Thiel, F. ; Geissler, D. ; Nielsch, K. ; Kauffmann, A. ; Seils, S. ; Heilmaier, M. ; Utt, D. ; Albe, K. ; Motylenko, M. ; Rafaja, D. ; Freudenberger, J. (2020)
Origins of strength and plasticity in the precious metal based high-entropy alloy AuCuNiPdPt.
In: Acta Materialia, 185
doi: 10.1016/j.actamat.2019.12.020
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The precious metal based High-Entropy Alloy (HEA) AuCuNiPdPt crystallises in a face-centred cubic structure and is single phase without chemical ordering after homogenisation. However, a decomposition is observed after annealing at intermediate temperatures. This HEA shows extended malleability during cold work up to a logarithmic deformation degree of φ=2.42. The yield strength ranges from 820 MPa in the recrystallised state to 1170 MPa when strain hardened by cold working with a logarithmic deformation degree of φ > 0.6. This work hardening behaviour is traced back to a steep increase in dislocation density as well as in deformation twinning occurring at low strain. The microstructure and the mechanical properties of AuCuNiPdPt are assessed in detail by various methods. EBSD and TEM analyses reveal mechanical twinning as an important deformation mechanism. The high strength in the recrystallised state is evaluated and found to originate predominantly upon solid solution strengthening.
| Typ des Eintrags: | Artikel | ||||
|---|---|---|---|---|---|
| Erschienen: | 2020 | ||||
| Autor(en): | Thiel, F. ; Geissler, D. ; Nielsch, K. ; Kauffmann, A. ; Seils, S. ; Heilmaier, M. ; Utt, D. ; Albe, K. ; Motylenko, M. ; Rafaja, D. ; Freudenberger, J. | ||||
| Art des Eintrags: | Bibliographie | ||||
| Titel: | Origins of strength and plasticity in the precious metal based high-entropy alloy AuCuNiPdPt | ||||
| Sprache: | Englisch | ||||
| Publikationsjahr: | 15 Februar 2020 | ||||
| Verlag: | Elsevier Ltd. | ||||
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia | ||||
| Jahrgang/Volume einer Zeitschrift: | 185 | ||||
| DOI: | 10.1016/j.actamat.2019.12.020 | ||||
| URL / URN: | https://doi.org/10.1016/j.actamat.2019.12.020 | ||||
| Kurzbeschreibung (Abstract): | The precious metal based High-Entropy Alloy (HEA) AuCuNiPdPt crystallises in a face-centred cubic structure and is single phase without chemical ordering after homogenisation. However, a decomposition is observed after annealing at intermediate temperatures. This HEA shows extended malleability during cold work up to a logarithmic deformation degree of φ=2.42. The yield strength ranges from 820 MPa in the recrystallised state to 1170 MPa when strain hardened by cold working with a logarithmic deformation degree of φ > 0.6. This work hardening behaviour is traced back to a steep increase in dislocation density as well as in deformation twinning occurring at low strain. The microstructure and the mechanical properties of AuCuNiPdPt are assessed in detail by various methods. EBSD and TEM analyses reveal mechanical twinning as an important deformation mechanism. The high strength in the recrystallised state is evaluated and found to originate predominantly upon solid solution strengthening. |
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| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung |
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| Hinterlegungsdatum: | 22 Apr 2020 05:26 | ||||
| Letzte Änderung: | 22 Apr 2020 05:26 | ||||
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