Abstract
Hastelloy X, a nickel based superalloy, has been extensively used in the past for high temperature applications. However, less is known about its thermomechanical fatigue response compared to other structural metals. Generally, the relation between microscale and macroscale is vital in order to identify specific phenomena that contribute to the cracked component fatigue lifetime. In this work, Hastelloy X notched samples were used to investigate fatigue crack nucleation near the notch and subsequent fatigue crack growth. Isothermal experiments at varying temperatures (up to 1, 000°C) were performed while the specimen was fatigue loaded to advance the crack. Macroscale Digital Image Correlation (DIC) was performed on images taken at various stages of crack growth. In addition, using images obtained directly behind the crack tip, microscale DIC was used to quantify the effects of crack closure. The interaction of crack closure and far-field loading was investigated as a function of temperature. The combination of full-field macroscale and near-tip microscale measurements will aid in the development and understanding of a multiscale fatigue crack growth model.
| Original language | English (US) |
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| Title of host publication | Society for Experimental Mechanics - SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2010 |
| Pages | 2041-2044 |
| Number of pages | 4 |
| Volume | 3 |
| State | Published - Nov 9 2010 |
| Event | SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2010 - Indianapolis, IN, United States Duration: Jun 7 2010 → Jun 10 2010 |
Other
| Other | SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2010 |
|---|---|
| Country/Territory | United States |
| City | Indianapolis, IN |
| Period | 6/7/10 → 6/10/10 |
ASJC Scopus subject areas
- Mechanics of Materials