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首页> 外文期刊>ISIJ international >Modelling of Hydrogen Diffusion in a Weld Cold Cracking Test: Part 1, Experimental Determinations of Apparent Diffusion Coefficient and Boundary Condition
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Modelling of Hydrogen Diffusion in a Weld Cold Cracking Test: Part 1, Experimental Determinations of Apparent Diffusion Coefficient and Boundary Condition

机译：焊接冷裂纹试验中氢气扩散的建模：第1部分，表观扩散系数和边界条件的实验测定

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摘要

Weld cold cracking is a kind of hydrogen embrittlement and is a serious problem when high strength steel is concerned. Cold cracking usually occurs at the area where hydrogen locally accumulates, and hence hydrogen diffusion modelling is important to understand the hydrogen distribution in a welded joint. In this paper, we conducted the permeation tests to measure the apparent diffusion coefficients of hydrogen with varying the hardness and the plastic strain of the steel. The experimental results were used to develop the empirical equation to predict the diffusion coefficient. The empirical equation is described as a function of temperature, hardness and plastic strain. Next, we measured the evolution curves of hydrogen released from the rectangular specimens. We considered the boundary condition of the surface exposed to the atmosphere, and the experimental results were used to determine the boundary condition. The empirical equation and the boundary condition obtained in this paper will be used for the numerical calculations of hydrogen diffusion in a weld cold cracking test in the companion paper.
机译：焊接冷裂纹是一种氢脆，当涉及高强度钢时是一个严重的问题。冷裂纹通常发生在局部累积的区域，因此氢气扩散建模非常重要，可以了解焊接接头中的氢气分布。在本文中，我们进行了渗透测试，以测量氢的表观扩散系数，改变钢的硬度和塑性应变。实验结果用于发展经验方程以预测扩散系数。经验方程被描述为温度，硬度和塑性应变的函数。接下来，我们测量了从矩形样本释放的氢的进化曲线。我们考虑了暴露于大气的表面的边界条件，并且使用实验结果来确定边界条件。本文中获得的经验方程和边界条件将用于伴随纸张中焊接冷裂纹试验中的氢气扩散的数值计算。

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  • 来源
    《ISIJ international》 |2021年第4期|1245-1253|共9页
  • 作者

    Tadashi KASUYA; A.Toshimitsu YOKOBORI; Go OZEKI; Toshihito OHMI; Manabu ENOKI;

  • 作者单位

    Department of Materials Engineering The University of Tokyo Tokyo 133-8656 Japan;

    Strategic Innovation Research Centre Teikyo University Tokyo 173-8605 Japan;

    Strategic Innovation Research Centre Teikyo University Tokyo 173-8605 Japan;

    Department of Mechanical Engineering Shonan Institute of Technology Kanagawa 251-8511 Japan;

    Department of Materials Engineering The University of Tokyo Tokyo 133-8656 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

    cold cracking; hydrogen diffusion; apparent diffusion coefficient; boundary condition;

    机译：冷裂纹;氢气扩散;表观漫射系数;边界条件;

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