| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1500318 | Scripta Materialia | 2010 | 4 Pages |
Abstract
Nucleation of nanograins near crack tips and its role as a special (new) toughening mechanism in deformed nanocrystalline materials are theoretically described. Within our description, stress-driven splitting and migration of grain boundaries occur near crack tips. These stress-driven processes result in nucleation of nanograins and cause a partial stress relaxation near cracks. It is shown that the nucleation of nanograins near crack tips is energetically favorable and effective in enhancing toughness in nanocrystalline ceramic α-Al2O3.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
I.A. Ovid’ko, N.V. Skiba, A.K. Mukherjee,