Paper Title:
Grain Size Effect on Deformation Twinning and De-Twinning in a Nanocrystalline Ni-Fe Alloy
  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.

  Info
Periodical
Materials Science Forum (Volumes 667-669)
Edited by
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
Pages
181-186
DOI
10.4028/www.scientific.net/MSF.667-669.181
Citation
S. Ni, Y. B. Wang, X. Z. Liao, S. N. Alhajeri, H.Q. Li, S. P. Ringer, T. G. Langdon, Y. T. Zhu, "Grain Size Effect on Deformation Twinning and De-Twinning in a Nanocrystalline Ni-Fe Alloy", Materials Science Forum, Vols. 667-669, pp. 181-186, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zhi Guo Chen, Zi Qiao Zheng, Dong Feng Han
Abstract:The hot deformation behaviors and microstructure in Al-Cu-Li alloy containing small amount of Ag and Mg were investigated by transmission...
1925
Authors: J.L. Collet, Françoise Bley, Alexis Deschamps, Colin Scott
Abstract:The deformation mechanisms of an Fe-Mn-C TWIP steel have been investigated as a function of deformation and deformation temperature, using...
822
Authors: Y.Q. Wu, Han Huang, Jin Zou
Abstract:In this work, deformation of monocrystalline silicon (Si) under nanoscratching was investigated using transmission electron microscopy...
15
Authors: Xiao Yu Zhong, Guang Jie Huang, Fang Fang He, Qing Liu
Abstract:Uni-axial tensile plastic deformation behavior of rolled magnesium alloy AZ31B under the temperature range from room temperature(RT) to 250°C...
219
Authors: Feng Zhao, Ling Yong Cao, Yu Jing Lang, Hua Cui, Lin Zhong Zhuang, Ji Shan Zhang
Abstract:The diversities and relations of microstructures and properties between the center and surface layer in thick-plate 7150 alloy were...
250