Grain size effect on deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy


Ni, S., Wang, Y.B., Liao, X. Z., Alhajeri, S.N., Li, Hh. Q., Ringer, S. P., Langdon, T.G. and Zhu, Y.T. (2011) Grain size effect on deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy. Materials Science Forum, (667-669), 181-186. (doi:10.4028/www.scientific.net/MSF).

Download

Full text not available from this repository.

Description/Abstract

The effect of grain size on the deformation twinning and de-twinning in a nanocrystalline Ni-Fe alloy was investigated using transmission electron microscopy. Specimens with different grain sizes were obtained by severely deforming an electrochemically deposited nanocrystalline Ni-20wt.% Fe alloy using high-pressure torsion, which resulted in continuous grain growth from an average grain size of ~ 21 nm in the as-deposited material to ~ 72 nm for the highest strain applied in this study. Results show that deformation de-twinning occurs at very small grain sizes while deformation twinning takes place when the grain size is larger than ~ 45 nm. The mechanism of the observed grain size effect on twinning and de-twinning is briefly discussed.

Item Type: Article
ISSNs: 1662-9752 (print)
Related URLs:
Subjects: T Technology > TP Chemical technology
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 187529
Date Deposited: 17 May 2011 09:58
Last Modified: 27 Mar 2014 19:41
URI: http://eprints.soton.ac.uk/id/eprint/187529

Actions (login required)

View Item View Item