Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1501699 | Scripta Materialia | 2009 | 4 Pages |
Abstract
Ultrafine-grained (0.7 μm) Al–Mg–Sc alloy with an approximately random misorientation distribution and predominantly high-angle boundaries of 97% was produced by friction stir processing. A ductility of 235% was obtained at 200 °C. Increasing temperature from 200 to 300 °C resulted in an increase in superplasticity, optimum strain rate and strain rate sensitivity. Low temperature and high strain rate superplasticity with a ductility of 620% was achieved at 300 °C and 3 × 10−2 s−1. Abnormal grain growth occurred at 350 °C, resulting in the disappearance of superplasticity.
Keywords
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
F.C. Liu, Z.Y. Ma, L.Q. Chen,