J. Wayne Jones

Professor Emeritus

jonesjwa@umich.edu

2022 Gerstacker

T: (734) 764-7503

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This program addresses the growing need to more rapidly develop sound life prediction and life monitoring methodologies aero engine components, specifically those using nickel base superalloys. The current program expands the investigation of the current AFOSR research at the University of Michigan to include a critical investigation of the capabilities of ultrasonic fatigue techniques in life prediction of nickel base superalloys. The fatigue behavior (stress range, mean stress, temperature vs. cycles to failure) of Rene 88DT is being investigated in the range of 105 to 109 cycles using ultrasonic fatigue instrumentation to develop a statistically significant database of fatigue behavior for carefully chosen test conditions. The capability of this approach for high temperature fatigue crack growth from small notches and similar defects is also being examined.