Hydrogen-Mediated Control of Phase Formation and Microstructure Evolution
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2025
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866917070000619520 |
|---|---|
| author | Schweiger, Lukas Spieckermann, Florian Cengeri, Peter Schökel, Alexander Zehetbauer, Michael Schafler, Erhard Kiener, Daniel Eckert, Jürgen |
| author_facet | Schweiger, Lukas Spieckermann, Florian Cengeri, Peter Schökel, Alexander Zehetbauer, Michael Schafler, Erhard Kiener, Daniel Eckert, Jürgen |
| contents | Hydrogen is key in reducing greenhouse gas emissions in materials production. At the same time, it significantly affects mechanical properties, often causing unwanted embrittlement. However, rather than solely addressing these disadvantages, hydrogens inevitable role in sustainable metallurgy should be leveraged to create new and potentially superior materials. Here, we show that using hydrogen in the form of metal hydrides introduces a barrier to mechanical alloying, stabilizing otherwise unattainable microstructures. Severe plastic deformation of a composite of the high entropy alloy (HEA) TiVZrNbHf and Cu leads to amorphization while substituting the HEA by its hydride preserves the two-phase structure. Monte Carlo simulations confirm that the significantly different hydrogen affinities, together with the restricted dislocation motion in the hydride, create a barrier to mechanical alloying. This hydride route enables new microstructural states, even in well-studied material systems. It opens an additional dimension in designing materials with diverging hydrogen affinities, offering tighter control over mechanical alloying. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_07047 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hydrogen-Mediated Control of Phase Formation and Microstructure Evolution Schweiger, Lukas Spieckermann, Florian Cengeri, Peter Schökel, Alexander Zehetbauer, Michael Schafler, Erhard Kiener, Daniel Eckert, Jürgen Materials Science Hydrogen is key in reducing greenhouse gas emissions in materials production. At the same time, it significantly affects mechanical properties, often causing unwanted embrittlement. However, rather than solely addressing these disadvantages, hydrogens inevitable role in sustainable metallurgy should be leveraged to create new and potentially superior materials. Here, we show that using hydrogen in the form of metal hydrides introduces a barrier to mechanical alloying, stabilizing otherwise unattainable microstructures. Severe plastic deformation of a composite of the high entropy alloy (HEA) TiVZrNbHf and Cu leads to amorphization while substituting the HEA by its hydride preserves the two-phase structure. Monte Carlo simulations confirm that the significantly different hydrogen affinities, together with the restricted dislocation motion in the hydride, create a barrier to mechanical alloying. This hydride route enables new microstructural states, even in well-studied material systems. It opens an additional dimension in designing materials with diverging hydrogen affinities, offering tighter control over mechanical alloying. |
| title | Hydrogen-Mediated Control of Phase Formation and Microstructure Evolution |
| topic | Materials Science |
| url | https://arxiv.org/abs/2504.07047 |