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scanning 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 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 composite...
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...
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
.../25p billet at location “G” in Fig. 45 Fig. 47 Scanning electron micrograph of section “A” of Fig. 46 showing a small area of matrix-free silicon carbide particles Acoustic emission, ultrasonic, eddy-current, and CT methods have been used extensively to evaluate defects in MMCs...
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
... 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...
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
... radiography and ultrasound, which are compared with XCT in Table 1 . Less common methods in industrial testing are nuclear tracer imaging, nuclear magnetic resonance imaging, and x-ray backscatter imaging. Acoustic emission, holography, and other techniques provide indirect or bulk information on the...
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
... holes 16 through 20 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...
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
.... For example, thermally induced strain in holography or the technique of thermal excitation with ultrasonic or acoustic methods does not constitute thermal inspection. Cholesteric liquid crystals are greaselike substances that can be blended to produce compounds having color transition ranges at...
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
... 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 properties...
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
... transducers or detection 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...