Journal of Materials Research and Technology· 2026Q1
Laser-engineered oxide barriers for hydrogen ingress and embrittlement mitigation: Application to a Cr-Mo high-strength carbon steel
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- Q1SCImago
- 2026year
Short summary
Laser oxidation at 600°C created a 100nm Fe3O4/Fe2O3 layer on Cr-Mo steel, reducing hydrogen uptake by ~30% (electrochemical) to 95% (gaseous) and increasing resistance to hydrogen embrittlement by 25%.
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Key points
- Laser oxidation at 600°C produced a ~100nm mixed Fe3O4/Fe2O3 oxide layer on Cr-Mo steel.
- The oxide layer reduced hydrogen uptake by ~30% (electrochemical) and up to 95% (gaseous).
- Hydrogen diffusion was inhibited, as confirmed by permeation measurements.
- Hydrogen embrittlement susceptibility index increased by 25%.
AI-generated from the title and abstract; the full text is not read.
Abstract
In this work laser oxidation of the tempered martensitic steel was performed and the effect of the formed oxide layer on hydrogen embrittlement (HE) susceptibility was investigated. Influence of the laser process temperature on the morphology and the protectiveness of the oxide layer was scrutinized in the range 450-800 °C utilizing Slow Strain Rate Tensile (SSRT) tests combined with electrochemical hydrogen charging. In addition, pre-treatment of the steel with an organic additive was employed to enhance the functional performance of the oxide layer through modification of oxidation kinetics. The optimal oxidation conditions were obtained at 600 °C, resulting in a mixed oxide layer structure consisting of Fe 3 O 4 and Fe 2 O 3 phase with a thickness in the range of 100 nm. Oxide layers formed on the steel surface exhibited effective hydrogen barrier properties, reducing hydrogen uptake by approximately 30% under electrochemical charging conditions and by up to 95% in a gaseous hydrogen atmosphere as quantified by Thermal Desorption Spectroscopy (TDS). Hydrogen diffusion inhibition was further confirmed by electrochemical permeation measurements, showing a reduced effective diffusion coefficient. HE susceptibility index derived from the tensile tests indicated 25% higher resistance to hydrogen-induced damage.
The authors' abstract, as published at the source. Journal of Materials Research and Technology, 2026 · DOI ↗
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Metals and AlloysMaterials Science