Single crystal metal wedges for surface acoustic wave propagation

Patent · Tue Jan 26 04:00:00 EST 1982

OSTI ID:5550637

Fisher, E S

An ultrasonic testing device has been developed to evaluate flaws and inhomogeneities in the near-surface region of a test material. A metal single crystal wedge is used to generate high frequency rayleigh surface waves in the test material surface by conversion of a slow velocity, bulk acoustic mode in the wedge into a rayleigh wave at the metal-wedge test material interface. Particular classes of metals have been found to provide the bulk acoustic modes necessary for production of a surface wave with extremely high frequency and angular collimation. The high frequency allows flaws and inhomogeneities to be examined with greater resolution. The high degree of angular collimation for the outgoing ultrasonic beam permits precision angular location of flaws and inhomogeneities in the test material surface.

• Assignee: Department of Energy
• Patent Number(s): US 4313070
• OSTI ID: 5550637
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420500* -- Engineering-- Materials Testing
ACOUSTIC TESTING
ANGULAR CORRELATION
CORRELATIONS
DEFECTS
ELEMENTS
EQUIPMENT
FREQUENCY RANGE
MATERIALS TESTING
METALS
NONDESTRUCTIVE TESTING
RAYLEIGH WAVES
SEISMIC SURFACE WAVES
SEISMIC WAVES
SOUND WAVES
TESTING
TRANSITION ELEMENTS
ULTRASONIC TESTING
WAVELENGTHS