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X-ray quantitative analysis on spallation response in high purity copper under sweeping detonation

机译：X射线定量分析高纯铜在爆炸下的散裂响应

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摘要

The 3-D quantitative investigation of spall behavior in high purity copper plants with different heat treatment histories was characterized using X-ray computer tomography (XRCT). The effect of shock stress and grain size on the spatial distribution and morphology of incipient spall samples were discussed. The results revealed that, in samples with similar microstructure, the ranges of void distribution decrease with the increasing of shock stress. The characteristic parameters (such as mean elongation, mean flatness and mean sphericity of voids) determined using XRCT herein as a function of shock stress and grain size. The quantitative analyses of spallation datasets render functional relationships between the microscopic parameters (like volume, frequency) of spallation voids and the microstructure. The XRCT observations show that voids are prone to coalescence in thermo-mechanical treatments (TMT) sample, while the final maximum and mean volume of void were smaller than that of annealed sample. This is due to the smaller grain size of TMT sample, which means more nucleation sites of voids, this made the voids get closer and easier to coalescence, and flat voids formed ultimately.
机译：使用X射线计算机断层扫描（XRCT）表征了具有不同热处理历史的高纯度铜厂中剥落行为的3-D定量研究。讨论了冲击应力和晶粒度对初始剥落样品的空间分布和形态的影响。结果表明，在具有相似组织的样品中，空隙分布的范围随着冲击应力的增加而减小。本文中使用XRCT确定的特征参数（例如平均延伸率，平均平面度和平均球形度）是冲击应力和晶粒尺寸的函数。剥落数据集的定量分析提供了剥落空隙的微观参数（如体积，频率）与微观结构之间的功能关系。 XRCT的观察结果表明，热机械处理（TMT）样品中的空隙易于聚结，而最终的最大空隙和平均体积小于退火样品的空隙。这是由于TMT样品的晶粒更小，这意味着空隙的成核位置更多，这使得空隙变得更容易聚结，最终形成平坦的空隙。

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  • 来源
    《Materials Science and Engineering》 |2016年第14期|54-60|共7页
  • 作者

    Yang Yang; Jixiong Chen; Zhiqiang Peng; Zhaoliang Guo; Tiegang Tang; Haibo Hu; Yanan Hu;

  • 作者单位

    School of Material Science and Engineering, Central South University, Changsha 410083, China,Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China,National Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China,Key Laboratory of Nonferrous Metals Material Science and Engineering of Ministry of Education, Central South University, Changsha 410083, China;

    School of Material Science and Engineering, Central South University, Changsha 410083, China;

    School of Material Science and Engineering, Central South University, Changsha 410083, China;

    Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;

    Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;

    Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Sweeping detonation; Spallation; XRCT; High purity copper;

    机译：清扫爆炸;散裂;XRCT;高纯铜;

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