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Fatigue of Yttria‐Stabilized Zirconia: II, Crack Propagation, Fatigue Striations, and Short‐Crack Behavior
Author(s) -
Liu ShihYu,
Chen IWei
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb04089.x
Subject(s) - stress intensity factor , materials science , crack closure , fracture mechanics , residual stress , paris' law , stress concentration , striation , fracture (geology) , stress (linguistics) , yttria stabilized zirconia , composite material , crack growth resistance curve , cubic zirconia , ceramic , linguistics , philosophy
Fatigue crack propagation in 3Y‐TZP was investigated using controlled surface flaws. A unique growth law strongly dependent on the maximum stress intensity factor and quadratically dependent on the amplitude of the range of stress intensity factor was established. This growth law was found to apply for both surface flaws and internal flaws and could be used to predict fatigue lifetime. The presence of residual stress altered the growth mechanics so that an inverse growth rate dependence on the applied stress, reminiscent of the so‐called “short‐crack behavior,” was manifested. Fatigue striations resulting from alternate overload fracture and fatigue fracture during stress cycling were observed. The appearance of striations varied with the R ratio and was very sensitive to the loading condition and crack geometry.