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
Artikel, Bibliographie
Kurzbeschreibung (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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Avchaciov, K. A. ; Ritter, Y. ; Djurabekova, F. ; Nordlund, K. ; Albe, K. |
| Art des Eintrags: | Bibliographie |
| Titel: | Controlled softening of Cu64Zr36 metallic glass by ion irradiation |
| Sprache: | Englisch |
| Publikationsjahr: | 10 Mai 2013 |
| Verlag: | AIP Publishing LLC |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Applied Physics Letters |
| Jahrgang/Volume einer Zeitschrift: | 102 |
| (Heft-)Nummer: | 18 |
| DOI: | 10.1063/1.4804630 |
| Kurzbeschreibung (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. |
| Freie Schlagworte: | Ion radiation effects, Amorphous metals, Copper, Plasticity, Atom irradiation effects, Mechanical properties, Molecular dynamics, Short range order, Molecule irradiation effects, Nucleation |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 28 Nov 2013 09:06 |
| Letzte Änderung: | 28 Nov 2013 09:06 |
| PPN: | |
| Sponsoren: | 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. |
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