Superplasticity of Ultrafine-Grained Aluminum Alloy Processed by ECAP and Warm Rolling
The ultrafine-grained (UFG) 1421 aluminum alloy processed by equal channel angular pressing (ECAP) has demonstrated enhanced superplasticity at low temperature and high strain rates. This UFG material was successfully rolled at temperatures of 330-370oC retaining small grain size and equiaxed grain structure. The microstructure of the UFG alloy subjected to warm rolling (WR) was studied, and the mechanical properties of the ECAP+WR samples with UFG structures were investigated. We have found that the rolled material exhibited not only the enhanced superplasticity, but also high strength at room temperature.
R. K. Islamgaliev et al., "Superplasticity of Ultrafine-Grained Aluminum Alloy Processed by ECAP and Warm Rolling", Materials Science Forum, Vols. 551-552, pp. 13-20, 2007