Determination of subcritical crack growth parameters by in situ observation of indentation cracks
Journal Article
·
· Journal of the American Ceramic Society
- Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering
A technique to determine stress intensity factor-crack velocity (K-v) relationships for subcritical crack growth for in situ observation of indentation cracks is described. To minimize the effect of residual contact stresses and lateral crack interaction, measurements were made only on cracks that had undergone significant subcritical crack growth. Crack shapes were determined fractographically from crack-arrest markings, produced by temporary unloading during the crack extension process. The subcritical crack growth parameters obtained by this technique were in excellent agreement with those determined from dynamic fatigue and previous studies.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-86ER45252
- OSTI ID:
- 106006
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 8 Vol. 78; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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