High strain rate superplasticity of a {beta}-Si{sub 3}N{sub 4} whisker reinforced pure aluminium composite made by squeeze casting
- National Industrial Research Inst. of Nagoya (Japan)
- Kanagawa High-Technology Foundation, Kawasaki (Japan)
- Industrial Research Inst. of Kanagawa, Yokohama (Japan)
- Ecole Polytechnique de Montreal, Quebec (Canada)
High strain rate superplasticity (HSRS) in ceramic whisker or particulate reinforced aluminum alloy composites is expected to offer an efficiently near-net shape forming technique to automobile, aerospace, and even semi-conductor industries, since the HSRS composites usually exhibit a total elongation of 250--600% at a high strain rate of about 0.1--10 s{sup {minus}1}. It is thought that primary deformation mechanism of the HSRS is grain boundary sliding since the composites have the fine grain size of 3{approximately}0.8 {micro}m. The purpose of this study is to develop a thermomechanical processing route to produce a fine microstructure and a HSRS in a {beta}-Si{sub 3}N{sub 4} whisker reinforced 99.99% pure aluminum composite fabricated by squeeze casting. In addition, superplastic deformation mechanism of the composite are also discussed.
- OSTI ID:
- 247985
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 10 Vol. 34; ISSN 1359-6462; ISSN XZ503X
- Country of Publication:
- United States
- Language:
- English
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