High-Temperature Deformation Behavior of Co-Free Non-Equiatomic CrMnFeNi Alloy
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2026
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866911350671802368 |
|---|---|
| author | Dominguez-Gutierrez, F. J. Frelek-Kozak, M. Markovic, G. Strozyk, M. A. Daramola, A. Traversier, M. Fraczkiewicz, A. Zaborowska, A. Khvan, T. Jozwik, I. Kurpaska, L. |
| author_facet | Dominguez-Gutierrez, F. J. Frelek-Kozak, M. Markovic, G. Strozyk, M. A. Daramola, A. Traversier, M. Fraczkiewicz, A. Zaborowska, A. Khvan, T. Jozwik, I. Kurpaska, L. |
| contents | Cobalt-free high-entropy alloys (HEAs) have garnered interest for nuclear structural applications due to their good mechanical performance, thermal stability, and resistance to radiation-induced degradation, while avoiding long-lived Co radioisotopes. This study presents an experimental and computational investigation of the plastic deformation behavior of a non-equatomic CrMnFeNi alloy, designed to maintain a stability of fcc phase in a large domain of temperatures and to balance stacking fault (SF) energies for enhanced strain hardening and ductility. Tensile tests reveal a temperature-dependent reduction in mechanical strength, attributed to thermally activated deformation mechanisms and microstructural evolution. Molecular dynamics simulations of single- and polycrystals capture dislocation activity, SF formation, and twin nucleation as a function of strain and temperature. Electron backscatter diffraction (EBSD) confirms twin formation and grain boundary activity. The Schmid factor mapping is drawn to interpret local slip activity and anisotropic deformation behavior. The absence of Co leads to enhanced high-temperature strength compared to the Cantor alloy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_00619 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-Temperature Deformation Behavior of Co-Free Non-Equiatomic CrMnFeNi Alloy Dominguez-Gutierrez, F. J. Frelek-Kozak, M. Markovic, G. Strozyk, M. A. Daramola, A. Traversier, M. Fraczkiewicz, A. Zaborowska, A. Khvan, T. Jozwik, I. Kurpaska, L. Materials Science Computational Physics Cobalt-free high-entropy alloys (HEAs) have garnered interest for nuclear structural applications due to their good mechanical performance, thermal stability, and resistance to radiation-induced degradation, while avoiding long-lived Co radioisotopes. This study presents an experimental and computational investigation of the plastic deformation behavior of a non-equatomic CrMnFeNi alloy, designed to maintain a stability of fcc phase in a large domain of temperatures and to balance stacking fault (SF) energies for enhanced strain hardening and ductility. Tensile tests reveal a temperature-dependent reduction in mechanical strength, attributed to thermally activated deformation mechanisms and microstructural evolution. Molecular dynamics simulations of single- and polycrystals capture dislocation activity, SF formation, and twin nucleation as a function of strain and temperature. Electron backscatter diffraction (EBSD) confirms twin formation and grain boundary activity. The Schmid factor mapping is drawn to interpret local slip activity and anisotropic deformation behavior. The absence of Co leads to enhanced high-temperature strength compared to the Cantor alloy. |
| title | High-Temperature Deformation Behavior of Co-Free Non-Equiatomic CrMnFeNi Alloy |
| topic | Materials Science Computational Physics |
| url | https://arxiv.org/abs/2601.00619 |