|
|||||
|
|
Annealing behaviour of ultrafine-grained aluminium |
|
| Authors: | Pei-Ling Sun Yonghao Zhao Tien-Yu Tseng Jiunn-Ren Su Enrique J. Lavernia |
| Affiliation: | 1. Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwanplsun@fcu.edu.tw;3. Nanostructural Materials Research Center, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;4. New Materials Research and Development Department, China Steel Corporation, Kaohsiung 81233, Taiwan;5. Department of Chemical Engineering and Materials Science, University of California, Davis, CA 95616, USA |
| Abstract: | Ultrafine-grained (UFG) aluminium, processed under fast cooling rate conditions (12?K?s?1) following hot rolling (water quenched) exhibits enhanced thermal stability due to an increase in concentration of solid solution atoms, relative to the furnace cooled material. The influence of fraction recrystallized on yield stress and uniform elongation is reported to exhibit a slight deviation from the linear behaviour that is anticipated on the basis of the rule-of-mixtures. This result was rationalized on the basis of differences in the spatial distributions of the UFG and coarse grains and/or dislocation recovery mechanisms. |
| Keywords: | aluminium hot and cold rolling annealing cooling rate mechanical property |