Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Reexamination Certificate
2005-12-01
2009-06-16
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
C073S597000, C073S602000, C073S628000
Reexamination Certificate
active
07546769
ABSTRACT:
A method and system for microstructural evaluation and degradation evaluation of an object are provided. The method comprises insonifying at least one subvolume of the object with ultrasonic energy at a fundamental frequency and acquiring receive energy from the object at the fundamental frequency and at least one harmonic frequency thereof. A nonlinearity parameter is determined using the receive energy. The nonlinearity parameter is then used to determine a grain size for the subvolume of the object and a variation of the grain size within the object. The nonlinearity parameter is also used to determine fatigue damage or a residual stress.
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Gigliotti Michael Francis Xavier
Keller Michael Everett
Klaassen Richard Eugene
Kommareddy Vamshi Krishna Reddy
Kurkcu Nihat
Clarke Penny A.
General Electric Compnay
M Saint Surin J
Williams Hezron
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