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首页> 外文期刊>Journal of Materials Research >Hydrogen embrittlement of tungsten induced by deuterium plasma: Insights from nanoindentation tests
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Hydrogen embrittlement of tungsten induced by deuterium plasma: Insights from nanoindentation tests

机译：氘等离子体诱导的钨氢脆化：纳米压痕测试的见解

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摘要

Hydrogen exposure has been found to result in metal embrittlement. In this work, we use nanoindentation to study the mechanical properties of polycrystalline tungsten subjected to deuterium plasma exposure. For the purpose of comparison, nanoindentation tests on exposed and unexposed reference tungsten were carried out. The results exhibit a decrease in the pop-in load and an increase in hardness on the exposed tungsten sample after deuterium exposure. No significant influence of grain orientation on the pop-in load was observed. After a desorption time of t(d ) = 168 h, both the pop-in load and hardness exhibit a recovering trend toward the reference state without deuterium exposure. The decrease of pop-in load is explained using the defactant theory, which suggests that the presence of deuterium facilitates the dislocation nucleation. The increase of hardness is discussed based on two possible mechanisms of the defactant theory and hydrogen pinning of dislocations.
机译：已发现暴露于氢气会导致金属脆化。在这项工作中，我们使用纳米压痕技术研究了经受氘等离子体暴露的多晶钨的机械性能。为了进行比较，对暴露的和未暴露的参考钨进行了纳米压痕测试。结果显示，在氘暴露后，暴露的钨样品的弹入载荷降低，硬度增加。没有观察到晶粒取向对弹入载荷的显着影响。在解吸时间t（d）> = 168 h后，弹入载荷和硬度都显示出向参考状态恢复的趋势，而没有暴露于氘。爆裂载荷的减少是通过抗凝剂理论来解释的，这表明氘的存在促进了位错成核。基于清除剂理论和位错的氢钉扎的两种可能机理讨论了硬度的增加。

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  • 来源
    《Journal of Materials Research》 |2018年第20期|3530-3536|共7页
  • 作者

    Fang Xufei; Kreter Arkadi; Rasinski Marcin; Kirchlechner Christoph; Brinckmann Steffen; Linsmeier Christian; Dehm Gerhard;

  • 作者单位

    Max Planck Inst Eisenforsch GmbH, Struct & Nanomicromech Mat, D-40237 Dusseldorf, Germany;

    Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Partner Trilateral Euregio Cluster TEC, D-52425 Julich, Germany;

    Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Partner Trilateral Euregio Cluster TEC, D-52425 Julich, Germany;

    Max Planck Inst Eisenforsch GmbH, Struct & Nanomicromech Mat, D-40237 Dusseldorf, Germany;

    Max Planck Inst Eisenforsch GmbH, Struct & Nanomicromech Mat, D-40237 Dusseldorf, Germany;

    Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, Partner Trilateral Euregio Cluster TEC, D-52425 Julich, Germany;

    Max Planck Inst Eisenforsch GmbH, Struct & Nanomicromech Mat, D-40237 Dusseldorf, 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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