Janda, D. ; Ghassemi-Armaki, H. ; Bruder, E. ; Hockauf, M. ; Heilmaier, M. ; Kumar, K. S. (2016)
Effect of strain-rate on the deformation response of D0 3 -ordered Fe 3 Al.
In: Acta Materialia, 103
doi: 10.1016/j.actamat.2015.11.002
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The mechanical response of centrifugally cast Fe(3)A1 with the composition Fe-27A1 (at.%) containing microalloying additions of Nb, Zr, C, and B was investigated over a wide range of strain rates between 10(-4) and 10(3) s(-1) at room temperature. Tests were carried out in compression using a (i) screw-driven load frame, (ii) drop impact tester, and (iii) split-Hopkinson pressure bar at quasi-static, intermediate and dynamic strain rates respectively. Post deformation analysis was carried out by DSC, SEM/EBSD, TEM and micropillar deformation. In all instances, the stress-strain curves show initial hardening (-first 5% plastic strain) followed by a plateau in stress. A loss in work-hardening occurs at the highest strain rates examined (>10(3) s(-1)) and is likely associated with shear localization; in addition, (2 11) [11 1]-type twinning was observed at these high strain rates at room temperature. This observation is in line with previous theoretical calculations of the antiphase boundary (APB) energy. The consequence of a continuously increasing yield stress with strain rate and a loss in work hardening at the highest strain rates together yields a maximum in flow stress at the intermediate strain rate. (c) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2016 |
| Autor(en): | Janda, D. ; Ghassemi-Armaki, H. ; Bruder, E. ; Hockauf, M. ; Heilmaier, M. ; Kumar, K. S. |
| Art des Eintrags: | Bibliographie |
| Titel: | Effect of strain-rate on the deformation response of D0 3 -ordered Fe 3 Al |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Januar 2016 |
| Verlag: | Pergamon-Elsevier Science Ltd, Oxford, England |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 103 |
| DOI: | 10.1016/j.actamat.2015.11.002 |
| URL / URN: | https://doi.org/10.1016/j.actamat.2015.11.002 |
| Kurzbeschreibung (Abstract): | The mechanical response of centrifugally cast Fe(3)A1 with the composition Fe-27A1 (at.%) containing microalloying additions of Nb, Zr, C, and B was investigated over a wide range of strain rates between 10(-4) and 10(3) s(-1) at room temperature. Tests were carried out in compression using a (i) screw-driven load frame, (ii) drop impact tester, and (iii) split-Hopkinson pressure bar at quasi-static, intermediate and dynamic strain rates respectively. Post deformation analysis was carried out by DSC, SEM/EBSD, TEM and micropillar deformation. In all instances, the stress-strain curves show initial hardening (-first 5% plastic strain) followed by a plateau in stress. A loss in work-hardening occurs at the highest strain rates examined (>10(3) s(-1)) and is likely associated with shear localization; in addition, (2 11) [11 1]-type twinning was observed at these high strain rates at room temperature. This observation is in line with previous theoretical calculations of the antiphase boundary (APB) energy. The consequence of a continuously increasing yield stress with strain rate and a loss in work hardening at the highest strain rates together yields a maximum in flow stress at the intermediate strain rate. (c) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| Freie Schlagworte: | Iron aluminide, Strain rate, Shear localization, Twinning, Work-hardening |
| 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: | 27 Nov 2017 11:21 |
| Letzte Änderung: | 11 Dez 2018 14:47 |
| PPN: | |
| Sponsoren: | Financial support of this work by the Bundesministerium fur Wirtschaft und Technologie (ZIM-project number: KF2593003CK0) is acknowledged., NSF Grant DMR-0520651 |
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