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首页> 外文期刊>ISIJ international >Analysis of Hydrogen Trapping by Gaussian Distribution for Normalized Carbon Steels
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Analysis of Hydrogen Trapping by Gaussian Distribution for Normalized Carbon Steels

机译：基于高斯分布的正火碳钢的氢捕集分析。

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摘要

For the basis of understanding hydrogen embrittlement, hydrogen thermal desorption curves are subjected to the analysis for making clear the kinds and amounts of traps in normalized carbon steels that are composed of ferrite and pearlite. While the theoretical desorption curves should be analyzed basically by non-symmetrical curves such as obtained by Kissinger equation, the measured curves are also deformed and approach to symmetrical form. Actually they are successfully fitted by combination of two symmetrical Gaussians; one is desorption from dislocation trap and the other is from grain boundary trap. Applying this method to different heats of JIS S45C steel, grain boundary trap of high phosphorus content shifts to higher temperature side, suggesting that hydrogen trap is enhanced by phosphorus segregation along grain boundary. An increase in cathodic current density causes more hydrogen partition to grain boundary. Analysis with the use of Gaussian is practical and reasonable to understand the properties of hydrogen traps.
机译：为了理解氢脆化，对氢热解吸曲线进行分析，以弄清由铁素体和珠光体组成的正火碳钢中陷阱的种类和数量。虽然理论上的解吸曲线应基本通过非对称曲线（如通过基辛格方程式获得）进行分析，但测得的曲线也会变形并趋于对称形式。实际上，通过两个对称高斯的组合成功地拟合了它们；一种是位错阱解吸，另一种是晶界阱解吸。将这种方法应用于不同的JIS S45C钢中，高磷含量的晶界陷阱向高温侧移动，这表明氢沿晶界偏析而增强了氢陷阱。阴极电流密度的增加导致更多的氢分配到晶界。使用高斯进行分析对于理解氢阱的性质是实用且合理的。

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