| 铸造镁硅合金组织和阻尼性能研究 |
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| 引用本文： | 廖利华,王浩伟,张修庆,白亮.铸造镁硅合金组织和阻尼性能研究[J].材料科学与工艺,2007,15(4):556-559. |
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| 作者姓名： | 廖利华 王浩伟 张修庆 白亮 |
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| 作者单位： | 上海交通大学,材料科学与工程学院,上海,200030;上海交通大学,材料科学与工程学院,上海,200030;上海交通大学,材料科学与工程学院,上海,200030;上海交通大学,材料科学与工程学院,上海,200030 |
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| 摘 要： | 利用动态机械热分析仪研究了四种镁硅合金的阻尼性能.研究表明:铸造镁硅合金具有良好的阻尼性能.并且体现出有别于纯镁的新阻尼特征,铸造镁硅合金具有较纯镁在更大应变振幅范围内的弛豫型内耗.由于Mg2 Si对晶界的钉扎作用,界面阻尼峰出现在较纯镁更高的温度.少量钙的添加改善了Mg2 Si析出的形态,但对阻尼性能的影响似乎不明显.
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| 关 键 词： | 铸造 镁硅合金 显微组织 阻尼性能 阻尼机理 |
| 文章编号： | 1005-0299（2007）04-0556-04 |
| 修稿时间： | 2004-09-20 |
Research on microstructure and damping capacity of cast Mg-Si alloys |
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| LIAO Li-hua,WANG Hao-wei,ZHANG Xiu-qing,BAI Liang.Research on microstructure and damping capacity of cast Mg-Si alloys[J].Materials Science and Technology,2007,15(4):556-559. |
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| Authors: | LIAO Li-hua WANG Hao-wei ZHANG Xiu-qing BAI Liang |
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| Affiliation: | School of Materials and Science Egnieering, ,Shanghai Jiaotong University, Shanghai 20003, China |
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| Abstract: | Damping capacity of Mg -Si alloys was studied by Dynamic Mechanical Thermal Analyzer instrument. The result shows that cast Mg - Si alloys have good damping capacity, and they show new damping characters different from that of pure Mg. The characteristic of relaxation - type damping of Mg - Si alloys keeps at bigger regions of strain amplitude than that of pure magnesium. Due to the strong pining, the damping peak of grain boundary shifts to higher temperature than pure magnesium. Small addition of Ca element improves the morphology of Mg2Si phase, but the effect on the damping capacity seems unobvious. |
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| Keywords: | cast Mg - Si alloys microstructure damping capacity damping mechanism |
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