氢微印揭示应变缺陷对奥氏体裂纹尖端附近氢分布的影响

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-09-11 DOI:10.1016/j.corsci.2025.113314

Weijie Wu , Chenwei Xia , Zhicheng Fang , Xuewei Zhang , Xiaowei Wang , Jianming Gong , Jinxu Li

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引用次数: 0

摘要

本研究将氢微打印试验与有限元分析相结合，研究了2101双相不锈钢在原位充氢慢应变速率拉伸加载过程中裂纹尖端富氢的微观来源。结果表明，氢主要集中在奥氏体氢致裂纹的两侧和尖端前方非常狭窄的区域内，与应变诱发马氏体或位错密度没有直接关系。考虑氢降低空位形成能的有限元模型表明，氢通过位错jog阻力促进空位生成，产生了高的局部空位密度，从而捕获了氢，这是观察到的富集的原因。这些发现有助于更深入地了解各种氢脆机制的相互作用和各自的作用。

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Hydrogen microprinting revealing role of strain-induced defects on hydrogen distribution near austenite crack tip

In this study, we combined hydrogen micro‑printing test with finite‑element (FE) analysis to investigate the microscale origins of crack‑tip hydrogen enrichment in 2101 duplex stainless steel during in situ hydrogen-charging slow strain rate tensile loading. Results show that hydrogen concentrates mainly on either side of austenitic hydrogen‑induced cracks and within the very narrow region immediately ahead of the tip, with no direct correlation to strain‑induced martensite or dislocation density. FE models incorporating hydrogen‑lowered vacancy‑formation energy demonstrate that hydrogen‑promoted vacancy generation via dislocation jog drag produces high local vacancy densities that trap hydrogen, accounting for the observed enrichment. These findings can help to gain a deeper understanding of the interactions and respective roles of various hydrogen embrittlement mechanisms.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.