Abstract
The static fatigue resistance of a commercial low-cost alumina is evaluated. Flexural stress rupture results are compared to fracture mechanics crack growth testing. The original goal of this work was to develop satisfactory experimental procedures for the two test methods prior to more extensive testing on high-performance ceramics such as silicon nitride. The static fatigue trends measured by the two methods are comparable at 1000° C. The results are consistent with a model of static fatigue involving microcrack growth, coalescence and fracture due to stress corrosion. Creep deformations are very small, suggesting that creep fracture is not the mechanism of failure. A refined method for double torsion testing is presented.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
