Effect of grain size on superplastic behavior of Al2O3/YTZ
- 1 November 1990
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 5 (11) , 2613-2615
- https://doi.org/10.1557/jmr.1990.2613
Abstract
Grain size strongly influences the superplastic properties of a fine-grained, 20 wt.% Al2O3-reinforced, Y2O3-stabilized tetragonal ZrO2 (Al2O3/YTZ). The elongation to failure of the material decreases, and the flow strength increases, with increasing grain size. The flow stress at a constant true strain rate and at a given strain is proportional to the grain size raised to a 0.75 power. As a result, the superplastic deformation rate in Al2O3/YTZ is inversely proportional to the grain size raised to a 1.5 power.Keywords
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