| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1447080 | Acta Materialia | 2011 | 9 Pages |
Abstract
A new mechanism of fracture toughness enhancement in nanocrystalline metals and ceramics is suggested. The mechanism represents the cooperative grain boundary (GB) sliding and stress-driven GB migration process near the tips of growing cracks. It is shown that this mechanism can increase the critical stress intensity factor for crack growth in nanocrystalline materials by a factor of three or more and thus considerably enhances the fracture toughness of such materials.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
I.A. Ovid’ko, A.G. Sheinerman, E.C. Aifantis,