Wu, Wen-Ping ; Şopu, Daniel ; Eckert, Jürgen (2024)
Molecular Dynamics Study of the Nanoindentation Behavior of Cu₆₄Zr₃₆/Cu Amorphous/Crystalline Nanolaminate Composites.
In: Materials, 2021, 14 (11)
doi: 10.26083/tuprints-00019644
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Amorphous/crystalline nanolaminate composites have aroused extensive research interest because of their high strength and good plasticity. In this paper, the nanoindentation behavior of Cu₆₄Zr₃₆/Cu amorphous/crystalline nanolaminates (ACNLs) is investigated by molecular dynamics (MD) simulation while giving special attention to the plastic processes occurring at the interface. The load–displacement curves of ACNLs reveal small fluctuations associated with shear transformation zone (STZ) activation in the amorphous layer, whereas larger fluctuations associated with dislocations emission occur in the crystalline layer. During loading, local STZ activation occurs and the number of STZs increases as the indentation depth in the amorphous layer increases. These STZs are mostly located around the indenter, which correlates to the high stresses concentrated around the indenter. When the indenter penetrates the crystalline layer, dislocations emit from the interface of amorphous/crystalline, and their number increases with increasing indentation depth. During unloading, the overall number of STZs and dislocations decreases, while other new STZs and dislocations become activated. These results are discussed in terms of stress distribution, residual stresses, indentation rate and indenter radius.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Wu, Wen-Ping ; Şopu, Daniel ; Eckert, Jürgen |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Molecular Dynamics Study of the Nanoindentation Behavior of Cu₆₄Zr₃₆/Cu Amorphous/Crystalline Nanolaminate Composites |
| Sprache: | Englisch |
| Publikationsjahr: | 12 Januar 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2021 |
| Ort der Erstveröffentlichung: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials |
| Jahrgang/Volume einer Zeitschrift: | 14 |
| (Heft-)Nummer: | 11 |
| Kollation: | 12 Seiten |
| DOI: | 10.26083/tuprints-00019644 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/19644 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Amorphous/crystalline nanolaminate composites have aroused extensive research interest because of their high strength and good plasticity. In this paper, the nanoindentation behavior of Cu₆₄Zr₃₆/Cu amorphous/crystalline nanolaminates (ACNLs) is investigated by molecular dynamics (MD) simulation while giving special attention to the plastic processes occurring at the interface. The load–displacement curves of ACNLs reveal small fluctuations associated with shear transformation zone (STZ) activation in the amorphous layer, whereas larger fluctuations associated with dislocations emission occur in the crystalline layer. During loading, local STZ activation occurs and the number of STZs increases as the indentation depth in the amorphous layer increases. These STZs are mostly located around the indenter, which correlates to the high stresses concentrated around the indenter. When the indenter penetrates the crystalline layer, dislocations emit from the interface of amorphous/crystalline, and their number increases with increasing indentation depth. During unloading, the overall number of STZs and dislocations decreases, while other new STZs and dislocations become activated. These results are discussed in terms of stress distribution, residual stresses, indentation rate and indenter radius. |
| Freie Schlagworte: | molecular dynamics (MD) simulation, nanoindentation, amorphous/crystalline nanolaminates (ACNLs), shear transformation zone (STZ), dislocation |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-196449 |
| Zusätzliche Informationen: | This article belongs to the Special Issue Advances in Metallic Glass Matrix Composites |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau 600 Technik, Medizin, angewandte Wissenschaften > 660 Technische Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
| Hinterlegungsdatum: | 12 Jan 2024 14:06 |
| Letzte Änderung: | 15 Jan 2024 07:28 |
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Verfügbare Versionen dieses Eintrags
- Molecular Dynamics Study of the Nanoindentation Behavior of Cu₆₄Zr₃₆/Cu Amorphous/Crystalline Nanolaminate Composites. (deposited 12 Jan 2024 14:06) [Gegenwärtig angezeigt]
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