Kalcher, Constanze ; Adjaoud, Omar ; Albe, Karsten (2020)
Creep Deformation of a Cu-Zr Nanoglass and Interface Reinforced Nanoglass-Composite Studied by Molecular Dynamics Simulations.
In: Frontiers in Materials
doi: 10.3389/fmats.2020.00223
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Using molecular dynamics simulations, we compare the creep properties of a homogeneous Cu64Zr36 metallic glass, a nanoglass with the same nominal composition, and a nanoglass-crystal composite, where the amorphous grain boundary phase has been reinforced with the high-temperature stable Cu2Zr Laves phase. While the nanoglass architecture is successful at preventing shear band formation, which typically results in a brittle failure mode at room temperature and conventional loading conditions, we find that the high fraction of glass-glass grain boundary phase therein is not beneficial to its creep properties. This can be amended by reinforcing the glass-glass interphase with a high-temperature stable crystalline substitute.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Kalcher, Constanze ; Adjaoud, Omar ; Albe, Karsten |
| Art des Eintrags: | Bibliographie |
| Titel: | Creep Deformation of a Cu-Zr Nanoglass and Interface Reinforced Nanoglass-Composite Studied by Molecular Dynamics Simulations |
| Sprache: | Englisch |
| Publikationsjahr: | 28 August 2020 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Frontiers in Materials |
| DOI: | 10.3389/fmats.2020.00223 |
| URL / URN: | https://doi.org/10.3389/fmats.2020.00223 |
| Kurzbeschreibung (Abstract): | Using molecular dynamics simulations, we compare the creep properties of a homogeneous Cu64Zr36 metallic glass, a nanoglass with the same nominal composition, and a nanoglass-crystal composite, where the amorphous grain boundary phase has been reinforced with the high-temperature stable Cu2Zr Laves phase. While the nanoglass architecture is successful at preventing shear band formation, which typically results in a brittle failure mode at room temperature and conventional loading conditions, we find that the high fraction of glass-glass grain boundary phase therein is not beneficial to its creep properties. This can be amended by reinforcing the glass-glass interphase with a high-temperature stable crystalline substitute. |
| Freie Schlagworte: | AL 578/15-2 ; SPP 1594 ; metallic glass, grain interfaces, creep, molecular dynamics, nanoglass |
| 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: | 22 Sep 2020 06:22 |
| Letzte Änderung: | 22 Sep 2020 06:22 |
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