Strain softening in nanocrystalline Ni-Fe alloy induced by large HPT revolutions

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

doi:10.1016/j.msea.2011.03.007

Author(s)

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

Detail(s)

Original language	English
Pages (from-to)	4807-4811
Journal / Publication	Materials Science and Engineering A
Volume	528
Issue number	13-14
Online published	8 Mar 2011
Publication status	Published - 25 May 2011
Externally published	Yes

Link(s)

DOI	DOI https://doi.org/10.1016/j.msea.2011.03.007 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-79953291775&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(48b17f60-6caa-4a07-85c4-c443386ab6d4).html

Abstract

The influence of strain on the hardness of an electrochemically deposited nanocrystalline Ni-20. wt.% Fe alloy processed by high-pressure torsion (HPT) for 20 and 30 revolutions was investigated. Strain softening followed by a stable hardness value was observed. Structural investigations revealed that, while dislocation density was important, continuous grain growth played a major role in the strain softening. The stable hardness indicates that an equilibrium structure was achieved, supporting a dynamic balance between deformation-induced grain growth and grain refinement and between deformation-induced dislocation generation and dislocation annihilation. © 2011 Elsevier B.V.

Research Area(s)

Dislocation density, Lomer-Cottrell locks, Nanocrystalline materials, Severe plastic deformation, Strain softening

Citation Format(s)

[ RIS ] [ BibTeX ]

Strain softening in nanocrystalline Ni-Fe alloy induced by large HPT revolutions. / Ni, S.; Wang, Y. B.; Liao, X. Z. et al.
In: Materials Science and Engineering A, Vol. 528, No. 13-14, 25.05.2011, p. 4807-4811.

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

Ni, S, Wang, YB, Liao, XZ, Figueiredo, RB, Li, HQ, Zhao, YH, Lavernia, EJ, Ringer, SP, Langdon, TG & Zhu, YT 2011, 'Strain softening in nanocrystalline Ni-Fe alloy induced by large HPT revolutions', Materials Science and Engineering A, vol. 528, no. 13-14, pp. 4807-4811. https://doi.org/10.1016/j.msea.2011.03.007

Ni, S., Wang, Y. B., Liao, X. Z., Figueiredo, R. B., Li, H. Q., Zhao, Y. H., Lavernia, E. J., Ringer, S. P., Langdon, T. G., & Zhu, Y. T. (2011). Strain softening in nanocrystalline Ni-Fe alloy induced by large HPT revolutions. Materials Science and Engineering A, 528(13-14), 4807-4811. https://doi.org/10.1016/j.msea.2011.03.007

Ni S, Wang YB, Liao XZ, Figueiredo RB, Li HQ, Zhao YH et al. Strain softening in nanocrystalline Ni-Fe alloy induced by large HPT revolutions. Materials Science and Engineering A. 2011 May 25;528(13-14):4807-4811. Epub 2011 Mar 8. doi: 10.1016/j.msea.2011.03.007

Ni, S. ; Wang, Y. B. ; Liao, X. Z. et al. / Strain softening in nanocrystalline Ni-Fe alloy induced by large HPT revolutions. In: Materials Science and Engineering A. 2011 ; Vol. 528, No. 13-14. pp. 4807-4811.