Şopu, D. ; Moitzi, F. ; Mousseau, N. ; Eckert, J. (2020)
An atomic-level perspective of shear band formation and interaction in monolithic metallic glasses.
In: Applied Materials Today, 21
doi: 10.1016/j.apmt.2020.100828
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Understanding the relationship between nanoscale structural heterogeneities or elastic fluctuations and strain localization in monolithic metallic glasses remains a long-standing underlying issue. Here, an atomic-level investigation of the correlation between elastic and structural heterogeneities and the mechanisms of shear banding in CuZr metallic glass is conducted using molecular dynamics simulations. The shear band formation and propagation processes and the intersection mechanism of multiple shear bands are evaluated by means of local entropy-based structural identification and von Mises stress calculation. The shear band follows the path of lower order and high entropy while shear deflection and branching occur when approaching regions of low entropy. The local von Mises stress calculation allows predictions on the shear band direction and the propensity for activation and propagation prior to yielding and sheds light on shear band branching and multiplication processes.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Şopu, D. ; Moitzi, F. ; Mousseau, N. ; Eckert, J. |
| Art des Eintrags: | Bibliographie |
| Titel: | An atomic-level perspective of shear band formation and interaction in monolithic metallic glasses |
| Sprache: | Englisch |
| Publikationsjahr: | Dezember 2020 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Materials Today |
| Jahrgang/Volume einer Zeitschrift: | 21 |
| DOI: | 10.1016/j.apmt.2020.100828 |
| Kurzbeschreibung (Abstract): | Understanding the relationship between nanoscale structural heterogeneities or elastic fluctuations and strain localization in monolithic metallic glasses remains a long-standing underlying issue. Here, an atomic-level investigation of the correlation between elastic and structural heterogeneities and the mechanisms of shear banding in CuZr metallic glass is conducted using molecular dynamics simulations. The shear band formation and propagation processes and the intersection mechanism of multiple shear bands are evaluated by means of local entropy-based structural identification and von Mises stress calculation. The shear band follows the path of lower order and high entropy while shear deflection and branching occur when approaching regions of low entropy. The local von Mises stress calculation allows predictions on the shear band direction and the propensity for activation and propagation prior to yielding and sheds light on shear band branching and multiplication processes. |
| Freie Schlagworte: | Metallic glasses, shear bands, molecular dynamics simulations, plasticity, shear transformation zones, heterogeneities |
| Zusätzliche Informationen: | Artikel-ID: 100828 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung Zentrale Einrichtungen Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) > Hochleistungsrechner |
| Hinterlegungsdatum: | 12 Apr 2022 05:23 |
| Letzte Änderung: | 12 Apr 2022 05:25 |
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