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Title: Laser-ultrasound spectroscopy apparatus and method with detection of shear resonances for measuring anisotropy, thickness, and other properties

Patent ·
OSTI ID:872983
 [1];  [2];  [3];  [3];  [4];  [5];  [3]
  1. Terrebonne, CA
  2. St-Bruno-de-Montarville, CA
  3. Montreal, CA
  4. St-Bruno, CA
  5. Beloeil, CA
+ Show Author Affiliations

Apparatus and method for detecting shear resonances includes structure and steps for applying a radiation pulse from a pulsed source of radiation to an object to generate elastic waves therein, optically detecting the elastic waves generated in the object, and analyzing the elastic waves optically detected in the object. These shear resonances, alone or in combination with other information, may be used in the present invention to improve thickness measurement accuracy and to determine geometrical, microstructural, and physical properties of the object. At least one shear resonance in the object is detected with the elastic waves optically detected in the object. Preferably, laser-ultrasound spectroscopy is utilized to detect the shear resonances.

Research Organization:
American Iron and Steel Institute, Washington, DC (United States)
DOE Contract Number:
FC07-93ID13205
Assignee:
American Iron and Steel Institute (Washington, DC)
Patent Number(s):
US 6057927
OSTI ID:
872983
Country of Publication:
United States
Language:
English

References (14)

Angular dependence of ultrasonic wave propagation in a stressed, orthorhombic continuum: Theory and application to the measurement of stress and texture journal September 1986
Breaking the sensitivity barrier: The challenge for laser-ultrasonics conference January 1992
High temperature pulsed photoacoustic studies of solids conference January 1990
Nondestructive characterization of texture and plastic strain ratio of metal sheets with electromagnetic acoustic transducers journal February 1990
Progress Towards the Application of Laser-Ultrasonics in Industry book January 1993
Laser generated flexural acoustic waves travelling along the tip of a wedge conference January 1993
On-line measurement of plastic strain ratio of steel sheet using resonance mode EMAT journal March 1993
Ultrasonic attenuation and grain‐size evaluation using electromagnetic acoustic resonance journal July 1995
Some windows with very good sidelobe behavior journal February 1981
Angular dependent ultrasonic wave velocities in aggregates of hexagonal crystals journal September 1986
Inversion of Pole Figures for Materials Having Cubic Crystal Symmetry journal April 1966
Development of an on-line evaluation system of formability in cold-rolled steel sheets using electromagnetic acoustic transducers (EMATs) journal June 1996
Shear-wave focusing with a laser-ultrasound phased-array journal November 1995
Laser-based ultrasonics for flaw detection conference January 1994

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Related Subjects

laser-ultrasound
spectroscopy
apparatus
method
detection
shear
resonances
measuring
anisotropy
thickness
properties
detecting
structure
steps
applying
radiation
pulse
pulsed
source
generate
elastic
waves
therein
optically
generated
analyzing
detected
combination
information
improve
measurement
accuracy
determine
geometrical
microstructural
physical
resonance
preferably
utilized
detect
waves generated
physical properties
radiation pulse
waves therein
optically detected
shear resonances
elastic wave
ultrasound spectroscopy
thickness measurement
pulsed source
shear resonance
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