Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1502482 | Scripta Materialia | 2006 | 4 Pages |
Abstract
The microhardness of Al–0.06 Sc–0.02 RE alloys (at.%, with RE (rare-earth) = Dy, Er, Gd, Sm, Y, or Yb) is measured as a function of aging time at 300 °C. As compared to Al–0.08 Sc, the ternary alloys exhibit: (i) the same incubation time, except for Al–0.06 Sc–0.02 Yb which hardens much faster; (ii) the same or reduced peak microhardnesses (which are higher than for Al–0.06 Sc); and (iii) the same over-aging behavior. All REs segregate to the core of Al3(Sc1−xREx) precipitates.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Richard A. Karnesky, Marsha E. van Dalen, David C. Dunand, David N. Seidman,