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Title: ULTRASONIC FLAW DETECTION METHOD AND MEANS

Abstract

A method of detecting subsurface flaws in an object using ultrasonic waves is described. An ultnasonic wave of predetermined velocity and frequency is transmitted to engage the surface of the object at a predetermined angle of inci dence thereto. The incident angle of the wave to the surface is determined with respect to phase velocity, incident wave velocity, incident wave frequency, and the estimated depth of the flaw so that Lamb waves of a particular type and mode are induced only in the portion of the object between the flaw and the surface. These Lamb waves are then detected as they leave the object at an angle of exit equal to the angle of incidence. No waves wlll be generated in the object and hence received if no flaw exists beneath the surface. (AEC)

Inventors:
Issue Date:
OSTI Identifier:
4021306
Patent Number(s):
2995925
Assignee:
U.S. Atomic Energy Commission
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
NSA Number:
NSA-15-025030
Resource Type:
Patent
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-61
Country of Publication:
United States
Language:
English
Subject:
ENGINEERING AND EQUIPMENT; DEFECTS; DETECTION; FREQUENCY; LAMB WAVES; LENSES; MATERIALS TESTING; PERFORMANCE; PLATES; SPECTRAL SHIFT; SURFACES; ULTRASONICS; VELOCITY; VIBRATIONS

Citation Formats

Worlton, D C. ULTRASONIC FLAW DETECTION METHOD AND MEANS. United States: N. p., 1961. Web.
Worlton, D C. ULTRASONIC FLAW DETECTION METHOD AND MEANS. United States.
Worlton, D C. Tue . "ULTRASONIC FLAW DETECTION METHOD AND MEANS". United States.
@article{osti_4021306,
title = {ULTRASONIC FLAW DETECTION METHOD AND MEANS},
author = {Worlton, D C},
abstractNote = {A method of detecting subsurface flaws in an object using ultrasonic waves is described. An ultnasonic wave of predetermined velocity and frequency is transmitted to engage the surface of the object at a predetermined angle of inci dence thereto. The incident angle of the wave to the surface is determined with respect to phase velocity, incident wave velocity, incident wave frequency, and the estimated depth of the flaw so that Lamb waves of a particular type and mode are induced only in the portion of the object between the flaw and the surface. These Lamb waves are then detected as they leave the object at an angle of exit equal to the angle of incidence. No waves wlll be generated in the object and hence received if no flaw exists beneath the surface. (AEC)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1961},
month = {8}
}