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首页> 外文期刊>Materials Science and Engineering >Hydrogen-assisted cracking in 2205 duplex stainless steel: Initiation, propagation and interaction with deformation-induced martensite
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Hydrogen-assisted cracking in 2205 duplex stainless steel: Initiation, propagation and interaction with deformation-induced martensite

机译：2205双相不锈钢中的氢气辅助开裂：与变形诱导的马氏体开始，传播和相互作用

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摘要

The present work evaluates hydrogen-assisted cracking in 2205 duplex stainless steel by performing electron backscatter diffraction (EBSD) on in-situ hydrogen charged tensile tested specimens. The hydrogen embrittle-ment sensitivity increases with the electrochemical hydrogen charging time. The hydrogen presence results in deformation-induced martensite formation in the austenite during in-situ tensile straining, which starts immediately after yielding. Hydrogen-assisted cracking starts at a later stage in the tensile test and the cracks mainly initiate in austenite. The deformation-induced martensite is not vulnerable for crack initiation, neither is its interface with the austenite matrix. The presence of hydrogen-assisted cracks depends on the strain level reached in the specimen and is therefore most pronounced in the necked region. Crack propagation occurs through austenite, ferrite and their interface and is mainly governed by strain fields. Finally, propagation also occurs by coalescence of several smaller cracks.
机译：本作作品通过在原位氢气带电的拉伸试验样品上进行电子反向散射衍射（EBSD）来评估2205双相不锈钢中的氢辅助裂缝。氢气的浓度与电化学氢充电时间增加。在原位拉伸应变期间，氢气存在导致奥氏体中的奥氏体中的Martensite形成，其在屈服后立即开始。氢气辅助裂化在拉伸试验的后期开始，并且裂缝主要在奥氏体中引发。变形诱导的马氏体不容易受到裂纹引发的伤害，也不是其与奥氏体基质的界面。氢辅助裂缝的存在取决于标本中达到的应变水平，因此在颈颈区域中最明显。通过奥氏体，铁氧体及其界面发生裂纹繁殖，主要由应变场管辖。最后，繁殖也通过几个较小的裂缝的聚结会发生。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|140079.1-140079.11|共11页
  • 作者

    L. Claeys; I. De Graeve; T. Depover; K. Verbeken;

  • 作者单位

    Ghent University Department of Materials Textiles and Chemical Engineering Research Group of Sustainable Materials Science Technologiepark 46 9052 Zwijnaarde Belgium;

    Vrije Universiteit Brussel Department of Materials and Chemistry Research Group of Electrochemical and Surface Engineering Pleinlaan 2 1050 Brussels Belgium;

    Ghent University Department of Materials Textiles and Chemical Engineering Research Group of Sustainable Materials Science Technologiepark 46 9052 Zwijnaarde Belgium;

    Ghent University Department of Materials Textiles and Chemical Engineering Research Group of Sustainable Materials Science Technologiepark 46 9052 Zwijnaarde Belgium;

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  • 正文语种 eng
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  • 关键词

    Duplex stainless steel; Hydrogen embrittlement; Hydrogen-assisted cracking; EBSD;

    机译：双相不锈钢;氢脆;氢气辅助开裂;EBSD.;

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