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Title: Single crystal metal wedges for surface acoustic wave propagation

Abstract

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.

Inventors:
Issue Date:
OSTI Identifier:
6826743
Assignee:
Dept. of Energy TIC; ERA-06-017232; EDB-81-051934
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; ULTRASONIC TESTING; EQUIPMENT; DESIGN; OPERATION; RAYLEIGH WAVES; SONIC PROBES; ACOUSTIC TESTING; MATERIALS TESTING; NONDESTRUCTIVE TESTING; PROBES; SEISMIC SURFACE WAVES; SEISMIC WAVES; TESTING 420500* -- Engineering-- Materials Testing

Citation Formats

Fisher, E.S. Single crystal metal wedges for surface acoustic wave propagation. United States: N. p., 1980. Web.
Fisher, E.S. Single crystal metal wedges for surface acoustic wave propagation. United States.
Fisher, E.S. Fri . "Single crystal metal wedges for surface acoustic wave propagation". United States.
@article{osti_6826743,
title = {Single crystal metal wedges for surface acoustic wave propagation},
author = {Fisher, E.S.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {5}
}