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Superplastic Deformation of an Al-Li-Cu-Zr Alloy under Uniaxial and Biaxial Tension

Published online by Cambridge University Press:  16 February 2011

Ho-Sung Lee  and
Amiya K. Mukherjee
Ho-Sung Lee
Affiliation:
Department of Mechanical, Aeronautical & Materials Engineering, University of California, Davis, CA. 95616, U.S.A.
Amiya K. Mukherjee
Affiliation:
Department of Mechanical, Aeronautical & Materials Engineering, University of California, Davis, CA. 95616, U.S.A.
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Abstract

The superplasticity of an Al-Li-Cu-Zr alloy has been studied under uniaxial tension and biaxial bulging conditions using hydrostatic pressure. An optimum tensile elongation of 850% at a strain rate of 3×10−4 /sec was obtained at 758 K. The maximum true thickness strain was 1.22 for a biaxially deformed specimen under the same conditions. It was shown that strain rate dependent flow hardening was related to necking profile. It was observed that cavity growth during superplastic deformation depended on the type of loading. Under biaxial bulging conditions, the cavities grew by forming cavity fissure networks along the grain boundaries. It was found that, by the superimposition of hydrostatic pressure, cavitation was retarded and the superplastic ductility was increased in both tensile and biaxial deformation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 196: Symposium T – Superplasticity in Metals, Ceramics, and Intermetallics , 1990 , 221
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

1. Wadsworth, J., Palmer, I., Crooks, D., Lewis, R., in Aluminium-Lithium Alloys II, edited by Starke, E. and Sanders, T.(TMS-AIME, Warrendale, PA., 1984) pp. 111–135.Google Scholar
2. Pilling, J. and Ridley, N., Res. Mech., 23, 31 (1988).Google Scholar
3. Ragab, A. R., Metal. Tech., 10, 340–348 (1983).Google Scholar
4. Caceres, C. H. and Wilkinson, D. S., Acta. Met., 32, 417 (1984).Google Scholar
5. McNelley, T. R., Lee, E. W. and Mills, M. E., Met. Trans., 17A, 1035 (1986).Google Scholar
6. Ridley, N., Livesey, D. W. and Pilling, J., Journal de Physique, 48 (C3), 251–256 (1987).Google Scholar
7. Hamilton, C. H., in Strength of Metals and Alloys(ICSMA 7), edited by McQueen, H., Bailon, J., Dickson, J. T., Jonas, J. J., Akben, M. G. (Pergamon Press, Oxford, 1986) 3, pp. 1831–1857.Google Scholar
8. Chokshi, A. H., Mukherjee, A. K., Mater. Sci. Eng., A110, 49–60 (1989).Google Scholar
9. Nichols, F. A., Acta. Met., 28, 670 (1980).Google Scholar
10. Okabe, T., Hatayama, T., Takei, H., in Superplasticity and Superplastic Forming, edited by Hamilton, C. H., Paton, N. E. (TMS, Warrendale, PA., 1988) pp. 185–189.Google Scholar
11. Avery, D. H., Stuart, J. M., Surfaces and Interfaces II, edited by Burke, J. J., Reed, N. L., Weiss, V. (14th Proc. Sagamore Army Mat. Res. Conf., Syracuse University Press, 1967), pp. 371–392.Google Scholar
12. Santhanam, A. T., Reed-Hill, R. E., Met. Trans., 2, pp. 2619–2622 (1971).Google Scholar
13. Lee, H. S., Mukherjee, A. K., in preparation.Google Scholar
14. Ma, Y., Langdon, T. G., in Superplasticity and Superplastic Forming, edited by Hamilton, C. H., Paton, N. E. (TMS, Warrendale, PA., 1988) pp. 173–178.Google Scholar