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

Brent L. Adams | Zendy

Open Access

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

Author(s) -

Brent L. Adams

Publication year - 1996

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/212693

Subject(s) - intergranular corrosion , grain boundary , microstructure , materials science , cracking , crystallite , inconel , stress corrosion cracking , cavitation , composite material , metallurgy , corrosion , mechanics , physics , alloy

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

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