Evaluation of Hydrogen Embrittlement by Internal High-Pressure Hydrogen Environment in Specimen
Evaluation of Hydrogen Embrittlement by Internal High-Pressure Hydrogen Environment in Specimen
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试样内部高压氢环境氢脆评价
DOI：
10.2320/jinstmet.72.125
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发表时间：
2008
影响因子：
--
通讯作者：
T. Ogata
中科院分区：
文献类型：
--
作者：
T. Ogata
开发了一种在高压氢气环境下材料机械性能的简单测试方法。该方法不需要任何高压容器，而是在样品孔内产生高压氢气环境。样品温度很容易受外部环境控制。 SUS304 和 304L 在 298、190 和 77 K 下氢环境脆化 (HEE) 的影响通过在氢气中拉伸试验中获得的断面收缩率与在氦气中获得的断面收缩率进行评估。通过该测试方法的评价结果与使用高压容器的通常方法的结果非常吻合。样品上的孔通过放电、线切割和珩磨加工而成。比较了这些工艺中表面粗糙度对 HEE 的影响，发现线切割加工足以满足这种新方法的需要。 HEE随温度和氢断裂面的变化证明了这种新的简单方法的有效性。
A simple testing method for mechanical properties of materials in high-pressure hydrogen environments has been developed. This method does not require any high-pressure vessel but the high-pressure hydrogen environment is produced inside the hole in the specimen. The specimen temperature is easily controlled by outside environment. The effects of hydrogen environment embrittlement (HEE) for SUS304 and 304L at 298, 190, and 77 K were evaluated by the ratio of reduction of area obtained in tensile tests in hydrogen to that obtained in helium. The results of the evaluation by this testing method agreed fairly well with the results by the usual method using a high pressure vessel. The hole in the specimen was machined by electric discharge, wire-cut, and honing. The influence of surface roughness on HEE was compared among these processes and the wire-cut machining was found to be enough for this new method. Changes of HEE with temperature and fracture surface by hydrogen proved the usefulness of this new simple method.