Sun, Z. ; Petegem, S. Van ; Cervellino, A. ; Durst, K. ; Blum, W. ; Van Swygenhoven, H. (2015)
Dynamic recovery in nanocrystalline Ni.
In: Acta Materialia, 91
doi: 10.1016/j.actamat.2015.03.033
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The constant flow stress reached during uniaxial deformation of electrodeposited nanocrystalline Ni reflects a quasi-stationary balance between dislocation slip and grain boundary (GB) accommodation mechanisms. Stress reduction tests allow to suppress dislocation slip and bring recovery mechanisms into the foreground. When combined with in situ X-ray diffraction it can be shown that grain boundary recovery mechanisms play an important role in producing plastic strain while hardening the microstructure. This result has a significant consequence for the parameters of thermally activated glide of dislocations, such as athermal stress and activation volume, which are traditionally derived from stress/strain rate change tests. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2015 |
| Autor(en): | Sun, Z. ; Petegem, S. Van ; Cervellino, A. ; Durst, K. ; Blum, W. ; Van Swygenhoven, H. |
| Art des Eintrags: | Bibliographie |
| Titel: | Dynamic recovery in nanocrystalline Ni |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Juni 2015 |
| Verlag: | Pergamon-Elsevier Science Ltd. |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 91 |
| DOI: | 10.1016/j.actamat.2015.03.033 |
| URL / URN: | http://dx.doi.org/10.1016/j.actamat.2015.03.033 |
| Kurzbeschreibung (Abstract): | The constant flow stress reached during uniaxial deformation of electrodeposited nanocrystalline Ni reflects a quasi-stationary balance between dislocation slip and grain boundary (GB) accommodation mechanisms. Stress reduction tests allow to suppress dislocation slip and bring recovery mechanisms into the foreground. When combined with in situ X-ray diffraction it can be shown that grain boundary recovery mechanisms play an important role in producing plastic strain while hardening the microstructure. This result has a significant consequence for the parameters of thermally activated glide of dislocations, such as athermal stress and activation volume, which are traditionally derived from stress/strain rate change tests. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Freie Schlagworte: | Stress reduction, X-ray diffraction, Recovery by GB accommodation, Quasi-stationary state, Constant flow stress |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physikalische Metallkunde |
| Hinterlegungsdatum: | 25 Jan 2016 11:47 |
| Letzte Änderung: | 02 Mär 2022 14:02 |
| PPN: | |
| Sponsoren: | The authors gratefully acknowledge the Swiss National Science Foundation for financial support (200021_137881). |
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