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Deformation and fracture of explosion-welded Ti/Al plates: A synchrotron-based study

机译:爆炸焊接Ti / Al板的变形和断裂:基于同步加速器的研究

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摘要

Explosion-welded Ti/Al plates are characterized with energy dispersive spectroscopy and x-ray computed tomography, and exhibit smooth, well-jointed, interface. We perform dynamic and quasi-static uniaxial tension experiments on Ti/Al with the loading direction either perpendicular or parallel to the Ti/Al interface, using a mini split Hopkinson tension bar and a material testing system in conjunction with time-resolved synchrotron x-ray imaging. X-ray imaging and strain-field mapping reveal different deformation mechanisms responsible for anisotropic bulk-scale responses, including yield strength, ductility and rate sensitivity. Deformation and fracture are achieved predominantly in Al layer for perpendicular loading, but both Ti and Al layers as well as the interface play a role for parallel loading. The rate sensitivity of Ti/Al follows those of the constituent metals. For perpendicular loading, single deformation band develops in Al layer under quasi-static loading, while multiple deformation bands nucleate simultaneously under dynamic loading, leading to a higher dynamic fracture strain. For parallel loading, the interface impedes the growth of deformation and results in increased ductility of Ti/Al under quasi-static loading, while interface fracture occurs under dynamic loading due to the disparity in Poisson's contraction.
机译:爆炸焊接的Ti / Al板具有能量色散光谱和X射线计算机断层扫描的特征,并具有光滑,连接良好的界面。我们使用最小的霍普金森张力棒和材料测试系统以及时间分辨的同步加速器x-,在垂直于或平行于Ti / Al界面的载荷方向上对Ti / Al进行动态和准静态单轴拉伸实验。射线成像。 X射线成像和应变场作图揭示了引起各向异性大尺度响应的不同变形机制,包括屈服强度,延展性和速率敏感性。变形和断裂主要在垂直载荷的Al层中实现,但是Ti和Al层以及界面都在平行载荷中起作用。 Ti / Al的速率敏感性遵循组成金属的速率敏感性。对于垂直载荷,在准静态载荷下,Al层中会形成单个形变带,而在动态载荷下,多个形变带会同时成核,从而导致较高的动态断裂应变。对于平行载荷,在准静态载荷下,界面会阻碍形变的增长并导致Ti / Al的延展性增加;而在动态载荷下,由于泊松收缩的差异,界面会发生断裂。

著录项

  • 来源
    《Materials Science and Engineering》 |2016年第30期|308-317|共10页
  • 作者单位

    The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, PR China,Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, PR China;

    The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, PR China,CAS Key Laboratory of Materials Behavior and Design, Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, PR China;

    The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, PR China,School of Science, Wuhan University of Technology, Wuhan, Hubei 430070, PR China;

    Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA;

    Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA;

    Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA;

    School of Ocean Science and Technology, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Panjin, Liaoning 124000, PR China;

    The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, PR China,Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, PR China;

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

    Explosion welding; Dynamic tensile loading; XCT; XDIC;

    机译:爆炸焊接;动态拉伸载荷;XCT;XDIC;

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