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acoustical holography

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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
...Abstract Abstract Acoustical holography is the extension of holography into the ultrasonic domain. The basic systems for acoustical holography are the liquid-surface type and the scanning type. This article discusses the applications for acoustical holography, including inspection of large...
Image
Published: 01 August 2018
Fig. 3 Use of scanning acoustical holography for the examination of flaws in the butt welding of a 152 mm (6 in.) thick steel plate. (a) Transducer locations above plate surface. (b) Flaw detected with +45° shear sound wave. (c) Flaw detected with 0° longitudinal sound wave. (d) Flaw detected More
Image
Published: 01 August 2018
Fig. 43 Schematic of (a) pulse-echo acoustical holography system and (b) holographic reconstruction unit More
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
... evaluation. It also discusses the types of acoustical holography, including liquid-surface acoustical holography and scanning acoustical holography. The article concludes by comparing liquid-surface and scanning systems. acoustical holography liquid-surface acoustical holography nondestructive...
Image
Published: 01 August 2018
Fig. 8 Schematic of the basic acoustical and optical systems used in nondestructive inspection by liquid-surface acoustical holography More
Image
Published: 01 August 2018
Fig. 9 Schematic of the acoustical portion of a liquid-surface acoustical holography system that is arranged to inspect strip products. The optical portion of this system is identical to that in Fig. 8 More
Image
Published: 01 August 2018
Fig. 7 Schematic of the reflection of rays of ultrasound from a surface being contoured by scanning acoustical holography More
Image
Published: 01 August 2018
Fig. 6 Contour image of a Lincoln U.S. penny made at 50 MHz using scanning acoustical holography, with the coin slightly tilted with respect to the scanning plane More
Image
Published: 01 December 1998
Fig. 2 Diagrams of the basic system used in nondestructive inspection by scanning acoustical holography. See text for description. (a) Ultrasonic and light portions of systems. (b) Scanning and recording portions of system More
Image
Published: 01 August 2018
Fig. 5 Contour image of a spherical surface with one flat circular region (above center at right). Image was made at a frequency of 8 MHz using scanning acoustical holography. Each full fringe represents a change in elevation of 95 μm (0.00375 in.). More
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003436
EISBN: 978-1-62708-195-5
...-ultrasonics, radiography, X-ray computed tomography, thermography, low-frequency vibration methods, acoustic emission, eddy current testing, optical holography, and shearography. The article presents some examples are for fiber-reinforced polymer-matrix composites. Many of the techniques have general...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006457
EISBN: 978-1-62708-190-0
... inspections. Corrosion Corrosion can be found in all structural concepts. However, a good example of bonding excellence is the honeycomb acoustic panels for the DC-10 and 747 engine inlets. These applications are quite demanding because of the combination of sonic and ambient environment being...
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
... waves, surface waves, and lamb waves. The article reviews the major variables in ultrasonic inspection, including frequency, acoustic impedance, angle of incidence, and beam intensity. It discusses the attenuation of ultrasonic beams and provides information on the pulse-echo and transmission methods...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006478
EISBN: 978-1-62708-190-0
...Abstract Abstract This article introduces the principal methodologies and some advanced technologies that are being applied for nondestructive evaluation (NDE) of fiber-reinforced polymer-matrix composites. These include acoustic emission, ultrasonic, eddy-current, computed tomography...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006475
EISBN: 978-1-62708-190-0
... , Kluwer , The Netherlands , 2000 10.1007/978-94-015-1303-6 3. Lieberman S. , Ed., Specialized NDT Methods II (Microwave, Optical Holography and Acoustic Holography), Lesson 14 , Fundamentals of Nondestructive Testing Self-Study Course , ASM International , 2011 4. Kharkovsky...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.9781627081900
EISBN: 978-1-62708-190-0
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003228
EISBN: 978-1-62708-199-3
... Characteristics detected Advantages Limitations Example of use Ultrasonics Changes in acoustic impedance caused by cracks, nonbonds, inclusions, or interfaces Can penetrate thick materials; excellent for crack detection; can be automated Normally requires coupling to material either by contact...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006671
EISBN: 978-1-62708-213-6
..., radiographic inspection, computed tomography, magnetic spin resonance imaging, neutron radiography, thermal inspection, optical holography, and acoustic holography. As already noted, flaws and cracks in ceramics represent locations where mechanical failure initiates and therefore dictate the mechanical...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003239
EISBN: 978-1-62708-199-3
... inspection can also provide rapid, noncontact scanning of surfaces, components, or assemblies. Thermal inspection does not include those methods that use thermal excitation of a test object and a nonthermal sensing device for inspection. For example, thermally induced strain in holography...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006460
EISBN: 978-1-62708-190-0
... with electromagnetic acoustic transducers (EMATs) or air-coupled transducers. As shown in Fig. 1 , a laser-ultrasonic transducer typically has three basic elements: a generation laser, a detection laser, and an interferometer, followed by data acquisition and processing electronic hardware. These elements...