Measuring and testing – Vibration – By mechanical waves
Patent
1991-01-28
1992-10-13
Chapman, John E.
Measuring and testing
Vibration
By mechanical waves
73643, G01N 2918
Patent
active
051540819
ABSTRACT:
The system for field measurement of texture, stress and related material properties such as formability parameters using ultrasonic velocity measurements through crystalline plate or sheet. Electromagnetic acoustic transducers are utilized to generate, transmit, and receive ultrasonic bursts through the plate at different angular orientations with respect to the plane of the plate. Two of the transducers are driven in series when generating the ultrasonic bursts. Time measurements between transmission and reception of the bursts are precisely derived and converted into velocities. Information regarding stress, texture, and other related material properties such as formability parameters can be derived from these velocity measurements. The system is adjustable to be used for both ferrous and nonferrous crystalline plate. Alteration of the types of ultrasonic waves utilized, and the methods of generating the waves allows different properties such as texture and stress to be derived.
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Alers George A.
Thompson Robert B.
Wormley Samuel J.
Chapman John E.
Iowa State University & Research Foundation, Inc.
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