Effects of Al content and aging time on mechanical properties and damping capacity of Mg-Al magnesium alloys

doi:10.13251/j.issn.0254-6051.2023.08.005

Abstract

Abstract: Effects of aluminum content and aging time on microstructure and properties of Mg-Al magnesium alloys were studied by metallographic microscope and dynamic mechanical analyzer. The results indicate that with the increase of Al content and aging time, the volume fraction of β-Mg₁₇Al₁₂ phase continues to increase, the strength of Mg-Al magnesium alloys continues to increase. The damping capacity of AZ31 magnesium alloy is higher than that of AZ61 and AZ80 alloys due to its fewer solute atoms and larger grain size. As the aging time increases, the damping capacity of Mg-Al alloys increases with the increase of β-Mg₁₇Al₁₂ content. The damping capacity of Mg-Al alloys increases on the whole with the temperature raising. Due to the occurrence of grain boundary slip (GBS), the damping capacity is improved significantly above 250 ℃, and the damping peak of aged AZ80 alloy appears when the temperature is about 330 ℃.

Key words: Mg-Al magnesium alloys, Al content, aging time, microstructure, damping capacity, mechanical properties

CLC Number:

TG146.2

Wu Yang, Qian Yafeng, Zhao Yanhui. Effects of Al content and aging time on mechanical properties and damping capacity of Mg-Al magnesium alloys[J]. Heat Treatment of Metals, 2023, 48(8): 30-34.

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