Valid KIC Determination via In-Test Subcritical Precracking of Chevron-Notched Bend Bars |
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| Authors: | Jason Sung Patrick S. Nicholson |
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| Affiliation: | Ceramic Engineering Research Group, Department of Materials Science and Engineering, McMaster University, Hamilton, Ontario, Canada |
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| Abstract: | The initiation of the crack in a chevronnotched bend bar was studied. Ideal testing conditions depend strongly on specimen preparation and material; valid KIC values do not always result. An in-test precracking technique was developed for ceramics at room and elevated temperatures. A yttria-partially-stabilized zirconia ceramic was tested, and the results showed that ideal testing conditions were obtained, which guaranteed valid KIC determination. |
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| Keywords: | mechanical properties toughness partially stabilized zirconia yttrium cracks |
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