Scheerbaum, Nils ; Kraus, R. ; Liu, J. ; Skrotzki, W. ; Schultz, L. ; Gutfleisch, O. (2012)
Reproducibility of martensitic transformation and phase constitution in Ni-Co-Al.
In: Intermetallics, 20 (1)
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Ni-Co-Al is a potential thermal and magnetic shape-memory alloy due to its high martensitic transformation (MT) temperature and good ductility. The mechanical and thermal pre-treatment of samples are shown to be crucial for a reproducible adjustment of MT. Crushing, which involves plastic deformation, suppresses MT fully. Annealing can partly restore MT, however generally, MT temperatures, crystal structure and phase constitution of the initial bulk material cannot fully be restored. MT temperatures are constant and reproducible, when keeping sample temperature below 150 degrees C, short time annealing at 300 degrees C changes MT temperatures drastically (10-40 K). A guideline is given to obtain reproducibly the desired MT and phase constitution in Ni-Co-Al. The MT temperature and phase constitution are investigated for several different alloy compositions (Ni(35.2)Co(37.8)Al(27.0); Ni(32.5+x)Co(39.5-x) Al(28.0); Ni(33.5+x)Co(39.5-x)Al(27.0); x = 0, 0.5, 1, 1.5, 2; at.%) and sample treatments. High MT temperatures around 100 C can be obtained.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Scheerbaum, Nils ; Kraus, R. ; Liu, J. ; Skrotzki, W. ; Schultz, L. ; Gutfleisch, O. |
| Art des Eintrags: | Bibliographie |
| Titel: | Reproducibility of martensitic transformation and phase constitution in Ni-Co-Al |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2012 |
| Verlag: | Elsevier Science Publishing Company |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Intermetallics |
| Jahrgang/Volume einer Zeitschrift: | 20 |
| (Heft-)Nummer: | 1 |
| Kurzbeschreibung (Abstract): | Ni-Co-Al is a potential thermal and magnetic shape-memory alloy due to its high martensitic transformation (MT) temperature and good ductility. The mechanical and thermal pre-treatment of samples are shown to be crucial for a reproducible adjustment of MT. Crushing, which involves plastic deformation, suppresses MT fully. Annealing can partly restore MT, however generally, MT temperatures, crystal structure and phase constitution of the initial bulk material cannot fully be restored. MT temperatures are constant and reproducible, when keeping sample temperature below 150 degrees C, short time annealing at 300 degrees C changes MT temperatures drastically (10-40 K). A guideline is given to obtain reproducibly the desired MT and phase constitution in Ni-Co-Al. The MT temperature and phase constitution are investigated for several different alloy compositions (Ni(35.2)Co(37.8)Al(27.0); Ni(32.5+x)Co(39.5-x) Al(28.0); Ni(33.5+x)Co(39.5-x)Al(27.0); x = 0, 0.5, 1, 1.5, 2; at.%) and sample treatments. High MT temperatures around 100 C can be obtained. |
| Freie Schlagworte: | martensitic transformations, precipitates, shape-memory effects (including superelasticity), thermomechanical treatment, microstructure |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 26 Mai 2014 11:49 |
| Letzte Änderung: | 26 Mai 2014 11:49 |
| PPN: | |
| Sponsoren: | Plansee SE (Reutte, Austria) , Deutsche Forschungsgemeinschaft SPP1239 |
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