Grain growth and dislocation density evolution in a nanocrystalline Ni-Fe alloy induced by high-pressure torsion

S. Ni; Y. B. Wang; X. Z. Liao; S. N. Alhajeri; H. Q. Li; Y. H. Zhao; E. J. Lavernia; S. P. Ringer; T. G. Langdon; Y. T. Zhu

doi:10.1016/j.scriptamat.2010.10.027

Author(s)

S. Ni
Y. B. Wang
X. Z. Liao
S. N. Alhajeri
H. Q. Li
Y. H. Zhao
E. J. Lavernia
S. P. Ringer
T. G. Langdon

Detail(s)

Original language	English
Pages (from-to)	327-330
Journal / Publication	Scripta Materialia
Volume	64
Issue number	4
Online published	26 Oct 2010
Publication status	Published - Feb 2011
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.scriptamat.2010.10.027 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-78649631094&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(0ecee1f1-fe27-4f33-a79f-fc8653ec26c2).html

Abstract

The structural evolution of a nanocrystalline Ni-Fe alloy induced by high-pressure torsion (HPT) was investigated. HPT-induced grain growth occurred via grain rotation and coalescence, forming three-dimensional small-angle sub-grain boundaries. Further deformation eliminates the sub-grain boundaries from which dislocations glide away on different {1 1 1} planes. A significant number of these dislocations come together to form Lomer-Cottrell locks that effectively increase the dislocation storage capacity of the nanocrystalline material. These observations may help with developing strong and ductile nanocrystalline materials. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Research Area(s)

Dislocation density, High-pressure torsion, Nanocrystalline materials, Severe plastic deformation

Citation Format(s)

[ RIS ] [ BibTeX ]

Grain growth and dislocation density evolution in a nanocrystalline Ni-Fe alloy induced by high-pressure torsion. / Ni, S.; Wang, Y. B.; Liao, X. Z. et al.
In: Scripta Materialia, Vol. 64, No. 4, 02.2011, p. 327-330.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Ni, S, Wang, YB, Liao, XZ, Alhajeri, SN, Li, HQ, Zhao, YH, Lavernia, EJ, Ringer, SP, Langdon, TG & Zhu, YT 2011, 'Grain growth and dislocation density evolution in a nanocrystalline Ni-Fe alloy induced by high-pressure torsion', Scripta Materialia, vol. 64, no. 4, pp. 327-330. https://doi.org/10.1016/j.scriptamat.2010.10.027

Ni, S., Wang, Y. B., Liao, X. Z., Alhajeri, S. N., Li, H. Q., Zhao, Y. H., Lavernia, E. J., Ringer, S. P., Langdon, T. G., & Zhu, Y. T. (2011). Grain growth and dislocation density evolution in a nanocrystalline Ni-Fe alloy induced by high-pressure torsion. Scripta Materialia, 64(4), 327-330. https://doi.org/10.1016/j.scriptamat.2010.10.027

Ni S, Wang YB, Liao XZ, Alhajeri SN, Li HQ, Zhao YH et al. Grain growth and dislocation density evolution in a nanocrystalline Ni-Fe alloy induced by high-pressure torsion. Scripta Materialia. 2011 Feb;64(4):327-330. Epub 2010 Oct 26. doi: 10.1016/j.scriptamat.2010.10.027

Ni, S. ; Wang, Y. B. ; Liao, X. Z. et al. / Grain growth and dislocation density evolution in a nanocrystalline Ni-Fe alloy induced by high-pressure torsion. In: Scripta Materialia. 2011 ; Vol. 64, No. 4. pp. 327-330.