万迪庆,王锦程.高阻尼镁合金Mg-0.6%Zr和Mg-Ni中内耗峰分析[J].稀有金属材料与工程,2017,46(10):2790~2793.[Wan Diqing,Wan Jincheng.Illustration of internal friction peaks observed in Mg-0.6%Zr and Mg-Ni high damping magnesium alloys[J].Rare Metal Materials and Engineering,2017,46(10):2790~2793.]
高阻尼镁合金Mg-0.6%Zr和Mg-Ni中内耗峰分析
投稿时间:2015-09-29  修订日期:2015-11-23
中文关键词:  高阻尼  镁合金  内耗峰
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      在高阻尼镁合金研究中,发现了与合金室温下高阻尼性能有关的宽的弛豫内耗峰,该峰为位错内耗峰;该峰是基面位错在热激活作用下运动与点缺陷(空位与溶质原子)相互作用产生。同时在高阻尼合金Mg-Ni和Mg-0.6%Zr中发现了晶界内耗峰。有必要指出的是合金的显微组织会影响晶界弛豫:随着Ni的质量分数增加,晶粒细化同时晶界内耗峰向低温处迁移;同Mg-0.6%Zr合金相比,加入少量的Y后,Mg-0.6%Zr-Y合金晶界弛豫峰向高温处推进。
Illustration of internal friction peaks observed in Mg-0.6%Zr and Mg-Ni high damping magnesium alloys
英文关键词:high damping  magnesium alloys  internal friction
英文摘要:
      A broad relaxation peak, which contributes to the high damping capacity around room temperature, has been obtained in all our investigated high damping magnesium alloys. This peak is a dislocation-related relaxation peak, which is probably caused by the interaction between dislocation and point defects (vacancy and solid atoms) during the dislocation movement on the basal plane actived by thermal. The grain boundary relaxation peak also has been observed in both Mg-Ni and Mg-0.6%Zr high damping alloys. However, it is necessary to point out that microstructure can affect the gain boundary relaxation. With Ni content increasing, the grain is refined and the grain boundary internal friction peak shifts to lower temperature. Compared with Mg-0.6%Zr alloy, the grain boundary internal friction peak shifts to higher temperature after adding a little yttrium(Y).
作者单位E-mail
万迪庆 西北工业大学凝固技术国家重点实验室 divadwan@163.com 
王锦程 西北工业大学凝固技术国家重点实验室  
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