High-temperature plastic deformation of Y2O3-stabilized ZrO2 single crystals III. Variation in work hardening between 1200 and 1500°C
- 1 March 1991
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 63 (3) , 377-388
- https://doi.org/10.1080/01418619108213886
Abstract
Plastic deformation has been studied in Y2O3-stabilized ZrO2 single crystals oriented for easy {001} 〈110〉 slip between 1200 and 1500°C. The yield stress shows a linear dependence on temperature because defect clusters act as discrete obstacles. These clusters also cause screw dislocations to become jogged, leading to ready production of edge dipoles and very high work-hardening rates (about μ/15). The high hardening on the primary system allows activation of secondary {111} 〈100〉 slip, which causes an apparent yield point at the higher temperatures.Keywords
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