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Deformation behavior of multilayered NiFe with bimodal grain size distribution at room and elevated temperature

机译:室温和高温下具有双峰粒度分布的多层镍铁的变形行为

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摘要

We describe a study of the temperature dependent deformation behavior of a multilayered NiFe-60 wt% Fe alloy with a layer thickness of 5 μm fabricated by electrodeposition. The structure of adjacent layers alternates between a nanocrystalline and a coarse grained. Uniaxial tensile tests at temperature between 20 ℃ and 400 ℃ and strain rate of 10~(-4)-10~(-2) were used to determine the mechanical behavior. Mi-crostructure observations via transmission electron microscopy and fractography were performed to provide insight into the underlying deformation mechanism. The mechanical behavior is discussed in the context of the bimodal microstructure of multilayered samples and the contribution of each sub-layer to strength and ductility. The results reveal that even at higher temperatures the nanocrystalline layer determines the mechanical performance of multilayered materials.
机译:我们描述了通过电沉积制造的厚度为5μm的多层NiFe-60 wt%Fe合金的温度依赖性变形行为的研究。相邻层的结构在纳米晶体和粗糙晶粒之间交替。采用20℃至400℃的单轴拉伸试验,以10〜(-4)-10〜(-2)的应变速率测定其力学性能。通过透射电子显微镜和分形术进行微观结构观察,以提供对潜在变形机制的了解。在多层样品的双峰微观结构以及每个子层对强度和延展性的贡献的背景下讨论了力学行为。结果表明,即使在较高温度下,纳米晶体层也决定了多层材料的机械性能。

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  • 来源
    《Materials Science and Engineering》 |2016年第22期|174-183|共10页
  • 作者单位

    Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95817, USA;

    Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843-3128, USA;

    Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95817, USA;

    Integran Technologies Inc., Toronto, Canada;

    Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843-3128, USA;

    Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95817, USA,Department of Chemical Engineering and Materials Science, University of California, Irvine, CA 92697, USA;

    Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95817, USA;

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

    Multilayered material; Tensile tests; Elevated temperature; Deformation mechanism;

    机译:多层材料;拉伸试验;温度升高;变形机制;

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