铝含量对镁合金阻尼性能的影响

鲁若鹏; 姚珂宇; 李昆; 焦凯; 赵宇宏; 侯华

doi:10.15980/j.tzzz.2020.11.004

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铝含量对镁合金阻尼性能的影响
Influences of Trace Aluminum on the Damping Performance of Magnesiumy Alloy
2020年40卷第11期页码：1195-1198
纸质出版日期： 2020 ，
DOI： 10.15980/j.tzzz.2020.11.004

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[1]鲁若鹏,姚珂宇,李昆,焦凯,赵宇宏,侯华.铝含量对镁合金阻尼性能的影响[J].特种铸造及有色合金,2020,40(11):1195-1198.

Lu Ruopeng, Yao Keyu, Li Kun, et al. Influences of Trace Aluminum on the Damping Performance of Magnesiumy Alloy[J]. Special Casting & Nonferrous Alloys, 2020,40(11):1195-1198.
[1]鲁若鹏,姚珂宇,李昆,焦凯,赵宇宏,侯华.铝含量对镁合金阻尼性能的影响[J].特种铸造及有色合金,2020,40(11):1195-1198. DOI： 10.15980/j.tzzz.2020.11.004.

Lu Ruopeng, Yao Keyu, Li Kun, et al. Influences of Trace Aluminum on the Damping Performance of Magnesiumy Alloy[J]. Special Casting & Nonferrous Alloys, 2020,40(11):1195-1198. DOI： 10.15980/j.tzzz.2020.11.004.

摘要

研究了Al含量对纯镁阻尼性能的影响。结果表明

Al添加量较低时

其主要以固溶形式存在

并不会明显降低镁合金的阻尼;当Al含量较高时

合金出现Mg

第二相并能细化晶粒

合金的阻尼性能大幅降低;合金阻尼临界脱钉应变随着Al含量增大而提高。在升温阻尼过程中

Mg-0.25Al合金在60℃和260℃分别出现位错峰和晶界内耗峰

Al固溶原子的增加会阻碍阻尼峰的出现。

Abstract

The influences of different Al content on the damping performance of pure magnesium were investigated. The results show that with a lower Al addition

the Al atoms mainly exist in form of solid solution atoms and it will not significantly reduce the damping behavior of the magnesium alloy

while with a higher Al content

a second phase Mg

can be observed in the alloy to refine the grains

meanwhile the damping performance of the alloy is greatly reduced. The critical damping strain of the alloy is increased with the increase of Al content. In heating damping

the Mg-0.25 Al alloy has dislocation peaks and grain boundary internal friction peaks at 60 ℃ and 260 ℃

respectively. The increase of Al solid solution atoms will hinder the appearance of damping peaks.