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scanning acoustical holography

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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
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...
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. 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. 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. 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: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006457
EISBN: 978-1-62708-190-0
... caused by band sawing. Improper drill speed or feed coupled with improper cooling can cause these types of defects. The burned adhesive around hole 9 in Fig. 6 is detectable by ultrasonic C-scan recording methods ( Fig. 7 ). Fig. 6 Examples of burned adhesive Fig. 7 Ultrasonic C-scan...
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.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.v17.9781627081900
EISBN: 978-1-62708-190-0
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
... the method in its various implementations suitable for data digitization, immediate interpretation, automation, rapid scanning, in-line production monitoring, and process control. Some of the coupling requirements can be overcome, in some cases, by using gas/air-coupled, laser, and electromagnetic acoustic...
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: 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...
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...
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.a0006456
EISBN: 978-1-62708-190-0
... resonance imaging, and x-ray backscatter imaging. Acoustic emission, holography, and other techniques provide indirect or bulk information on the internal structure without specifically defining the structure. Comparison of ultrasound, radiography, and x-ray computed tomography Table 1 Comparison...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.9781627082136
EISBN: 978-1-62708-213-6
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... region using acetate tape softened in acetone, dried, then carefully stripped from the fracture surface. Upon return to the laboratory, the replicas may be gold coated and examined with a scanning electron microscope (SEM). Foreign particles removed from the fracture surface also may be analyzed...