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Composition mediated serration dynamics in Zr-based bulk metallic glasses

机译：锆基大块金属玻璃中成分介导的锯齿动力学

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摘要

The composition mediated serration dynamics in Zr-based bulk metallic glasses (BMGs) is investigated by statistics analyses of the elastic-energy density, and free volumes during shear-banding are beneficial to understand serrated-flow behavior. The amplitude and elastic-energy density display a gradually increasing and then decreasing trend with increasing the content of Zr. It is based on the free-volume theory describing the atomic-level structure of ternary Zr-Cu-Al BMGs. The good agreement between the molecular dynamics simulation and experimental results provides evidence for the variation of free volumes as the elementary mechanism of composition mediated serration dynamics.
机译：通过对弹性能密度的统计分析，研究了Zr基块状金属玻璃（BMGs）中由成分介导的锯齿动力学，而剪切带过程中的自由体积有利于理解锯齿流动行为。随着Zr含量的增加，振幅和弹性能密度呈现出逐渐增大然后减小的趋势。它基于描述Zr-Cu-Al三元BMG原子级结构的自由体积理论。分子动力学模拟与实验结果之间的良好一致性为自由体积的变化作为组成介导的锯齿动力学的基本机理提供了证据。

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  • 来源
    《Applied Physics Letters》 |2015年第20期|201902.1-201902.5|共5页
  • 作者

    Z. Wang; J. W. Qiao; H. Tian; B. A. Sun; B. C. Wang; B. S. Xu; M. W. Chen;

  • 作者单位

    Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;

    Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;

    College of Computer Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China;

    Center for Advanced Structural Materials, Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong;

    Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;

    Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;

    Laboratory of Applied Physics and Mechanics of Advanced Materials, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China ,Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan;

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