Microstructural dependence of cavitation damage in polycrystalline materials. Final report, 1 November 1992--31 October 1994

Technical Report · Mon Feb 05 04:00:00 EST 1996

DOI:https://doi.org/10.2172/212693· OSTI ID:212693

Adams, B L

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
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRACKS
GRAIN BOUNDARIES
INCONEL X750
INTERGRANULAR CORROSION
MARKOV PROCESS
MICROSCOPY
MICROSTRUCTURE
STRESS CORROSION