Ritter, Yvonne and Sopu, Daniel and Gleiter, Herbert and Albe, Karsten (2011):
Structure, stability and mechanical properties of internal interfaces in Cu64Zr36 nanoglasses studied by MD simulations.
In: Acta Materialia, 59 (17), pp. 6588-6593. Elsevier Science Publishing Company, [Article]
Abstract
Internal interfaces in a Cu64Zr36 glass were generated by joining two planar surfaces and studied with respect to their structure and stability by means of molecular dynamics simulations. In analogy to grain boundaries in crystalline materials, glass–glass interfaces are characterized by a defective short-range order and an excess free volume of about 1–2%. They are stable even close to Tg and exhibit similarities to shear bands that occur in deformed metallic glasses. When deformed in uniaxial tension, pre-existing interfaces promote shear band formation and yielding occurs at lower stress than in the homogeneous bulk glass sample. The results confirm the concept of internal interfaces in nanoglasses.
| Item Type: | Article |
|---|---|
| Erschienen: | 2011 |
| Creators: | Ritter, Yvonne and Sopu, Daniel and Gleiter, Herbert and Albe, Karsten |
| Title: | Structure, stability and mechanical properties of internal interfaces in Cu64Zr36 nanoglasses studied by MD simulations |
| Language: | English |
| Abstract: | Internal interfaces in a Cu64Zr36 glass were generated by joining two planar surfaces and studied with respect to their structure and stability by means of molecular dynamics simulations. In analogy to grain boundaries in crystalline materials, glass–glass interfaces are characterized by a defective short-range order and an excess free volume of about 1–2%. They are stable even close to Tg and exhibit similarities to shear bands that occur in deformed metallic glasses. When deformed in uniaxial tension, pre-existing interfaces promote shear band formation and yielding occurs at lower stress than in the homogeneous bulk glass sample. The results confirm the concept of internal interfaces in nanoglasses. |
| Journal or Publication Title: | Acta Materialia |
| Journal volume: | 59 |
| Number: | 17 |
| Publisher: | Elsevier Science Publishing Company |
| Uncontrolled Keywords: | Metallic glasses, Interfaces, Shear bands, Molecular dynamics |
| 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 Feb 2012 11:00 |
| Official URL: | http://www.sciencedirect.com/science/article/pii/S1359645411... |
| Identification Number: | doi:10.1016/j.actamat.2011.07.013 |
| Corresponding Links: | |
| Funders: | The authors acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG) through project Grants No. Al-578-6 and Al-578/13-1., Computing time was made available by HHLR Frankfurt and Darmstadt, as well as by CSC Julich. |
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