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_(17)Al_(12)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。
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_(17)Al_(12) 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.
作者
鲁若鹏
姚珂宇
李昆
焦凯
赵宇宏
侯华
Lu Ruopeng;Yao Keyu;Li Kun;Jiao Kai;Zhao Yuhong;Hou Hua(School of Materials Science and Engineering,North University of China)
出处
《特种铸造及有色合金》
CAS
北大核心
2020年第11期1195-1198,共4页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51801189,51774254,51774253,51701187,51674226,51804279)
山西省科技重大专项资助项目(20191102008,20181101014)
山西省高等学校科技创新资助项目(2019L0523)
山西省平台基地和人才专项资助项目(201805D211036)
中央引导地方科技发展专项资金资助项目(YDZX20191400002796)
山西省科技成果转化引导专项资助项目(201804D131039)
关键词
镁合金
阻尼性能
固溶原子
位错
Magnesium Alloy
Damping Properties
Solution Atoms
Dislocations
作者简介
第一作者:鲁若鹏,男,1988年出生,讲师,太原(030051),电话:13613463280,E-mail:lurpzbdx@nuc.edu.cn;通信作者:侯华,男,1972年出生,教授,太原(030051),电话:0351-3557118,E-mail:houhua@nuc.edu.cn
