Quantitative monitoring of the environmental hydrogen embrittlement of Al-Zn-Mg-based aluminum alloys via dynamic hydrogen detection and digital image correlation
Quantitative monitoring of the environmental hydrogen embrittlement of Al-Zn-Mg-based aluminum alloys via dynamic hydrogen detection and digital image correlation
复制标题
通过动态氢检测和数字图像关联定量监测Al-Zn-Mg基铝合金的环境氢脆
DOI：
10.1016/j.scriptamat.2021.113853
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发表时间：
2021
影响因子：
6
通讯作者：
Horikawa Keitaro
中科院分区：
文献类型：
--
作者：
高木智人;小幡亜希子;春日敏宏;忠永清治;Horikawa Keitaro
本研究开发了一种新的分析系统，用于动态、定量地监测铝锌镁基铝合金在大气压下的环境氢脆。该系统包括使用基于SnO2的半导体氢传感器的气相色谱，数字图像相关步骤，以及使用慢应变速率测试机。该系统的使用表明，Al-Zn-Mg合金在空气中的水蒸气与无氧化膜的合金表面发生化学反应，在塑性变形过程中产生氢原子。数字图像相关还表明，产生的氢原子在试件表面造成了大量的局域晶界裂纹，导致了局域晶界断裂。脆化断口析出的氢原子量是未脆化断口的2.7倍。
In this study, a novel analytical system was developed to monitor the environmental hydrogen embrittlement of Al-Zn-Mg-based aluminum alloys dynamically and quantitatively under atmospheric air pressure. The system involves gas chromatography using a SnO2-based semiconductor hydrogen sensor, a digital image correlation step, and the use of a slow strain rate testing machine. Use of this system revealed that hydrogen atoms are generated during the plastic deformation of Al-Zn-Mg alloys caused by the chemical reaction between the water vapor in air and the alloy surface without oxide films. Digital image correlation also clarified that the generated hydrogen atoms caused numerous localized grain boundary cracks on the specimen surface, resulting in a localized grain boundary fracture. The amount of hydrogen atoms evolved from the embrittled fracture surface was 2.7 times as high as that from the surface without embrittlement.