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Home > Archive>Volume 50, Issue 2, 2021 >488-496. DOI:10.12442/j.issn.1002-185X.20200064
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Microstructure and mechanical properties of as-aged Mg-Gd-Zn-Zr-Ag alloy with different contents of Al and Li
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The National Key Technologies R&D Program of China;National Natural Science Foundation of China ;Fundamental Research Funds for the Central Universities

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    Abstract:

    In this work，the microstructure evolution and mechanical properties of Mg-12Gd-1Zn-0.5Zr-0.5Ag (in wt.%) alloys with different contents of Al and Li elements by T6 heat treatment were investigated. The results indicate that new Mg3Gd particles are precipitated in Mg-12Gd-1Zn-0.5Zr-0.5Ag alloy and most Al2Li3 phases in Mg-12Gd-4Al-3Li-1Zn-0.5Zr-0.5Ag and Mg-12Gd-6Al-5Li-1Zn-0.5Zr-0.5Ag alloys become smaller and more evenly distributed after T6 heat treatment. The grain size and c/a ratio values of the as-aged Mg-12Gd-4Al-3Li-1Zn-0.5Zr-0.5Ag alloy and Mg-12Gd-6Al-5Li-1Zn-0.5Zr-0.5Ag alloy are decreased significantly than that of as-aged Mg-12Gd-1Zn-0.5Zr-0.5Ag alloy, which results in improved tensile strength and plasticity. The best combination of tensile strength, elastic modulus and plasticity is as-aged Mg-12Gd-6Al-5Li-1Zn-0.5Zr-0.5Ag alloy, the ultimate tensile strength, modulus and ductility are 210 MPa, 50.7 GPa and 24.8%, respectively.

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[Tu Teng, Chen Xianhua, Zhang Lijuan, Zhao Chaoyue, Luo Zhu, Dai Yan, Pan Fusheng. Microstructure and mechanical properties of as-aged Mg-Gd-Zn-Zr-Ag alloy with different contents of Al and Li[J]. Rare Metal Materials and Engineering,2021,50(2):488~496.]
DOI：10.12442/j. issn.1002-185X.20200064

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History
  • Received:February 04,2020
  • Revised:May 11,2020
  • Adopted:May 27,2020
  • Online: March 09,2021

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