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首页> 外文期刊>ISIJ international >Review of Positron Lifetime Studies of Lattice Defects Formed during Tensile Deformation in a Hydrogen Environment
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Review of Positron Lifetime Studies of Lattice Defects Formed during Tensile Deformation in a Hydrogen Environment

机译：氢气环境中拉伸变形期间形成晶格缺陷的正电子寿命研究

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摘要

The lattice defects, especially vacancies, formed during tensile deformation in a hydrogen environment have been evaluated by positron annihilation lifetime spectroscopy (PALS). The results from several such evaluations in previous studies in hydrogen-charged iron, steels, and Ni-based alloys are reviewed in this study with reference to hydrogen embrittlement models. A strong tendency to increase the positron lifetime for the vacancy cluster component, that is, the larger the vacancy cluster size, the lower the fracture strains, was found in many PALS studies on tensile-deformed metals. This suggests that plastic strain localization, a characteristic feature of hydrogen embrittlement, is consistent with hydrogen-enhanced vacancy clustering during plastic deformation. Early studies suggested that hydrogen precharging would result in a significant increase in the vacancy density, as inferred from the hydrogen content obtained from thermal desorption analysis (TDA). However, recent PALS studies have been negative, as no significant increase in vacancy density were observed.
机译：通过正电子湮没寿命光谱（PALS）评估了在氢气环境中的拉伸变形期间形成的晶格缺陷，尤其是空位。在本研究中，研究了在本研究中介绍了氢带钢，钢和Ni基合金中的几种这种评价的结果。在许多PALS研究中发现了对空位簇组分增加了空位簇组分的正电子寿命的强烈倾向，即裂缝簇越低，在许多PALS的拉伸变形金属研究中发现。这表明塑性应变定位是氢脆的特征，与塑性变形期间的氢增强空位聚类一致。早期的研究表明，从热解吸分析（TDA）中获得的氢含量推断，氢预充电将导致空位密度显着增加。然而，最近的PALS研究是阴性的，因为观察到空位密度的显着增加。

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  • 来源
    《ISIJ international》 |2021年第4期|1056-1063|共8页
  • 作者

    Kazuki SUGITA; Masataka MIZUNO; Hideki ARAKI; Yasuharu SHIRAI; Tomohiko OMURA; Kota TOMATSU; Yuji SAKIYAMA;

  • 作者单位

    Center for Atomic and Molecular Technologies Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan;

    Center for Atomic and Molecular Technologies Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan;

    Center for Atomic and Molecular Technologies Graduate School of Engineering Osaka University 2-1 Yamadaoka Suita Osaka 565-0871 Japan;

    Professor Emeritus Osaka University Professor Emeritus Kyoto University;

    Steel Research Laboratories Nippon Steel Corporation 20-1 Shintomi Futtu Chiba 293-8511 Japan;

    Advanced Technology Research Laboratories Nippon Steel Corporation 1-8 Fuso-cho Amagasaki Hyogo 660-0891 Japan;

    Steel Research Laboratories Nippon Steel Corporation 20-1 Shintomi Futtu Chiba 293-8511 Japan;

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

    hydrogen embrittlement; vacancy; lattice defects; positron annihilation lifetime spectroscopy;

    机译：氢脆;空缺;格子缺陷;正电子湮没寿命光谱;

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