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首页> 外文期刊>Journal of the Mechanics and Physics of Solids >Laue micro-diffraction and crystal plasticity finite element simulations to reveal a vein structure in fatigued Cu
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Laue micro-diffraction and crystal plasticity finite element simulations to reveal a vein structure in fatigued Cu

机译：Laue微衍射和晶体可塑性有限元模拟，揭示了疲劳铜中的脉结构

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摘要

The formation of a vein during cyclic shearing of a single copper crystal oriented for single slip can be followed in transmission Laue diffraction by analyzing the spatially resolved lattice rotation evolution. Because Laue transmission integrates the signal over the thickness of the sample, the structure of the vein in the beam direction is a priori believed to be inaccessible. Here we show that the vein geometry in the beam direction can be retrieved by comparing lattice curvature tensor components from crystal plasticity finite element simulations with those experimentally derived. Virtual sectional analysis facilitates the interpretation of the measured lattice curvatures of quasi-2D dislocation structures, allowing identifying a vein morphology that is slightly vertically and horizontally inclined in the through thickness direction.
机译：可以通过分析空间分辨的晶格旋转演化，在透射劳厄衍射中跟踪在单次滑动定向的单个铜晶体的循环剪切过程中形成的静脉。因为劳厄传输在样品的整个厚度上对信号进行积分，所以在射束方向上的静脉结构被认为是先验无法获得的。在这里，我们表明可以通过比较晶体可塑性有限元模拟中的晶格曲率张量分量与实验得出的晶格曲率张量分量来检索束方向上的静脉几何形状。虚拟截面分析有助于解释准2D位错结构的测量晶格曲率，从而可以识别在整个厚度方向上略有垂直和水平倾斜的静脉形态。

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  • 来源
    《Journal of the Mechanics and Physics of Solids》 |2017年第7期|157-171|共15页
  • 作者

    Irastorza-Landa Ainara; Grilli Nicolò; Van Swygenhoven Helena;

  • 作者单位

    Swiss Light Source (SLS), Paul Scherrer Institut, Villigen PSI, Switzerland,NXMM laboratory, IMX, École Polytechnique Fédérale Lausanne (EPFL), Lausanne, Switzerland;

    NXMM laboratory, IMX, École Polytechnique Fédérale Lausanne (EPFL), Lausanne, Switzerland,Laboratory for Nuclear Materials (LNM), NES, Paul Scherrer Institut, Villigen PSI, Switzerland;

    Swiss Light Source (SLS), Paul Scherrer Institut, Villigen PSI, Switzerland,NXMM laboratory, IMX, École Polytechnique Fédérale Lausanne (EPFL), Lausanne, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Crystal plasticity finite element; Dislocations; Lattice curvatures; X-ray Laue diffraction;

    机译：晶体可塑性有限元;脱位;晶格曲率;X射线劳厄衍射;

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