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| Azevedo, Nuno Monteiro |
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Mandel, Marcel
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Publications (5/5 displayed)
- 2024Hydrogen Diffusion in Deformed Austenitic TRIP Steel—A Study of Mathematical Prediction and Experimental Validationcitations
- 2023Hydrogen Embrittlement in a Plasma Tungsten Inert Gas‐Welded Austenitic CrMnNi Stainless Steelcitations
- 2022Effect of N<sub>2</sub>–H<sub>2</sub> Ratio during Conventional Plasma Nitriding of Intermetallic FeAl40 Alloy on Electrochemical Corrosion Parameters in Sulphuric Acidcitations
- 2021On the Influence of Microstructure on the Corrosion Behavior of Fe–Mn–Al–Ni Shape Memory Alloy in 5.0 wt% NaCl Solutioncitations
- 2020On the Influence of Microstructure on the Corrosion Behavior of Fe–Mn–Al–Ni Shape Memory Alloy in 5.0 wt% NaCl Solution
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article
Hydrogen Embrittlement in a Plasma Tungsten Inert Gas‐Welded Austenitic CrMnNi Stainless Steel
Abstract
<jats:sec><jats:label /><jats:p>The study evaluates the effect of electrochemical hydrogen charging on the tensile properties and fracture behavior of the plasma tungsten inert gas weld of the high‐alloy austenitic steel X3CrMnNiMoN17‐8‐4 in comparison to the pure base metal (BM). The weld metal exhibits a higher susceptibility to hydrogen embrittlement than the BM, which is mainly expressed by a loss in ductility. Based on the performed electron backscatter diffraction and X‐ray diffraction examinations, this is attributed to the higher amount of δ‐ferrite and the higher dislocation density in the weld zone. Furthermore, fractographic analyses reveal a change in the manner of fracture mode from ductile to brittle fracture starting from the edge in the hydrogen charged samples. The wider area of brittle fracture in the weld seam in relation to the BM indicates that hydrogen penetrates deeper into the material. Consequently, the diffusivity of hydrogen in the weld seam is determined to be significantly higher than in the BM.</jats:p></jats:sec>