Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1448314 | Acta Materialia | 2009 | 10 Pages |
Abstract
Nanocrystalline Al–5 at.% Fe alloy powders produced by mechanical alloying were consolidated by spark plasma sintering. The sintered sample showed high strength >1000 MPa with a large plastic strain of 15% at room temperature and 500 MPa at 350 °C. Microstructure characterizations by transmission electron microscopy and atom probe tomography revealed that the sintered samples are composed of α-Al and Al6Fe nanocrystalline regions with 90 nm in diameter and a minor fraction of Al13Fe4 phase and coarsened 0.5–1 μm α-Al grains. This bimodally grained feature is attributed to the relatively large plastic strain for the strength level of 1000 MPa at room temperature.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
T.T. Sasaki, T. Ohkubo, K. Hono,