Sopu, D. ; Scudino, S. ; Bian, X. L. ; Gammer, C. ; Eckert, J. (2019)
Atomic-scale origin of shear band multiplication in heterogeneous metallic glasses.
In: Scripta Materialia, 178
doi: 10.1016/j.scriptamat.2019.11.006
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Using molecular dynamics simulations, we provide an atomistic description of the shear band multiplication mechanisms in a heterogeneous metallic glass consisting of two distinct amorphous regions with different amounts of free volume and degrees of short-range order. The structural differences and elastic fluctuations encountered by the developing shear band while crossing the interface between the two regions alter the autocatalytic activation of the shear transformation zones (STZs) and, subsequently, lead to shear band branching. The two-unit STZ-vortex mechanism sheds light on the correlation between the strain distribution during tensile deformation and the directional characteristics of the STZ activation process.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Sopu, D. ; Scudino, S. ; Bian, X. L. ; Gammer, C. ; Eckert, J. |
| Art des Eintrags: | Bibliographie |
| Titel: | Atomic-scale origin of shear band multiplication in heterogeneous metallic glasses |
| Sprache: | Englisch |
| Publikationsjahr: | 12 November 2019 |
| Verlag: | Elsevier Ltd. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Scripta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 178 |
| DOI: | 10.1016/j.scriptamat.2019.11.006 |
| URL / URN: | https://doi.org/10.1016/j.scriptamat.2019.11.006 |
| Kurzbeschreibung (Abstract): | Using molecular dynamics simulations, we provide an atomistic description of the shear band multiplication mechanisms in a heterogeneous metallic glass consisting of two distinct amorphous regions with different amounts of free volume and degrees of short-range order. The structural differences and elastic fluctuations encountered by the developing shear band while crossing the interface between the two regions alter the autocatalytic activation of the shear transformation zones (STZs) and, subsequently, lead to shear band branching. The two-unit STZ-vortex mechanism sheds light on the correlation between the strain distribution during tensile deformation and the directional characteristics of the STZ activation process. |
| 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 07:29 |
| Letzte Änderung: | 13 Jan 2024 13:55 |
| PPN: | |
| Projekte: | SO 1518/1-1 (DFG) |
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