Measuring and testing – Vibration – By mechanical waves
Patent
1991-07-26
1992-04-07
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73606, G01N 2904
Patent
active
051016630
ABSTRACT:
The strength of a join between a ceramic and an associated non-ceramic is determined using an ultrasonic microscope. A converging ultrasonic beam is radiated against a point on a surface of the ceramic, said point being a predetermined distance away from the join between the ceramic and the associated non-ceramic. Data on the intensities of interference waves at respective predetermined variations of the relative distance between a probe of the ultrasonic microscope and the ceramic are collected. The residual stress at the point is calculated on the basis of the cycle of echo intensities of the interference waves for the respective predetermined variations of the relative distance. The strength of the join is then determined on the basis the residual stress.
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Ishikawa Isao
Ishikawa Tatuo
Narita Toshio
Arana Louis M.
Hitachi Construction Machinery Co. Ltd.
Williams Hezron E.
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