Microstructural dependence of cavitation damage in polycrystalline materials. Final report, 1 November 1992--31 October 1994
Microstructure of a sample of Inconel X-750 damaged by ISCC (intergranular stress corrosion cracking) was examined after fatigue precracking in a high-temperature environment of deaerated water. Orientation imaging microscopy was used to reveal the microstructure adjacent to the crack path. General high-angle boundaries were found to be most susceptible to cracking. An ordering of the susceptibilities to ISCC damage was proposed; all boundaries have been classified into one of 12 categories. A model is proposed to predict the crack path for ISCC based on ex situ record of damage probabilities. The cracking is modeled as a Markov chain on a regular hexagonal array of grain boundaries representing the connectivity of the network.
- Research Organization:
- Brigham Young Univ., Provo, UT (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG03-93ER45479
- OSTI ID:
- 212693
- Report Number(s):
- DOE/ER/45479-3; ON: DE96008530
- Resource Relation:
- Other Information: PBD: 5 Feb 1996
- Country of Publication:
- United States
- Language:
- English
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