Padmanabhan, K. A. ; Sripathi, Sriharsha ; Hahn, H. ; Gleiter, H. (2014)
Inverse Hall–Petch effect in quasi- and nanocrystalline materials.
In: Materials Letters, 133
doi: 10.1016/j.matlet.2014.06.153
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Inverse Hall-Petch effect/grain size softening in quasi- and nanocrystalline materials at ambient/low temperatures is attributed to mesoscopic (similar to a grain diameter or more) grain/interphase boundary sliding controlled flow. Equations for estimating the free energy of activation for the rate controlling process, the free volume fraction present in a basic sliding unit and the average number of grain boundaries that align to form a planar interface during superplastic deformation are given in some of our earlier papers. These predictions are verified here using experimental data pertaining to one quasi- and two nanocrystalline systems. The agreement between the predictions and the experimental observations is satisfactory. (C) 2014 Elsevier B.V. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2014 |
| Autor(en): | Padmanabhan, K. A. ; Sripathi, Sriharsha ; Hahn, H. ; Gleiter, H. |
| Art des Eintrags: | Bibliographie |
| Titel: | Inverse Hall–Petch effect in quasi- and nanocrystalline materials |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Oktober 2014 |
| Verlag: | ELSEVIER SCIENCE BV, Netherlands |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials Letters |
| Jahrgang/Volume einer Zeitschrift: | 133 |
| DOI: | 10.1016/j.matlet.2014.06.153 |
| Kurzbeschreibung (Abstract): | Inverse Hall-Petch effect/grain size softening in quasi- and nanocrystalline materials at ambient/low temperatures is attributed to mesoscopic (similar to a grain diameter or more) grain/interphase boundary sliding controlled flow. Equations for estimating the free energy of activation for the rate controlling process, the free volume fraction present in a basic sliding unit and the average number of grain boundaries that align to form a planar interface during superplastic deformation are given in some of our earlier papers. These predictions are verified here using experimental data pertaining to one quasi- and two nanocrystalline systems. The agreement between the predictions and the experimental observations is satisfactory. (C) 2014 Elsevier B.V. All rights reserved. |
| Freie Schlagworte: | Grain size softening/inverse Hall-Petch effect, Grain boundary sliding, Rate controlling process, Quasi-crystals, Nanocrystalline materials |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 10 Feb 2016 09:50 |
| Letzte Änderung: | 10 Feb 2016 09:50 |
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