Avchaciov, K. A. ; Ritter, Y. ; Djurabekova, F. ; Nordlund, K. ; Albe, K. (2013)
Controlled softening of Cu64Zr36 metallic glass by ion irradiation.
In: Applied Physics Letters, 102 (18)
doi: 10.1063/1.4804630
Article, Bibliographie
Abstract
We study the effect of irradiation with 5–20 keV recoils on the topological and chemical short-range order of Cu 64Zr36 metallic glass using molecular dynamics simulations. We show that within the cascade region, the structural backbone of stiff Cu-centered icosahedral units is destroyed, leading to locally softened areas. Under mechanical load, the formation of shear transformation zones is thus promoted in the damaged area. Our results suggest that irradiation is a means to introduce nucleation sites for multiple shear bands and thus prevents catastrophic failure due to the presence of a single critical shear band.
| Item Type: | Article |
|---|---|
| Erschienen: | 2013 |
| Creators: | Avchaciov, K. A. ; Ritter, Y. ; Djurabekova, F. ; Nordlund, K. ; Albe, K. |
| Type of entry: | Bibliographie |
| Title: | Controlled softening of Cu64Zr36 metallic glass by ion irradiation |
| Language: | English |
| Date: | 10 May 2013 |
| Publisher: | AIP Publishing LLC |
| Journal or Publication Title: | Applied Physics Letters |
| Volume of the journal: | 102 |
| Issue Number: | 18 |
| DOI: | 10.1063/1.4804630 |
| Abstract: | We study the effect of irradiation with 5–20 keV recoils on the topological and chemical short-range order of Cu 64Zr36 metallic glass using molecular dynamics simulations. We show that within the cascade region, the structural backbone of stiff Cu-centered icosahedral units is destroyed, leading to locally softened areas. Under mechanical load, the formation of shear transformation zones is thus promoted in the damaged area. Our results suggest that irradiation is a means to introduce nucleation sites for multiple shear bands and thus prevents catastrophic failure due to the presence of a single critical shear band. |
| Uncontrolled Keywords: | Ion radiation effects, Amorphous metals, Copper, Plasticity, Atom irradiation effects, Mechanical properties, Molecular dynamics, Short range order, Molecule irradiation effects, Nucleation |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Materials Modelling 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences |
| Date Deposited: | 28 Nov 2013 09:06 |
| Last Modified: | 28 Nov 2013 09:06 |
| PPN: | |
| Funders: | We acknowledge financial support from the National Graduate School in Materials Physics in Finland, the Academy of Finland, the DFG through Project No. AL-578/13 and a DAAD-PPP travel grant. |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Send an inquiry |
Options (only for editors)
 |
Show editorial Details |
Drucken
Impressum