Authors: Koji Takahashi Kae Iwanaka Toshio Osada Hitonobu Koike
Publish Date: 2015/07/21
Volume: 24, Issue: 9, Pages: 3573-3578
Abstract
The effects of shot peening SP on the strength of partially stabilized zirconia PSZ were studied The compressive residual stress apparent fracture toughness K C and bending strength values of specimens subjected to SP were investigated Results of xray diffraction analyses showed that SP introduced large compressive residual stress in specimens As a result the K C and bending strength values of specimens having semielliptical precracks on their surfaces increased significantly Shotpeened specimens having surface precracks with lengths less than 140 µm exhibited strength comparable to that of smooth specimens and fractured outside the precrack zone indicating that the precracks were rendered harmless by SP Thus the introduction of a compressive residual stress by SP is an effective technique for increasing the strength of PSZ
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