Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steels
Abstract The effect of TiC and VC nano-precipitate size on the hydrogen embrittlement of ferritic steels was studied in this work. Steels containing two size distributions (10 nm or less and 10 - 100 nm) of TiC and VC carbides are subjected to tensile tests in-situ in an electrochemical hydrogen cha...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | npj Materials Degradation |
| Online Access: | https://doi.org/10.1038/s41529-024-00546-7 |
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| author | Tim Boot Pascal Kömmelt Hans J. C. Brouwer Amarante Böttger Vera Popovich |
| author_facet | Tim Boot Pascal Kömmelt Hans J. C. Brouwer Amarante Böttger Vera Popovich |
| author_sort | Tim Boot |
| collection | DOAJ |
| description | Abstract The effect of TiC and VC nano-precipitate size on the hydrogen embrittlement of ferritic steels was studied in this work. Steels containing two size distributions (10 nm or less and 10 - 100 nm) of TiC and VC carbides are subjected to tensile tests in-situ in an electrochemical hydrogen charging environment. Hydrogen is found to be trapped in interstitial matrix sites on the precipitate/matrix interface with activation energies of 14 - 20 kJ/mol and inside misfit dislocation cores with energies of 27 - 37 kJ/mol. All steels are embrittled by 15 to 20%, except the TiC steel with semi-coherent carbides up to 100 nm, which is embrittled by 37%. This is caused by accelerated intergranular fracture as a result of hydrogen trapped in dislocation pile-ups around grain boundary precipitates. The steel with coherent VC nano-carbides retained the highest strength and ductility during in-situ testing. This is therefore the optimal carbide configuration for use in hydrogen environments. |
| format | Article |
| id | doaj-art-1b069f1e51124b45ae9a19465f1eea45 |
| institution | Kabale University |
| issn | 2397-2106 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Materials Degradation |
| spelling | doaj-art-1b069f1e51124b45ae9a19465f1eea452025-01-05T12:42:14ZengNature Portfolionpj Materials Degradation2397-21062025-01-019111110.1038/s41529-024-00546-7Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steelsTim Boot0Pascal Kömmelt1Hans J. C. Brouwer2Amarante Böttger3Vera Popovich4Department of Materials Science & Engineering, Delft University of Technology (TU Delft)Research & DevelopmentDepartment of Materials Science & Engineering, Delft University of Technology (TU Delft)Department of Materials Science & Engineering, Delft University of Technology (TU Delft)Department of Materials Science & Engineering, Delft University of Technology (TU Delft)Abstract The effect of TiC and VC nano-precipitate size on the hydrogen embrittlement of ferritic steels was studied in this work. Steels containing two size distributions (10 nm or less and 10 - 100 nm) of TiC and VC carbides are subjected to tensile tests in-situ in an electrochemical hydrogen charging environment. Hydrogen is found to be trapped in interstitial matrix sites on the precipitate/matrix interface with activation energies of 14 - 20 kJ/mol and inside misfit dislocation cores with energies of 27 - 37 kJ/mol. All steels are embrittled by 15 to 20%, except the TiC steel with semi-coherent carbides up to 100 nm, which is embrittled by 37%. This is caused by accelerated intergranular fracture as a result of hydrogen trapped in dislocation pile-ups around grain boundary precipitates. The steel with coherent VC nano-carbides retained the highest strength and ductility during in-situ testing. This is therefore the optimal carbide configuration for use in hydrogen environments.https://doi.org/10.1038/s41529-024-00546-7 |
| spellingShingle | Tim Boot Pascal Kömmelt Hans J. C. Brouwer Amarante Böttger Vera Popovich Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steels npj Materials Degradation |
| title | Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steels |
| title_full | Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steels |
| title_fullStr | Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steels |
| title_full_unstemmed | Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steels |
| title_short | Effect of titanium and vanadium nano-carbide size on hydrogen embrittlement of ferritic steels |
| title_sort | effect of titanium and vanadium nano carbide size on hydrogen embrittlement of ferritic steels |
| url | https://doi.org/10.1038/s41529-024-00546-7 |
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