Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1499712 | Scripta Materialia | 2011 | 4 Pages |
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.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
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,