Şopu, Daniel ; Yuan, Xudong ; Moitzi, Franco ; Stoica, Mihai ; Eckert, Jürgen (2024)
Structure-Property Relationships in Shape Memory Metallic Glass Composites.
In: Materials, 2019, 12 (9)
doi: 10.26083/tuprints-00016522
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
Metallic glass composites with shape memory crystals show enhanced plasticity and work-hardening capability. We investigate the influence of various critical structural aspects such as, the density of crystalline precipitates, their distribution and size, and the structural features and intrinsic properties of the phase on the deformation behavior of metallic amorphous Cu₆₄Zr₃₆ composites with B2 CuZr inclusions using molecular dynamics simulations. We find that a low density of small B2 inclusions with spacing smaller than the critical shear band length controls the formation and distribution of plastic zones in the composite and hinders the formation of critical shear bands. When the free path for shearing allows the formation of mature shear bands a high volume fraction of large B2 precipitates is necessary to stabilize the shear flow and avoid runaway instability. Additionally, we also investigate the deformation mechanism of composites with pure copper crystals for comparison, in order to understand the superior mechanical properties of metallic glass composites with shape memory crystals in more detail. The complex and competing mechanisms of deformation occurring in shape memory metallic glass composites allow this class of materials to sustain large tensile deformation, even though only a low-volume fraction of crystalline inclusions is present.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2024 |
| Autor(en): | Şopu, Daniel ; Yuan, Xudong ; Moitzi, Franco ; Stoica, Mihai ; Eckert, Jürgen |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Structure-Property Relationships in Shape Memory Metallic Glass Composites |
| Sprache: | Englisch |
| Publikationsjahr: | 16 Januar 2024 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2019 |
| Ort der Erstveröffentlichung: | Basel |
| Verlag: | MDPI |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials |
| Jahrgang/Volume einer Zeitschrift: | 12 |
| (Heft-)Nummer: | 9 |
| Kollation: | 10 Seiten |
| DOI: | 10.26083/tuprints-00016522 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/16522 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Metallic glass composites with shape memory crystals show enhanced plasticity and work-hardening capability. We investigate the influence of various critical structural aspects such as, the density of crystalline precipitates, their distribution and size, and the structural features and intrinsic properties of the phase on the deformation behavior of metallic amorphous Cu₆₄Zr₃₆ composites with B2 CuZr inclusions using molecular dynamics simulations. We find that a low density of small B2 inclusions with spacing smaller than the critical shear band length controls the formation and distribution of plastic zones in the composite and hinders the formation of critical shear bands. When the free path for shearing allows the formation of mature shear bands a high volume fraction of large B2 precipitates is necessary to stabilize the shear flow and avoid runaway instability. Additionally, we also investigate the deformation mechanism of composites with pure copper crystals for comparison, in order to understand the superior mechanical properties of metallic glass composites with shape memory crystals in more detail. The complex and competing mechanisms of deformation occurring in shape memory metallic glass composites allow this class of materials to sustain large tensile deformation, even though only a low-volume fraction of crystalline inclusions is present. |
| Freie Schlagworte: | metallic glass composites, shape memory alloys, molecular dynamics, plasticity |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-165223 |
| Zusätzliche Informationen: | This article belongs to the Special Issue Computational Design of Complex Structural Alloys |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie 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: | 16 Jan 2024 10:42 |
| Letzte Änderung: | 17 Jan 2024 09:01 |
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| Suche nach Titel in: | TUfind oder in Google |
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