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首页> 外文期刊>Corrosion Engineering, Science and Technology >Measurement and prediction of hydrogen embrittlement in high strength carbon steel
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Measurement and prediction of hydrogen embrittlement in high strength carbon steel

机译：高强度碳钢中氢脆的测量和预测

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摘要

Hydrogen embrittlement tests were performed on 0·254 mm diameter BS 5216 M4 high strength carbon steel wire using constant loads to give initial tensile stresses in the range 48-91% ultimate tensile stress. The wires were electrolytically charged with hydrogen in 4%H2SO4 at current densities of 75 and 150 mA cm-2. The failure times at each applied stress and charging rate were displayed on Weibull statistical plots and shown to correlate with a diffusion model of hydrogen transport. At high stresses, crack initiation occurred rapidly and the failure time was controlled by the rate of inward hydrogen diffusion to maintain a threshold concentration for crack propagation. At low applied stresses, crack initiation required a higher hydrogen concentration and occurred more slowly. In this case, the failure time was controlled by the size and location of the significant microstructural flaw at which crack initiation occurred. The model enabled failure times to be predicted in specimens with differing dimensions.
机译：使用恒定载荷在直径为0·254毫米的BS 5216 M4高强度碳钢丝上进行氢脆试验，以给出初始拉伸应力为最终拉伸应力48-91％的范围。在电流密度分别为75和150 mA cm -2 的情况下，导线在4％H 2 SO 4 中用氢电解充氢。在每个施加的应力和充电速率下的失效时间显示在威布尔统计图上，并显示出与氢迁移扩散模型相关。在高应力下，裂纹萌生迅速发生，失效时间由氢的向内扩散速率控制，以保持裂纹扩展的阈值浓度。在较低的施加应力下，裂纹萌生需要更高的氢浓度，并且发生得更慢。在这种情况下，失效时间是由发生裂纹的显着微结构缺陷的大小和位置控制的。该模型可以预测具有不同尺寸的样品的失效时间。

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  • 来源
    《Corrosion Engineering, Science and Technology》 |2009年第5期|340-346|共7页
  • 作者

    Duval A.; Robinson M.;

  • 作者单位

    School of Applied Sciences, Cranfield University, Bedford MK43 OAL, UK;

    School of Applied Sciences, Cranfield University, Bedford MK43 OAL, UK, Email: m.robinson@cranfield.ac.uk;

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