| 结构弛豫对Zr_(64.13)Cu_(15.75)Ni_(10.12)Al_(10)块体非晶合金硬度和剪切带特征的影响 |
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| 引用本文： | 谷建生,魏炳忱,李磊,张进军,孙祉伟.结构弛豫对Zr_(64.13)Cu_(15.75)Ni_(10.12)Al_(10)块体非晶合金硬度和剪切带特征的影响[J].稀有金属材料与工程,2008(Z4). |
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| 作者姓名： | 谷建生 魏炳忱 李磊 张进军 孙祉伟 |
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| 作者单位： | 中国科学院力学研究所国家微重力实验室; |
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| 基金项目： | 国家自然科学基金(50571109,50731008,50771102); 国家重点基础研究发展计划资助(2007CB613905) |
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| 摘 要： | 通过接近玻璃转变温度的等温退火获得不同弛豫状态的Zr64.13Cu15.75Ni10.12Al10块体非晶合金样品。利用维氏显微硬度计和洛氏硬度计研究结构弛豫对合金硬度和压痕周围剪切带特征的影响规律。结果表明:在590K等温退火处理使Zr64.13Cu15.75Ni10.12Al10块体非晶合金发生焓弛豫行为,其维氏显微硬度随退火时间的延长较快增加后趋于稳定,而大载荷洛氏硬度对结构弛豫不敏感。通过洛氏压痕周围剪切带特征的研究,定量比较了结构弛豫对剪切带间距、数量的影响规律。
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| 关 键 词： | 块体非晶合金 结构弛豫 自由体积 硬度 剪切带 |
Effect of Structural Relaxation on Hardness and Shear Band Features of Zr_(64.13)Cu_(15.75)Ni_(10.12)Al_(10) Bulk Metallic Glass During Indentation |
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| Gu Jiansheng,Wei Bingchen,Li Lei,Zhang Jinjun,Sun Zhiwei.Effect of Structural Relaxation on Hardness and Shear Band Features of Zr_(64.13)Cu_(15.75)Ni_(10.12)Al_(10) Bulk Metallic Glass During Indentation[J].Rare Metal Materials and Engineering,2008(Z4). |
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| Authors: | Gu Jiansheng Wei Bingchen Li Lei Zhang Jinjun Sun Zhiwei |
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| Affiliation: | Gu Jiansheng,Wei Bingchen,Li Lei,Zhang Jinjun,Sun Zhiwei (National Microgravity Laboratory,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100080,China) |
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| Abstract: | Structural relaxation of Zr64.13Cu15.75Ni10.12Al10 bulk metallic glass (BMG) was conducted through isothermal annealing at the temperature near glass transition. Vickers hardness and Rockwell hardness tests were used to study the structure relaxation effect on the hardness and shear band features of the BMG. The results show that Zr64.13Cu15.75Ni10.12Al10 BMG underwent enthalpy relaxation due to pre-annealing at 590 K. Vickers hardness increases quickly upon pre-annealing and tends to grow slowly with furth... |
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| Keywords: | bulk metallic glass structural relaxation free volume hardness shear band |
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