晶粒尺寸对纯铁氢损伤及氢脱附行为的影响

doi:10.13251/j.issn.0254-6051.2025.03.033

金属热处理 ›› 2025, Vol. 50 ›› Issue (3): 208-213.DOI: 10.13251/j.issn.0254-6051.2025.03.033

晶粒尺寸对纯铁氢损伤及氢脱附行为的影响

闫英杰^1,2, 向兴勇^1,2, 张钰昆^1,2, 曹睿^1,2

1.兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室, 甘肃兰州 730050;
2.兰州理工大学材料科学与工程学院, 甘肃兰州 730050

收稿日期:2024-09-22 修回日期:2025-01-15 出版日期:2025-03-25 发布日期:2025-05-14
作者简介:闫英杰(1981—),男,副研究员,博士,主要研究方向为金属氢脆及材料强韧化,E-mail:yjyan@lut.edu.cn
基金资助:
国家自然科学基金(51961024,52071170,52175325)

Effect of grain size on hydrogen damage and desorption behavior of pure iron

Yan Yingjie^1,2, Xiang Xingyong^1,2, Zhang Yukun^1,2, Cao Rui^1,2

1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou Gansu 730050, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China

Received:2024-09-22 Revised:2025-01-15 Online:2025-03-25 Published:2025-05-14

摘要/Abstract

摘要： 通过不同退火工艺调控99%纯铁的晶粒尺寸,探究晶粒尺寸对纯铁氢损伤行为的影响。采用电化学充氢法对两种晶粒尺寸的纯铁进行处理,利用扫描电镜观察氢损伤形貌,通过热脱附光谱分析氢脱附行为,并借助X射线衍射研究充氢引起的晶格畸变。结果表明:氢致裂纹主要沿表层晶界萌生,随着裂纹扩展,表层区域被挤出形成氢鼓泡;氢鼓泡尺寸与晶粒尺寸呈正相关,而氢脱附量则随晶粒尺寸增大而降低。X射线衍射分析显示,充氢导致纯铁的衍射峰向小角度偏移,表明晶格发生膨胀,这可能是影响纯铁氢损伤的重要因素。研究结果揭示了晶粒尺寸对纯铁氢损伤行为的影响规律,为改善纯铁的氢脆性能提供了试验依据。

关键词: 纯铁, 晶粒尺寸, 氢损伤, 氢脱附

Abstract: Effect of grain size on hydrogen damage behavior in 99% pure iron was investigated by controlling grain size through different annealing processes. Two types of pure iron with different grain sizes were subjected to electrochemical hydrogen charging. The hydrogen-induced damage was characterized by using scanning electron microscopy, while thermal desorption spectroscopy was employed to analyze hydrogen desorption behavior. The X-ray diffraction was utilized to examine lattice distortion caused by hydrogen charging. The results show that hydrogen-induced cracks primarily initiate at grain boundaries in the surface layer. As the cracks propagate, the surface region is extruded, forming hydrogen blisters. The size of hydrogen blisters show a positive correlation with grain size, whereas the amount of hydrogen desorption decreases with the increase of grain size. The X-ray diffraction analysis reveals that hydrogen charging causes a shift in diffraction peaks towards lower angles, indicating lattice expansion, which may significantly influence hydrogen damage in pure iron. These findings elucidate the effect of grain size on hydrogen damage behavior in pure iron and provide experimental evidence for improving hydrogen embrittlement resistance.

Key words: pure iron, grain size, hydrogen damage, hydrogen desorption

中图分类号:

TG141

闫英杰, 向兴勇, 张钰昆, 曹睿. 晶粒尺寸对纯铁氢损伤及氢脱附行为的影响[J]. 金属热处理, 2025, 50(3): 208-213.

Yan Yingjie, Xiang Xingyong, Zhang Yukun, Cao Rui. Effect of grain size on hydrogen damage and desorption behavior of pure iron[J]. Heat Treatment of Metals, 2025, 50(3): 208-213.

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晶粒尺寸对纯铁氢损伤及氢脱附行为的影响

Effect of grain size on hydrogen damage and desorption behavior of pure iron

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