Theory and numerical calculation of the acoustic field produced in metal by an electromagnetic ultrasonic transducer. [Nonmagnetic metal]

Journal Article · Mon Nov 01 00:00:00 EST 1976 · J. Acoust. Soc. Am.; (United States)

DOI:https://doi.org/10.1121/1.381208· OSTI ID:5460283

Kawashima, K

The equations for calculating the acoustic field produced within a nonmagnetic metal by an interaction of eddy current with a static magnetic field were obtained on the assumptions that an ultrasonic wave is generated by the electromagnetic force through classical and macroscopic phenomena; the electric, magnetic, and elastic properties of the metal are linear, isotropic, and homogeneous throughout the metal, which occupies semi-infinite space; the whole system is axially symmetric; and eddy currents and elastic waves show a steady-state sinusoidal variation. The acoustic field produced by a specific electromagnetic ultrasonic transducer with axial symmetry was calculated numerically, and the results showed a well-defined ultrasonic wave beam, which was narrower than had been expected from the size of the transducer. 14 figures, 5 tables.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 5460283
• Journal Information: J. Acoust. Soc. Am.; (United States), Vol. 60:5
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
METALS
ULTRASONIC WAVES
EDDY CURRENTS
ELASTICITY
ELECTROMAGNETIC INTERACTIONS
MAGNETIC FIELDS
TRANSDUCERS
BASIC INTERACTIONS
CURRENTS
ELECTRIC CURRENTS
ELEMENTS
INTERACTIONS
MECHANICAL PROPERTIES
SOUND WAVES
TENSILE PROPERTIES
656000* - Condensed Matter Physics
360103 - Metals & Alloys- Mechanical Properties