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Fractal Characterization of Cavity Shape Changes During Superplastic Deformation of High Strength Aluminium Alloy 7475

Published online by Cambridge University Press:  16 February 2011

Jiang Xinggang ,
Cui Jianzhong  and
Ma Longxiang
Jiang Xinggang
Affiliation:
Department of Metal Forming, P.O.Box 317, Northeast University of Technology, Shenyang 11006, P.R.C.
Cui Jianzhong
Affiliation:
Department of Metal Forming, P.O.Box 317, Northeast University of Technology, Shenyang 11006, P.R.C.
Ma Longxiang
Affiliation:
Department of Metal Forming, P.O.Box 317, Northeast University of Technology, Shenyang 11006, P.R.C.
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Abstract

The fractal dimensions of cavities during superplastic deformation of high strength aluminium alloy 7475 were measured with different strain, temperature, strain rate, and grain size. The results show that the fractal dimension of cavities increases with the increase of strain. Deformation under lower temperature, higher strain rates, or for larger grain sizes corresponds to higher fractal dimensions of cavities. The higher the fractal dimension of cavities, the more complex the cavities' shapes and the more possible it is for the specimen to rupture.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 196: Symposium T – Superplasticity in Metals, Ceramics, and Intermetallics , 1990 , 373
Copyright
Copyright © Materials Research Society 1990

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References

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