Brink, Tobias ; Peterlechner, Martin ; Rösner, Harald ; Albe, Karsten ; Wilde, Gerhard (2016)
Influence of Crystalline Nanoprecipitates on Shear-Band Propagation in Cu-Zr-Based Metallic Glasses.
In: Physical Review Applied, 5 (5)
doi: 10.1103/PhysRevApplied.5.054005
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The interaction of shear bands with crystalline nanoprecipitates in Cu-Zr-based metallic glasses is investigated by a combination of high-resolution TEM imaging and molecular-dynamics computer simulations. Our results reveal different interaction mechanisms: Shear bands can dissolve precipitates, can wrap around crystalline obstacles, or can be blocked depending on the size and density of the precipitates. If the crystalline phase has a low yield strength, we also observe slip transfer through the precipitate. Based on the computational results and experimental findings, a qualitative mechanism map is proposed that categorizes the various processes as a function of the critical stress for dislocation nucleation, precipitate size, and distance.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Brink, Tobias ; Peterlechner, Martin ; Rösner, Harald ; Albe, Karsten ; Wilde, Gerhard |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of Crystalline Nanoprecipitates on Shear-Band Propagation in Cu-Zr-Based Metallic Glasses |
| Sprache: | Englisch |
| Publikationsjahr: | 6 Mai 2016 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review Applied |
| Jahrgang/Volume einer Zeitschrift: | 5 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1103/PhysRevApplied.5.054005 |
| Kurzbeschreibung (Abstract): | The interaction of shear bands with crystalline nanoprecipitates in Cu-Zr-based metallic glasses is investigated by a combination of high-resolution TEM imaging and molecular-dynamics computer simulations. Our results reveal different interaction mechanisms: Shear bands can dissolve precipitates, can wrap around crystalline obstacles, or can be blocked depending on the size and density of the precipitates. If the crystalline phase has a low yield strength, we also observe slip transfer through the precipitate. Based on the computational results and experimental findings, a qualitative mechanism map is proposed that categorizes the various processes as a function of the critical stress for dislocation nucleation, precipitate size, and distance. |
| 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 > Hochschulrechenzentrum (HRZ) > Hochleistungsrechner Zentrale Einrichtungen > Hochschulrechenzentrum (HRZ) Zentrale Einrichtungen |
| Hinterlegungsdatum: | 13 Mai 2016 11:20 |
| Letzte Änderung: | 26 Jul 2016 10:42 |
| PPN: | |
| Sponsoren: | Financial support by the Deutsche Forschungsgemeinschaft (DFG) through project Grants No. AL 578/13-1, No. AL 578/6-2, and No. WI 1899/12-1 is gratefully acknowledged. |
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