Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1502752 | Scripta Materialia | 2008 | 4 Pages |
Abstract
Aluminum alloy 6082 was subjected to equal-channel angular pressing (ECAP), which resulted in an ultra-fine-grained (UFG) microstructure with an average grain size of 0.2–0.4 μm. There was a pronounced effect of the grain refinement on the strain-rate sensitivity and tensile ductility. The Hart criterion of tensile necking fails to explain the observed ductility of the UFG material at low strain rates. A correlation between the observed stronger-than-expected ductility and a tendency to microshear band formation at low strain rates was established.
Keywords
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
I. Sabirov, Y. Estrin, M.R. Barnett, I. Timokhina, P.D. Hodgson,