Abstract
A 66° [1̄10] asymmetric tilt grain boundary in Al prepared by cold rolling and annealing has been studied by high-resolution electron microscopy. Due to a 4.5° deviation from the perfect Σ3 misorientation, the boundary is heavily faceted with straight segments running parallel to (1̄1̄1) and (112) planes. All atomic sites across the (1̄1̄1) facets appear to be coincident with the (111) planes at an angle of 66°. The line defects which accommodate the deviation from the perfect twin orientation result in grain boundary stepping. The observed structural features can be described in terms of secondary grain boundary dislocations with Burgers vectors of the type 1/3〈111〉, and 1/6〈112〉 as well as their interactions.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 139-144 |
| Number of pages | 6 |
| Journal | Materials Research Society Symposium - Proceedings |
| Volume | 466 |
| State | Published - 1997 |
| Event | Proceedings of the 1996 MRS Fall Meeting - Boston, MA, USA Duration: Dec 4 1996 → Dec 5 1996 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering