Volume 39 Issue 5
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ZHANG Xiaopeng, YANG Chao, LI Zhenshuai, BAO Shuai, CHEN Yungui. Microstructure and Mechanical Properties of High-Silicon Heat-Resistant Mg-9Al-3Si Magnesium Alloy by Rapid Solidification and Hot Extrusion Processes[J]. Development and Application of Materials, 2024, 39(5): 31-38.
Citation: ZHANG Xiaopeng, YANG Chao, LI Zhenshuai, BAO Shuai, CHEN Yungui. Microstructure and Mechanical Properties of High-Silicon Heat-Resistant Mg-9Al-3Si Magnesium Alloy by Rapid Solidification and Hot Extrusion Processes[J]. Development and Application of Materials, 2024, 39(5): 31-38.
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Microstructure and Mechanical Properties of High-Silicon Heat-Resistant Mg-9Al-3Si Magnesium Alloy by Rapid Solidification and Hot Extrusion Processes

  • 1. Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China;

  • 2. School of Materials Science and Engineering, Sichuan University, Chengdu 610065, China;

  • 3. Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Chengdu 610065, China

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  • Received Date: March 25, 2024
  • Available Online: November 19, 2024
    Graphical Abstract
    • Abstract
  • Low yield strength and poor heat resistance are two major obstacles to the application promotion of magnesium alloys. In this study, heat-resistant high silicon Mg-9Al-3Si magnesium alloy with excellent high temperature performances is prepared by combining rapid solidification and hot extrusion processes, and its microstructure and mechanical properties are investigated. Results show that the grains of the rapidly solidified Mg-9Al-3Si ingot are refined, and that the distribution of the fine Mg2Si phase is greatly improved. The rapidly solidified Mg-9Al-3Si extruded magnesium alloy also exhibits a weak texture with a maximum textural strength of only 4.61 in the (0001) basal plane. The tensile strength, yield strength and elongation of the rapidly solidified Mg-9Al-3Si extruded magnesium alloy are 403.0 MPa, 353.0 MPa and 12% at room temperature, 203.0 MPa, 199.0 MPa and 27% at 150 ℃, and 119.0 MPa, 110.0 MPa and 30% at 200 ℃. The high-temperature strengths, especially the yield strength at 150 ℃, are excellent.
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    • References (39)
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