Abstract
Cyclic fatigue crack growth and crack-resistance behaviour was studied in partially stabilized zirconia (PSZ) with three different cubic-phase grain sizes following sub-eutectoid heat treatments. Raman spectroscopy was used to determine the extent of phase transformation around the cracks for both cyclic and monotonic loading conditions. All tests were on “long”, through thickness cracks using compact-tension specimens. Predictions of crack-tip shielding were made following determination of toughening parameters using crackresistance data. It was found that the dominant factors affecting cyclic fatigue-crack growth were the level of crack-tip shielding, as a result of phase transformation, and the intrinsic toughness of the material. Grain size did not appear to significantly affect fatigue crack-growth behaviour.
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Hoffman, M.J., Mai, YW., Dauskardt, R.H. et al. Grain size effects on cyclic fatigue and crack-growth resistance behaviour of partially stabilized zirconia. Journal of Materials Science 30, 3291–3299 (1995). https://doi.org/10.1007/BF00349872
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DOI: https://doi.org/10.1007/BF00349872