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A Quantitative Study of Cavity Evolution in An Al-Cu-Zr Alloy

Published online by Cambridge University Press:  16 February 2011

Xiaoyu Zhao and
Terence G. Langdon
Xiaoyu Zhao
Affiliation:
Departments of Materials Science and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089–1453
Terence G. Langdon
Affiliation:
Departments of Materials Science and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089–1453
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Abstract

Experiments were conducted on a superplastic aluminum-based alloy containing 6% Cu and 0.5% Zr. Specimens were pulled in tension under selected experimental conditions and then polished and examined with an optical microscope connected through a video camera to an image monitor and a personal computer. A software package was used to provide quantitative information on the cavity morphologies including the number of cavities in a selected area, their size, their deviation from a circle, and the orientation of their longest length with respect to the tensile axis. Results are presented showing the change in cavity morphology with elongation and the effect of testing at different strain rates.

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