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ultrasonic transducers

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Image
Published: 01 December 1998
Fig. 3 Oscilloscope displays using ultrasonic transducers of (a) high and low penetration (ability to detect defects at distances within the solid), and (b) high and low resolution (ability to separate echoes from closely-spaced defects) More
Image
Published: 01 August 2018
Fig. 9 Wedge-based ultrasonic transducers. (a) Illustration of wave mode conversion to generate shear waves. (b) Examples of angle beam transducers. Courtesy of Iowa State University Center for Nondestructive Evaluation More
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006471
EISBN: 978-1-62708-190-0
...Abstract Abstract This article discusses the advantages, disadvantages, applications, and selection criteria of various technologies and transduction modalities that can generate and detect ultrasonic waves. These include piezoelectric transducers, electromagnetic acoustic transducers (EMATs...
Image
Published: 01 August 2018
Fig. 1 (a) The principle of laser-ultrasonics or of a “laser-ultrasonic transducer” compared to (b) conventional piezoelectric-based ultrasonics More
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003236
EISBN: 978-1-62708-199-3
... a detailed account of ultrasonic flaw detectors, including ultrasonic transducers and types of search units and couplants. The article describes pulse-echo and transmission inspection methods and data interpretation. The general characteristics of ultrasonic waves and the factors influencing ultrasonic...
Image
Published: 01 January 1993
Fig. 9 Planet gear carrier assembly (a) showing the four welds in one stack that connect the three decks. The top and top-center welds are tested by the top ultrasonic transducer, and the bottom and bottom-center welds are inspected by the bottom transducer. (b) Close-up of upper transducer More
Image
Published: 01 August 2018
Fig. 18 Illustration of differences in response between (a) an unfocused and (b) a focused ultrasonic transducer. Adapted from Ref 27 More
Image
Published: 01 August 2018
Fig. 19 Smart pipeline inspection gage devices enable internal inspection of in-service line pipe. Such devices can be equipped with odometers, calipers, tilt sensors, magnetic sensors, and ultrasonic transducers to capture information about the condition of the pipe without removing it from More
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001226
EISBN: 978-1-62708-170-2
... and the equipment in ultrasonic cleaning. The components used in the generation of ultrasonic wave include piezoelectric and magnetostrictive transducers that are used in ultrasonic generators and tanks. The effects of solution type and its temperature on the effectiveness of ultrasonic cleaning are also discussed...
Book Chapter

Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006474
EISBN: 978-1-62708-190-0
... ultrasonic transducer (in some cases more than 20 cm, or 8 in., in diameter) to generate plane waves, which provide the ultrasonic illumination, and then uses liquid-surface holography, through the interaction with a beam from a reference transducer, to convert the sonic image into a wave pattern...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003240
EISBN: 978-1-62708-199-3
..., except for the method of read out. In liquid-surface systems, two separate ultrasonic transducers supply the object beam and reference beam, which are usually pulsed. The two transducers and the test object are immersed in a water-filled tank. The test object is positioned in the object plane...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006461
EISBN: 978-1-62708-190-0
...Abstract Abstract This article provides an overview of the characteristics of Rayleigh waves plus methods for generation and detection of waves, including using piezoelectric transducers or noncontact techniques such as lasers, electromagnetic acoustic transducers, or air-coupled ultrasonics...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006470
EISBN: 978-1-62708-190-0
...Abstract Abstract Ultrasonic inspection is a family of nondestructive methods in which beams of high-frequency mechanical waves are introduced into materials, using transducers, for the detection and characterization of both surface and subsurface anomalies and flaws in the material...
Image
Published: 01 August 2018
Fig. 44 Circumferential ultrasonic C-scan using 5 MHz transducer from the circumference of a 6090/SiC/25p billet More
Image
Published: 01 August 2018
Fig. 45 Axial ultrasonic C-scan using 5 MHz transducer from the top of a 6090/SiC/25p billet More
Image
Published: 01 August 2018
Fig. 2 Examples of portable ultrasonic units (a) with transducer for pulse-echo measurement and (b) with phased array. Reprinted with permission from Olympus Corporation. (c) system for testing round bars: ROWA B-130 (left), ROWA B-260 (right). Courtesy of Timken More
Image
Published: 01 August 2018
Fig. 1 Principles of ultrasonic pulse-echo testing. (a) Transducer on a plate. (b) Transducer on a plate with a small defect. (c) Transducer on a plate containing a large defect. Adapted from Ref 2 More
Image
Published: 01 August 2018
Fig. 17 Example of manual ultrasonic inspection using a pulse-echo transducer More
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006458
EISBN: 978-1-62708-190-0
...Abstract Abstract This article describes the basic features of electromagnetic acoustic transducers (EMATs) and discusses their existing and some potential uses within the field of ultrasonic nondestructive evaluation (UNDE). It provides sufficient basic and practical information to make...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006469
EISBN: 978-1-62708-190-0
...Abstract Abstract This article considers the two primary methods used for ultrasonic inspection: pulse-echo and the transmission methods. Pulse-echo inspection can be accomplished with longitudinal, shear, surface (Rayleigh), or Lamb (plate) waves using a diverse range of transducers...