| Autor: |
Krug, Matthew E., Dunand, David C., Seidman, David N. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 3/24/2008, Vol. 92 Issue 12, p124107, 3p, 1 Color Photograph, 1 Chart, 2 Graphs |
| Abstrakt: |
An Al–11.3Li–0.11Sc (at. %) alloy was double aged to induce first α′-Al3Sc and then δ′-Al3Li precipitates. Atom-probe tomography revealed both single-phase δ′-precipitates and core-shell α′/δ′-precipitates (with respective average radii of 16 and 27 nm and respective volume fractions of 12% and 9%) conferring a high strength to the alloy. Although the δ′-shells contain little Sc (∼0.027 at. %), the α′-cores have a high Li content, with an average composition of Al0.72(Sc0.17Li0.11). The Li concentrations within the δ′-phase and the Li interfacial excess at the δ′/α′-interface both exhibit wide precipitate-to-precipitate variations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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