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Hot forging characteristics of transformation-toughened Al2O3/ZrO2 composites

Published online by Cambridge University Press:  31 January 2011

B. J. Kellett  and
F. F. Lange
B. J. Kellett
Affiliation:
Materials Department, College of Engineering, University of California, Santa Barbara, California 93106 and University of California, Department of Materials Engineering, Los Angeles, California 90024
F. F. Lange
Affiliation:
Materials Department, College of Engineering, University of California, Santa Barbara, California 93106 and University of California, Department of Materials Engineering, Los Angeles, California 90024
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Abstract

Fine grain, transformation-toughened Al2O3/ZrO2 (tetragonal, 5–30 vol. %) composites can exhibit both large deformation strains (80%) and strain rates (> 0.001 s−1) without tearing, cavitating, or cracking during hot forging at 1500 °C. Deformability increases with ZrO2 content. The Al2O3 grains grow, develop a crystallographic orientation, and form column structures with increasing deformation. The deformation behavior of the composite series primarily depends on the content of the ZrO2 phase. In this regard, two deformation regimes were observed that appear to be separated by the volume fraction where the ZrO2 phase might form a connective network.

Type
Articles
Information
Journal of Materials Research , Volume 3 , Issue 3 , June 1988 , pp. 545 - 551
Copyright
Copyright © Materials Research Society 1988

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References

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