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Influence of Equal-Channel Angular Pressing on the Superplastic Properties of Commercial Aluminum Alloys

Published online by Cambridge University Press:  10 February 2011

Sungwon Lee  and
Terence G. Langdon
Sungwon Lee
Affiliation:
Departments of Materials Science and Mechanical Engineering University of Southern California, Los Angeles, CA 90089-1453, U.S.A. langdon@usc.edu
Terence G. Langdon
Affiliation:
Departments of Materials Science and Mechanical Engineering University of Southern California, Los Angeles, CA 90089-1453, U.S.A. langdon@usc.edu
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Abstract

Equal-channel angular (ECA) pressing was used to refine the microstructure in two commercial aluminum alloys, Al-2024 and the Supral-100 Al-2004 alloy. The ECA pressing was conducted at room temperature and at elevated temperatures for both alloys using several different processing routes. Tensile testing was carried out at elevated temperatures on both pressed and unpressed samples of each alloy in order to evaluate the effect of the pressing. This paper describes the influence of the ECA pressing on the subsequent mechanical properties of these two alloys. For both alloys, it is shown that the optimum superplastic conditions are influenced by the ECA pressing, and in practice there tends to be a decrease in the optimum temperature for superplasticity and a corresponding increase in the optimum strain rate. In addition, there was evidence for high strain rate superplasticity (HSR SP) in both alloys after the ECA pressing procedure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 601: Symposium HH – Superplasticity-Current Status & Future Potential , 1999 , 359
Copyright
Copyright © Materials Research Society 2000

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References

1. Ma, Y., Furukawa, M., Horita, Z., Nemoto, M., Valiev, R.Z. and Langdon, T.G., Mater. Trans. JIM 37, 336 (1996).10.2320/matertrans1989.37.336Google Scholar
2. Smirnova, N.A., Levit, V.I., Pilyugin, V.I., Kuznetsov, R.I., Davydova, L.S. and Sazonova, V.A., Fiz. Metall. Metalloved. 61, 1170 (1986).Google Scholar
3. Segal, V.M., Reznikov, V.I., Drobyshevskiy, A.E. and Kopylov, V.I., Russian Metall. (Metally) 1, 99 (1981).Google Scholar
4. Valiev, R.Z., Krasilnikov, N.A. and Tsenev, N.K., Mater. Sci. Eng. A137, 35 (1991).10.1016/0921-5093(91)90316-FGoogle Scholar
5. Valiev, R.Z. and Tsenev, N.K. in Hot Deformation of Aluminum Alloys, edited by Langdon, T.G., Merchant, H.D., Morris, J.G. and Zaidi, M.A. (The Minerals, Metals and Materials Society, Warrendale, PA, 1991), p. 319.Google Scholar
6. Valiev, R.Z., Kaibyshev, O.A., Kuznetsov, R.I., Musalimov, R. Sh. and Tsenev, N.K., Soviet Phys. Dokl. 33, 626 (1988).Google Scholar
7. Valiev, R.Z., Korznikov, A.V. and Mulyukov, R.R., Mater. Sci. Eng. A168, 141 (1993).10.1016/0921-5093(93)90717-SGoogle Scholar
8. Valiev, R.Z., Salimonenko, D.A., Tsenev, N.K., Berbon, P.B. and Langdon, T.G., Scripta Mater. 37, 1945 (1997).10.1016/S1359-6462(97)00387-4Google Scholar
9. Berbon, P.B., Furukawa, M., Horita, Z., Nemoto, M., Tsenev, N.K., Valiev, R.Z. and Langdon, T.G., Phil. Mag. Lett. 78, 313 (1998).10.1080/095008398177896Google Scholar
10. Lee, S., Berbon, P.B., Furukawa, M., Horita, Z., Nemoto, M., Tsenev, N.K., Valiev, R.Z. and Langdon, T.G., Mater. Sci. Eng. A272, 63 (1999).10.1016/S0921-5093(99)00470-0Google Scholar
11. Iwahashi, Y., Wang, J., Horita, Z., Nemoto, M. and Langdon, T.G., Scripta Mater. 35, 143 (1996).10.1016/1359-6462(96)00107-8Google Scholar
12. Furukawa, M., Iwahashi, Y., Horita, Z., Nemoto, M. and Langdon, T.G., Mater. Sci. Eng. A257, 328 (1998).10.1016/S0921-5093(98)00750-3Google Scholar
13. Oh-ishi, K., Horita, Z., Furukawa, M., Nemoto, M. and Langdon, T.G., Metall. Mater. Trans. 29A, 2011 (1998).10.1007/s11661-998-0027-zGoogle Scholar
14. Grimes, R., Baker, C., Stowell, M.J. and Watts, B.M., Aluminium 51, 720 (1975)Google Scholar
15. Grimes, R., Stowell, M.J. and Watts, B.M., Metals Tech. 3, 154 (1976).10.1179/030716976803391764Google Scholar
16. Watts, B.M., Stowell, M.J., Baikie, B.L. and Owen, D.G.E., Metal Sci. 10, 189 (1976).Google Scholar
17. Watts, B.M., Stowell, M.J., Baikie, B.L. and Owen, D.G.E., Metal Sci. 10, 198 (1976).Google Scholar
18. Barnes, A.J., Mater. Sci. Forum 170–172, 701 (1994).10.4028/www.scientific.net/MSF.170-172.701Google Scholar
19. Barnes, A.J., Mater. Sci. Forum 304–306, 785 (1999).10.4028/www.scientific.net/MSF.304-306.785Google Scholar