Development of hardness homogeneity and superplastic behavior in an aluminum–copper eutectic alloy processed by high-pressure torsion
Kawasaki, Megumi, Foissey, Julien and Langdon, Terence G. (2013) Development of hardness homogeneity and superplastic behavior in an aluminum–copper eutectic alloy processed by high-pressure torsion. Materials Science and Engineering A, 561, 118-125. (doi:10.1016/j.msea.2012.10.096).
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Description/Abstract
An Al–33% Cu eutectic alloy was processed by high-pressure torsion (HPT) at a pressure of 6.0 GPa for 1/4 to 10 turns. Examination after processing showed a gradual evolution to a reasonable level of hardness and microstructural homogeneity after 5 or more turns. Tensile tests were conducted at a temperature of 723 K on specimens processed through 5 and 10 turns of HPT. These specimens exhibited excellent superplastic properties with a maximum elongation of ∼1250% at strain rates lower than 10−3 s−1. The results also showed that the maximum elongation is displaced to a faster strain rate when the HPT processing is conducted to a higher number of turns. An analysis demonstrates that superplastic flow in the Al–Cu alloy processed by HPT is well described by a theoretical relationship that was developed for conventional superplastic materials.
| Item Type: | Article |
|---|---|
| ISSNs: | 0921-5093 (print) |
| Related URLs: | |
| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
| Divisions: | Faculty of Engineering and the Environment > Engineering Sciences > Engineering Materials Surface Engineering |
| Item ID: | 345720 |
| Date Deposited: | 28 Nov 2012 14:10 |
| Last Modified: | 28 Nov 2012 14:10 |
| Contributors: | Kawasaki, Megumi (Author) Foissey, Julien (Author) Langdon, Terence G. (Author) |
| Date: | 20 January 2013 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/345720 |
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