Abstract
1. A cast alloy of Al-3% Mg-0.2% Sc was subjected to equal-channel angular pressing at room temperature to a total strain of ∼8. Following ECA pressing, the microstructure was heterogeneous with small areas of subgrains interspersed within larger areas of grains having boundaries with high angles of misorientation. The average grain size was ∼0.2 μm. 2. Static annealing revealed that the microstructure was thermally stable because of the presence of the dilute scandium addition. The grain size remained at <1 μm after annealing for 1 hour at temperatures up to 673 K. 3. The alloy exhibited high strain rate superplasticity with an elongation of 1030% when tested in tension at 673 K using an initial strain rate of 3.3 × 10-2 s-1.
Original language | English |
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Pages (from-to) | 1851-1856 |
Number of pages | 6 |
Journal | Scripta Materialia |
Volume | 38 |
Issue number | 12 |
DOIs | |
Publication status | Published - May 12 1998 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys