Topic
Time-of-flight diffraction ultrasonics
About: Time-of-flight diffraction ultrasonics is a research topic. Over the lifetime, 544 publications have been published within this topic receiving 3189 citations.
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01 Jun 1995
2 citations
01 Jan 2016
TL;DR: In this article, the authors discussed the ultrasonic NDE method with the help of principles and theory of sound-wave and its propagation through materials, including the concept of piezoelectricity, sound beam velocity, frequency, and reflection and refraction through Snell's law.
Abstract: The Ultrasonic NDE method is discussed with the help of principles and theory of sound-wave and its propagation through materials.
The chapter explains the concept of piezoelectricity, sound beam velocity, frequency, and reflection and refraction through Snell's law. The selection of ultrasonic test equipment calibration and testing procedure is included. The automatic testing is added to explain the principles of AUT.
2 citations
Patent•
19 Feb 2004
TL;DR: In this paper, a probe for an ultrasonic TOFD method capable of measuring easily and accurately a flaw end part depth in a curved surface of a specimen, and a flaw detection method using the probe was provided.
Abstract: PROBLEM TO BE SOLVED: To provide a probe for an ultrasonic TOFD method capable of measuring easily and accurately a flaw end part depth in a curved surface of a specimen, and a flaw detection method using the probe. SOLUTION: This probe 1 for the ultrasonic TOFD method comprises an ultrasonic wave generating element 11, an ultrasonic wave receiving element 12, and a holder 13 for equipping the ultrasonic wave generating element and the ultrasonic wave receiving element. A contact surface 131 contacting with the curved surface of a specimen 2 is formed into a shape along with the curve surface of the specimen 2. A flaw detection test is carried out in the specimen of which the flaw end part depth is known, using the probe 1 for the ultrasonic TOFD method, an interelement distance is corrected to make a calculated flaw end part depth nearest to an observed flaw end part depth. The flaw detection test is carried out thereafter in the specimen of which the flaw end part depth is unknown, so as to calculate the flaw end part depth using the corrected interelement distance. COPYRIGHT: (C)2004,JPO
2 citations
01 Jan 2004
TL;DR: In this paper, the authors describe a number of automated ultrasonic testing (AUT) systems that fulfill the ASME CC 2235 code case, which permits a variety of inspection techniques based on pulse-echo and Time-Of-Flight Diffraction (TOFD), provided a Performance Demonstration is achieved.
Abstract: ASME Code Case 2235 now permits automated ultrasonic testing (AUT) instead of radiography for vessels 0.5” (12.7 mm) or greater. Ultrasonic testing has significant advantages over radiography: no safety hazard so no disruption of production; inspection as soon as component cools; rapid feedback; defect vertical sizing for Fitness-For-Purpose applications; tailored inspections. ASME CC 2235 permits a variety of inspection techniques based on pulse-echo and Time-Of-Flight Diffraction (TOFD), provided a Performance Demonstration is achieved. This paper describes a number of AUT systems which fulfill the ASME code case. These AUT systems range from a portable phased array system (Omniscan) for low cost and convenience, through conventional systems based on TOFD (μ-Tomoscan), general phased array systems (Tomoscan III) to premium systems with multiple NDE approaches. With such a variety of technologies and costs, AUT systems can be tailored to the client’s needs.Copyright © 2004 by ASME
2 citations
2 citations