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Creep Deformation of a Cu-Zr Nanoglass and Interface Reinforced Nanoglass-Composite Studied by Molecular Dynamics Simulations

Kalcher, Constanze ; Adjaoud, Omar ; Albe, Karsten (2021):
Creep Deformation of a Cu-Zr Nanoglass and Interface Reinforced Nanoglass-Composite Studied by Molecular Dynamics Simulations. (Publisher's Version)
In: Frontiers in Materials, 7, Frontiers, ISSN 2296-8016,
DOI: 10.26083/tuprints-00018634,
[Article]

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.

Item Type: Article
Erschienen: 2021
Creators: Kalcher, Constanze ; Adjaoud, Omar ; Albe, Karsten
Origin: Secondary publication via sponsored Golden Open Access
Status: Publisher's Version
Title: Creep Deformation of a Cu-Zr Nanoglass and Interface Reinforced Nanoglass-Composite Studied by Molecular Dynamics Simulations
Language: English
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.

Journal or Publication Title: Frontiers in Materials
Journal volume: 7
Publisher: Frontiers
Collation: 6 Seiten
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
Date Deposited: 22 Jul 2021 07:38
DOI: 10.26083/tuprints-00018634
Official URL: https://tuprints.ulb.tu-darmstadt.de/18634
URN: urn:nbn:de:tuda-tuprints-186346
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