Li, Yun-Li ; Wu, Wen-Ping ; Şopu, Daniel ; Eckert, Jürgen (2023)
Effects of void shape and location on the fracture and plastic deformation of Cu (crystalline) /Cu64Zr36 (amorphous) composites.
In: Journal of Materials Research and Technology, 24
doi: 10.1016/j.jmrt.2023.04.057
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Voids are probably the most widely studied type of manufacturing defects since they are often formed during material processing. In this paper, the fracture and plastic deformation of Cu/Cu64Zr36 crystalline/amorphous composites with different void locations and shapes are investigated by molecular dynamics simulations. The results show that changes of the void location and shape in the composites significantly change the dislocation motion, shear transformation zones (STZs) activation, shear band propagation, and fracture strength of the composites. The largest shear strain is always found around the void, where it is most likely to activate dislocation motion, STZs and shear band formation. A stepwise increase of the shear localization is mainly related to the nucleation and emission of dislocations, while the very rapid increase is caused by shear band formation. Moreover, the variation of dislocation density and activity of shear bands are mainly responsible for the stress fluctuations in the composites. This paper provides important information for understanding and improving the plastic and fracture behaviors of composites by changing the location and shape of void from an atomistic perspective.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Li, Yun-Li ; Wu, Wen-Ping ; Şopu, Daniel ; Eckert, Jürgen |
| Art des Eintrags: | Bibliographie |
| Titel: | Effects of void shape and location on the fracture and plastic deformation of Cu (crystalline) /Cu64Zr36 (amorphous) composites |
| Sprache: | Englisch |
| Publikationsjahr: | 13 April 2023 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Materials Research and Technology |
| Jahrgang/Volume einer Zeitschrift: | 24 |
| DOI: | 10.1016/j.jmrt.2023.04.057 |
| Kurzbeschreibung (Abstract): | Voids are probably the most widely studied type of manufacturing defects since they are often formed during material processing. In this paper, the fracture and plastic deformation of Cu/Cu64Zr36 crystalline/amorphous composites with different void locations and shapes are investigated by molecular dynamics simulations. The results show that changes of the void location and shape in the composites significantly change the dislocation motion, shear transformation zones (STZs) activation, shear band propagation, and fracture strength of the composites. The largest shear strain is always found around the void, where it is most likely to activate dislocation motion, STZs and shear band formation. A stepwise increase of the shear localization is mainly related to the nucleation and emission of dislocations, while the very rapid increase is caused by shear band formation. Moreover, the variation of dislocation density and activity of shear bands are mainly responsible for the stress fluctuations in the composites. This paper provides important information for understanding and improving the plastic and fracture behaviors of composites by changing the location and shape of void from an atomistic perspective. |
| Freie Schlagworte: | molecular dynamics simulation, fracture behavior, plastic deformation, crystalline/amorphous composites, voids |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
| TU-Projekte: | DFG|SO1518/1-1|Atomistische Modelli |
| Hinterlegungsdatum: | 10 Jan 2024 06:52 |
| Letzte Änderung: | 10 Jan 2024 12:37 |
| PPN: | 51457352X |
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| Suche nach Titel in: | TUfind oder in Google |
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