Kosiba, K. ; Sopu, D. ; Scudino, S. ; Zhang, L. ; Bednarcik, J. ; Pauly, S. (2019)
Modulating heterogeneity and plasticity in bulk metallic glasses: Role of interfaces on shear banding.
In: International Journal of Plasticity, 119
doi: 10.1016/j.ijplas.2019.03.007
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Structural heterogeneities in monolithic metallic glasses, i.e. free volume variations or stress/strain fields, are known to be pivotal for their plasticity but the mechanisms how they affect irreversible deformation remain poorly understood. We show that flash-annealing is a capable tool for modifying the free volume content and its distribution, which creates non-affine stress fields in a monolithic CuZr-based bulk metallic glass. Rather than the overall free volume, μm-scale regions of relaxed and rejuvenated glass govern plastic deformation. Complementary molecular dynamics simulations underpin the importance of the interfaces between relaxed and rejuvenated volumes for shear band proliferation. Not only can we reach unmatched states of metastability in metallic glasses with the present approach but also better understand the mechanisms underlying plasticity in monolithic but structurally heterogeneous metallic glasses.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Kosiba, K. ; Sopu, D. ; Scudino, S. ; Zhang, L. ; Bednarcik, J. ; Pauly, S. |
| Art des Eintrags: | Bibliographie |
| Titel: | Modulating heterogeneity and plasticity in bulk metallic glasses: Role of interfaces on shear banding |
| Sprache: | Englisch |
| Publikationsjahr: | 19 März 2019 |
| Verlag: | Elsevier Ltd. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | International Journal of Plasticity |
| Jahrgang/Volume einer Zeitschrift: | 119 |
| DOI: | 10.1016/j.ijplas.2019.03.007 |
| URL / URN: | https://doi.org/10.1016/j.ijplas.2019.03.007 |
| Kurzbeschreibung (Abstract): | Structural heterogeneities in monolithic metallic glasses, i.e. free volume variations or stress/strain fields, are known to be pivotal for their plasticity but the mechanisms how they affect irreversible deformation remain poorly understood. We show that flash-annealing is a capable tool for modifying the free volume content and its distribution, which creates non-affine stress fields in a monolithic CuZr-based bulk metallic glass. Rather than the overall free volume, μm-scale regions of relaxed and rejuvenated glass govern plastic deformation. Complementary molecular dynamics simulations underpin the importance of the interfaces between relaxed and rejuvenated volumes for shear band proliferation. Not only can we reach unmatched states of metastability in metallic glasses with the present approach but also better understand the mechanisms underlying plasticity in monolithic but structurally heterogeneous metallic glasses. |
| Freie Schlagworte: | irreversible deformation, bulk metallic glass, plastic deformation, molecular dynamics |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
| Hinterlegungsdatum: | 28 Jan 2020 07:27 |
| Letzte Änderung: | 13 Jan 2024 13:50 |
| PPN: | |
| Projekte: | SO 1518/1-1 |
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