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Effect of testing conditions on the compressive plasticity of bulk metallic glasses

机译：试验条件对大块金属玻璃压缩塑性的影响

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摘要

In this paper, the compressive behaviors of Zr-based bulk metallic glass (BMG) were experimentally studied under different testing conditions. To deeply reveal the inherent deformation mechanisms, numerical study was systematically conducted to analyze the shear banding evolution in BMGs, and the effect of testing machine stiffness, contact friction, and sample parallelism on the compressive ductility was therefore elucidated. Among them the effect of contact friction was carefully studied experimentally and the inherent deformation mechanisms was numerically analyzed in terms of the formation of shear bands. Free-volume theory was incorporated into ABAQUS finite element method code as a user material subroutine UMAT. The numerical method was firstly compared with the corresponding experimental results, and then parameter analyses were performed to discuss the impacts of testing conditions on the malleability of the BMG samples. The present work will shed some light on the interpretation of failure mechanisms in BMGs under different loading conditions.
机译：本文通过实验研究了Zr基块状金属玻璃（BMG）在不同测试条件下的压缩行为。为了深入揭示其固有的变形机理，系统地进行了数值研究，以分析BMG的剪切带演化，从而阐明了测试机器刚度，接触摩擦和样品平行度对压缩延性的影响。其中，通过实验仔细研究了接触摩擦的影响，并根据剪切带的形成对固有的变形机理进行了数值分析。自由体积理论已作为用户材料子例程UMAT并入ABAQUS有限元方法代码中。首先将数值方法与相应的实验结果进行了比较，然后进行了参数分析，以讨论测试条件对BMG样品延展性的影响。本工作将为不同载荷条件下BMG的失效机理的解释提供一些启示。

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  • 来源
    《Journal of Materials Research》 |2016年第17期|2686-2694|共9页
  • 作者

    Yunpeng Jiang;

  • 作者单位

    State Key Laboratory of Mechanics and Control of Mechanical, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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