Mg-3Al-1Zn-xSn镁合金的温度阻尼特性

马家轩; 韦琪; 魏福安; 乐泰和; 王金辉; 金培鹏

doi:10.15980/j.tzzz.2020.12.020

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Mg-3Al-1Zn-xSn镁合金的温度阻尼特性
Temperature Damping Characteristics of Mg-3Al-1Zn-xSn Magnesium Alloy
2020年40卷第12期页码：1405-1410
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.12.020

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[1]马家轩,韦琪,魏福安,乐泰和,王金辉,金培鹏.Mg-3Al-1Zn-xSn镁合金的温度阻尼特性[J].特种铸造及有色合金,2020,40(12):1405-1410.

Ma Jiaxuan, Wei Qi, Wei Fu’an, et al. Temperature Damping Characteristics of Mg-3Al-1Zn-xSn Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2020,40(12):1405-1410.
[1]马家轩,韦琪,魏福安,乐泰和,王金辉,金培鹏.Mg-3Al-1Zn-xSn镁合金的温度阻尼特性[J].特种铸造及有色合金,2020,40(12):1405-1410. DOI： 10.15980/j.tzzz.2020.12.020.

Ma Jiaxuan, Wei Qi, Wei Fu’an, et al. Temperature Damping Characteristics of Mg-3Al-1Zn-xSn Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2020,40(12):1405-1410. DOI： 10.15980/j.tzzz.2020.12.020.

摘要

通过熔铸法制备了Mg-3Al-1Zn-xSn（x=3

质量分数/%）合金

采用动态热分析仪（DMA）对Mg-3Al-1Zn-xSn合金进行阻尼测试

并对其高温阻尼机制进行了研究。结果表明

合金的高温阻尼机制分为两个主要阶段:弹性阻尼阶段和微塑性阻尼阶段。弹性阻尼阶段的阻尼是晶界阻尼机制和位错阻尼机制共同作用的结果

晶界激活能可用Arrhenius公式描述。微塑性变形阶段的阻尼机制主要是与频率相关的微塑性阻尼机制。

Abstract

Mg-3 Al-1 Zn-xSn alloy（x=3

in mass fraction） was prepared by melt-casting method

and damping behavior was analyzed by using dynamic thermal analyzer（DMA）

and its high-temperature damping mechanism was described. The results reveal that the high temperature damping mechanism of the alloy is divided into two main stages: the elastic damping stage and the microplastic damping stage. The damping in the elastic damping stage is attributed to the combined action of the grain boundary damping mechanism and the dislocation damping mechanism. The activation energy of the grain boundary can be described by the Arrhenius formula. The damping mechanism in the microplastic deformation stage is mainly the frequency-dependent microplastic damping mechanism.