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), pp. 054005-(1. ISSN 2331-7019,
[Article]
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.
| Item Type: | Article |
|---|---|
| Erschienen: | 2016 |
| Creators: | Brink, Tobias ; Peterlechner, Martin ; Rösner, Harald ; Albe, Karsten ; Wilde, Gerhard |
| Title: | Influence of Crystalline Nanoprecipitates on Shear-Band Propagation in Cu-Zr-Based Metallic Glasses |
| Language: | English |
| 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. |
| Journal or Publication Title: | Physical Review Applied |
| Volume of the journal: | 5 |
| Issue Number: | 5 |
| 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 Zentrale Einrichtungen > University IT-Service and Computing Centre (HRZ) > Hochleistungsrechner Zentrale Einrichtungen > University IT-Service and Computing Centre (HRZ) Zentrale Einrichtungen |
| Date Deposited: | 13 May 2016 11:20 |
| URL / URN: | http://dx.doi.org/10.1103/PhysRevApplied.5.054005 |
| Identification Number: | doi:10.1103/PhysRevApplied.5.054005 |
| PPN: | |
| Funders: | 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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