Abstract
Shear localization is studied in simulated amorphous systems containing individual nanocrystalline inclusions. Systematic variation of the inclusion diameter and the shear band thickness reveals a crossover in length scales that separates distinct plastic flow mechanisms in and around the nanocrystalline inclusion. When considered relative to the shear band thickness, small inclusions deform via heterogeneous, interface-dominated mechanisms, while large inclusions yield via the homogeneous nucleation of dislocations in the nanocrystal interior; nanocrystals roughly twice as large as the shear band width are required for the strongest interaction.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 603-611 |
| Number of pages | 9 |
| Journal | Philosophical Magazine Letters |
| Volume | 87 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2007 |
Funding
This work was supported at MIT by the US Army Research Office under contract DAAD19-03-1-0235 and the US Office of Naval Research under contract N00014-04-1-0669.
ASJC Scopus subject areas
- Condensed Matter Physics