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首页> 外文期刊>Materials Science and Engineering >Strain rate-dependent compress ive deformation and failure behavior of porous SiC/Ti-based metallic glass composite
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Strain rate-dependent compress ive deformation and failure behavior of porous SiC/Ti-based metallic glass composite

机译:应变率相关的多孔SiC / Ti基金属玻璃复合材料的压缩变形和破坏行为

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摘要

The deformation and failure behavior of a porous SiC/Ti-based metallic glass composite were investigated under uniaxial compression over a wide strain rate range (~10~(-5) to ~10~3 s~(-1)). Both the metallic glass and the SiC phase exhibited a three-dimensional (3D) interconnected net structure. The composite showed positive strain rate sensitivity when the strain rate increased from ~10~(-5) to ~10~(-3) s~(-1) under quasi-static compression as well as from 1.7 × 10~3 to 3.4 × 10~3 s~(-1) under dynamic compression. However, the fracture strength of the composite during quasi-static compression was much greater than that during dynamic compression. The fracture mode of the composite was a mixture of shearing and axial splitting under both quasi-static and dynamic compressions; the main cracks initiated at the interface between the two phases or within the SiC phase. The SiC phase and the metallic glass phase were highly constrained by each other, leading to a complicated stress state in the composite. The composite failed earlier under dynamic compression due to the cracks being initiated and propagated more quickly in comparison with quasi-static compression.
机译:研究了多孔SiC / Ti基金属玻璃复合材料在较宽的应变速率范围(〜10〜(-5)至〜10〜3s〜(-1))下的单轴压缩变形和破坏行为。金属玻璃和SiC相均表现出三维(3D)互连的网状结构。在准静态压缩下,应变率从〜10〜(-5)增至〜10〜(-3)s〜(-1)时,应变率从1.7×10〜3增至3.4,复合材料表现出正应变率敏感性。动态压缩下×10〜3 s〜(-1)但是,复合材料的准静态压缩断裂强度远大于动态压缩时的断裂强度。复合材料的断裂模式是在准静态和动态压缩下剪切和轴向分裂的混合物。主要裂纹始于两相之间的界面或SiC相内部。 SiC相和金属玻璃相彼此高度约束,导致复合材料中复杂的应力状态。复合材料在动态压缩下较早地破裂,这是因为与准静态压缩相比,裂纹的萌生和扩展更快。

著录项

  • 来源
    《Materials Science and Engineering》 |2014年第15期|53-59|共7页
  • 作者单位

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China,National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China,National Key Laboratory of Science and Technology on Materials under Shock and Impact, Beijing 100081, China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;

    School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;

    Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;

    Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;

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

    Composite; Porous SiC; Metallic glass; Stain rate; Failure behavior;

    机译:综合;多孔SiC;金属玻璃;染色率;失败行为;

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