniformly distributes in the matrix with the highest number density and a length of 50 nm, and the alloy exhibits the best mechanical properties—the tensile strength and the yield strength reach to 279.2 ± 1.1, 170.8 ± 3.1 MPa, respectively, and the elongation is 15.3 ± 0.7%.

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Acknowledgements

This work was financially supported by the National Key Research and Development Program of China (No. 2021YFB3701102), the Key research and development plan of Shandong province (No.2019JZZY020329), the National Key Research and Development Program of China (No.2016YFB0301105), Natural Science Foundation of Liaoning Province (No.2020-MS-013) and DongGuan Innovative Research Team Program (2020607134012).

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Authors and Affiliations

  1. Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China

    Tianjiao Luo, Chenye Liu, Jianguang Feng, Yingju Li, Xiaohui Feng, Ce Zheng, Qiuyan Huang & Yuansheng Yang

  2. School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China

    Tianjiao Luo, Chenye Liu, Jianguang Feng, Yingju Li & Xiaohui Feng

  3. Dongguan EONTEC Co.Ltd, Guangdong, 523662, China

    Weirong Li

  4. Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, China

    Yuansheng Yang

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  1. Tianjiao Luo
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This invited article is part of a special topical focus in the Journal of Materials Engineering and Performance on Magnesium. The issue was organized by Prof. C. (Ravi) Ravindran, Dr. Raja Roy, Mr. Payam Emadi, and Mr. Bernoulli Andilab, Ryerson University.

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Luo, T., Liu, C., Feng, J. et al. Effect of Heat Treatment on the Microstructure and Mechanical Properties of Mg-6Zn-1Al-0.3Mn Magnesium Alloy. J. of Materi Eng and Perform 32, 2561–2568 (2023). https://doi.org/10.1007/s11665-022-07230-4

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