Hydrogen Trapping at Fe/Cu Interfaces
Philipp Hammer, Matthias Militzer, Vsevolod I Razumovskiy, Salvatore Scirè · 2024
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Description
Hydrogen sneaks into high-strength steel and makes it crack, and Philipp Hammer and co-authors ask whether copper specks inside the steel can act as traps, in a 2024 study. Copper matters twice over: it is a leftover in recycled steel and a deliberate hardening addition that forms tiny precipitates.
As those precipitates mature, their crystal structure marches from body-centered cubic through an intermediate 9R form to face-centered cubic, and the iron-copper boundary changes with it. Atom-level calculations show hydrogen binding at the boundary strengthens along that march, though it stays modest, about like the trapping at dislocations. Follow-up sums then show the mature cubic precipitates could still lower the risk of one embrittlement mechanism, hydrogen-fed local plasticity. The authors weigh which precipitate stage a steelmaker should aim for.
Catalog record
| CREATOR | Philipp Hammer, Matthias Militzer, Vsevolod I Razumovskiy, Salvatore Scirè |
|---|---|
| YEAR | 2024 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 45 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |