Abstract
The dislocation creep behavior of coarse-grained binary AlSc alloys was studied. The presence of coherent Al3Sc precipitates within the aluminum matrix was observed in the Al-0.07 wt.% Sc specimen. The Al3Sc precipitates were coherent with a mean size of 26±2 nm and were present a number density of (2.4±0.9)×1014 cm-3. The AlSc alloys exhibited a threshold stress which was dependent on the volume fraction and size of the precipitates.
Original language | English (US) |
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Pages (from-to) | 691-696 |
Number of pages | 6 |
Journal | Scripta Materialia |
Volume | 40 |
Issue number | 6 |
DOIs | |
State | Published - Feb 19 1999 |
Funding
We would like to thank Dr. R. W. Hyland Jr. (ALCOA Technical Center, ALCOA Center, PA) for many useful discussions concerning the physical metallurgy of Al(Sc) alloys, for donation of high-purity aluminum, and for chemical analysis of the alloys. We also thank Mr. Dmitriy Gorelikov (Northwestern University) for many useful discussions concerning the physical metallurgy of Al(Sc) alloys and for generously and patiently reading the Russian literature on this subject for us. Mr. C. B. Fuller was partially supported by a Walter P. Murphy Fellowship (Northwestern University) and the National Science Foundation (grant number DMR-9728986: Dr. B. MacDonald, grant officer).
ASJC Scopus subject areas
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys