Fatigue Crack Growth Mechanisms in Alumina at High Temperature

MT Kokaly; AS Kobayashi; KW White

doi:10.1520/STP11092S

SYMPOSIA PAPER Published: 01 January 2003

STP11092S

Fatigue Crack Growth Mechanisms in Alumina at High Temperature

Source

The wake fracture process zone (FPZ) of an alumina WL-DCB specimen subjected to cyclic loading at room temperature to 800°C was analyzed by a hybrid experimental-numerical procedure involving phase-shifting moiré interferometry and finite element analysis. A residual crack opening profile was found upon unloading and remained during subsequent cyclic loading. This anomaly is attributed to the butting of fully and partially pulled-out grains and provides a mechanistic explanation for the common notion that monolithic ceramics do not fatigue.

Author Information

Kokaly, MT

Fatigue Technology Inc., Seattle, WA

Kobayashi, AS

University of Washington, Seattle, WA

White, KW

University of Houston, Houston, TX

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Details

Developed by Committee: E08

Pages: 510–523

DOI: 10.1520/STP11092S

ISBN-EB: 978-0-8031-5472-8

ISBN-13: 978-0-8031-2899-6

Fatigue Crack Growth Mechanisms in Alumina at High Temperature

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