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Mechanical assessment of ultrafine-grained nickel by microcompression experiment and finite element simulation

机译：微压缩实验和有限元模拟的超细晶镍力学评估

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摘要

Over the past two decades, nanoindentation has been the most versatile method for mechanical testing at small length scales. Because of large strain gradients, it does not allow for a straightforward identification of material parameters such as yield and tensile strength, though. This represents a major drawback and has led to the development of alternative microscale testing techniques with microcompression as one of the most popular ones today. In this research, the influence of the realistic sample configuration and unavoidable variations in the experimental conditions is studied systematically by combing in-situ microcompression experiments on ultrafine-grained nickel and finite element simulations. It will be demonstrated that neither qualitative let alone quantitative analyses are as straightforward as they may appear, which diminishes the apparent advantages of microcompression testing.
机译：在过去的二十年中，纳米压痕已经成为小规模机械测试中用途最广泛的方法。由于应变梯度较大，因此无法直接识别材料参数，例如屈服强度和拉伸强度。这代表了一个主要的缺点，并导致了替代的微型测试技术的发展，其中微型压缩是当今最受欢迎的技术之一。在这项研究中，通过结合超细晶镍的原位微压实验和有限元模拟，系统地研究了实际样品配置和不可避免的变化在实验条件下的影响。将证明，定性分析和定量分析都不像它们看起来那样简单，这削弱了微压缩测试的明显优势。

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  • 来源
    《Journal of Materials Research》 |2012年第1期|p.266-277|共12页
  • 作者

    Ruth Schwaiger; Matthias Weber; Benedikt Moser; Peter Gumbsch; Oliver Kraft;

  • 作者单位

    Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), 76021 Karlsruhe, Germany;

    Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), 76021 Karlsruhe, Germany;

    EMPA Thun, Swiss Federal Institute for Materials Testing and Research, Laboratory for Materials Technology,3602 Thun, Switzerland Suisse Technology Partners Ltd., 8212 Neuhausen, Switzerland;

    Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), 76021 Karlsruhe, Germany Fraunhofer Institute for Mechanics of Materials IWM, 79108 Freiburg, Germany;

    Karlsruhe Institute of Technology (KIT), Institute for Applied Materials (IAM), 76021 Karlsruhe, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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