| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nietzke, Jonathan
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Evaluation of the tensile properties of X65 pipeline steel in compressed gaseous hydrogen using hollow specimenscitations
- 2024Trapping and diffusion in high-pressure hydrogen charged CoCrFeMnNi high entropy alloy compared to austenitic steel 316Lcitations
- 2024Influence of strain rate on the effect of hydrogen in pre-charged 316L stainless steel: A comparison of conventional and hollow specimen testing
- 2024Evaluation of the impact of gaseous hydrogen on pipeline steels utilizing hollow specimen technique and μCTcitations
- 2023Investigation of stress relief crack susceptibility of CrMoV steels coarse grain HAZ via simulation of uniaxial stress conditions during PWHTcitations
- 2023Effect of Tensile Loading and Temperature on the Hydrogen Solubility of Steels at High Gas Pressurecitations
- 2023Performance of Conventional and Additive Manufactured Austenitic Stainless Steels under Gaseous Hydrogen Environment using in-situ Hollow Specimen Technique
- 2022Characterization of Hydrogen Diffusion in Offshore Steel S420G2+M Multi-layer Submerged Arc Welded Jointcitations
- 2022Hydrogen effect on mechanical properties and cracking of creep‑resistant 9% Cr P92 steel and P91 weld metalcitations
- 2022Hydrogen diffusion and desorption characteristics of a CoCrFeMnNi high entropy and a CoCrNi medium entropy alloy
- 2020Hydrogen diffusion and local Volta potential in high- and medium-entropy alloyscitations
- 2020Hydrogen diffusion and local Volta potential in high- and medium-entropy alloyscitations
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article
Hydrogen diffusion and local Volta potential in high- and medium-entropy alloys
Abstract
<jats:title>Abstract</jats:title><jats:p>High-entropy alloys (HEAs) are characterized by a solid solution of minimum five and medium-entropy alloys (MEAs) of minimum three principal alloying elements in equiatomic proportions. They show exceptional application properties, such as high-strength and ductility or corrosion resistance. Future HEA/MEA-components could be exposed to hydrogen containing environments like vessels for cryogenic or high-pressure storage where the hydrogen absorption and diffusion in these materials is of interest. In our study, we investigated the HEA Co<jats:sub>20</jats:sub>Cr<jats:sub>20</jats:sub>Fe<jats:sub>20</jats:sub>Mn<jats:sub>20</jats:sub>Ni<jats:sub>20</jats:sub> and the MEA Co<jats:sub>33.3</jats:sub>Cr<jats:sub>33.3</jats:sub>Ni<jats:sub>33.3</jats:sub>. For hydrogen ingress, cathodic charging was applied and diffusion kinetic was measured by high-resolution thermal desorption spectros-copy using different heating rates up to 0.250 K/s. Peak deconvolution resulted in high-temperature desorption peaks and hydrogen trapping above 280 °C. A total hydrogen concentration > 40 ppm was identified for the MEA and > 100 ppm for HEA. This indicates two important effects: (1) delayed hydrogen diffusion and (2) considerable amount of trapped hydrogen that must be anticipated for hydrogen assisted cracking phenomenon. Local electrochemical Volta potential maps had been measured for the hydrogen free condition by means of high-resolution Scanning Kelvin Probe Force Microscopy (SKPFM).</jats:p>