Under creep conditions, cavity growth may be controlled by vacancy diffusion or power-law creep. These two growth mechanisms are examined with reference to a superplastic Al-Zn-Mg alloy, and it is shown that the predicted dominance of power-law growth is consistent with earlier experimental observations of cavitation in this material.
(Received October 20, 1979)
*Department of Mechanical Engineering, University of Bristol, Bristol BS8 1TR, England.
**Department of Materials Science, University of Southern California, Los Angeles, California 90007, U.S.A.
© 2002 The Japan Institute of Metals
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