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首页> 外文期刊>ISIJ international >Hydrogen Distribution Permeated through a Duplex Stainless Steel Detected by Hydrogen Microprint Technique
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Hydrogen Distribution Permeated through a Duplex Stainless Steel Detected by Hydrogen Microprint Technique

机译：通过通过氢微胶体技术检测的双链不锈钢渗透的氢气分布

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摘要

To provide reliable relationship between hydrogen embrittlement (HE) and hydrogen distribution, a duplex stainless steel (DSS: JIS SUS329J4L) annealed and electrolytically hydrogen-charged was investigated by means of hydrogen microprint technique (HMPT), where distribution of hydrogen was examined on the opposite side of the charged surface. Quantitative analysis was made by classifying the site of detected hydrogen into three categories: ferrite matrix, austenite grain and phase boundary. The HMPT was performed on the 1.5 h and 24 h charged specimens with two holding times in the ambient air for 0.5 (as quick as possible) and 300 h. In the 1.5 h charged and 0.5 h held specimen, hydrogen atoms were mostly detected on the phase boundary. When charging time was increased to 24 h, relative fraction of hydrogen desorbed in the austenite phase against the ferrite matrix and phase boundary increased. The relative fraction of hydrogen atoms in the austenite phase was also increased by increasing holding time to 300 h irrespective of the charging time. During the holding, hydrogen atoms inside the ferrite matrix were presumed to preferentially diffuse out from the specimen or transferred to the phase boundary, while hydrogen atoms already trapped at the phase boundary will move into the interior of the austenite phase. The results obtained in the present study where experimental conditions are systematically selected can be rationally interpreted only with the higher solubility and smaller diffusivity of hydrogen in the austenite phase, rather than considering the binding energy of hydrogen with phase boundary.
机译：为了提供氢气脆化（HE）和氢气分布之间的可靠关系，通过氢微胶体技术（HMPT）研究了一种双相不锈钢（DSS：JIS SUS329J4L），其中研究了氢的分布的分布带电表面的另一侧。通过将检测到的氢气分为三类：铁氧体基质，奥氏体晶粒和相边界来进行定量分析。 HMPT在1.5小时和24小时的带电标本上进行，在环境空气中有两个保持时间为0.5（尽可能快）和300小时。在1.5小时的带电和0.5小时固定标本中，在相边界上最大地检测到氢原子。当充电时间增加到24小时时，抵抗铁氧体基质和相边界中解吸在奥氏体相中的氢的相对部分增加。通过增加保持时间至300小时，也增加了奥氏体相中奥氏体相中奥氏体相中的相对级分。在保持期间，假定在铁氧体基质内部的氢原子从试样中优先扩散或转移到相边界，而已经捕获在相边界的氢原子将进入奥氏体相的内部。在本研究中获得的结果，其中系统地选择实验条件，仅在奥氏体相中氢的较高的溶解度和较小的扩散性，而不是考虑到相位边界的氢的结合能量。

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