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high-frequency mechanical waves

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110067
EISBN: 978-1-62708-247-1
... Contrast Mechanisms in Acoustic Imaging Focusing of Acoustic Waves Plastic Package Inspection Inspection of Packages Having High Velocity Substrates Strategies for Inspection of Packages Having Thin Layers Imaging Flip Chip Devices SAM is one of three complementary techniques used...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720267
EISBN: 978-1-62708-305-8
... be examined by a low frequency beam of about 0.5 MHz and a large transducer diameter about 50 mm (2 in.), which provides a high penetration, but a relatively low lateral resolution of about 6 mm (1/4 in.). Improved resolution can be obtained by using shear waves, because these have shorter wavelengths than...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870333
EISBN: 978-1-62708-314-0
... it is frequently used during visual inspection. In tap testing, a heavy coin, washer, or small hammer is used to lightly tap the surface. If a good region is tapped, the reflected sound will contain more high-frequency vibrations and produce a ringing sound, while if a bad region such as, an unbond is tapped...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110209
EISBN: 978-1-62708-247-1
... of the cavity is assigned an energy, ε ¯ = kT , we end up with the Raleigh-Jeans formula for blackbody radiation, R T (ν)   dν = (8πν 2 kT/c 2 )   dν This formula proved to be accurate at low frequencies, but failed miserably at high frequencies in the ultraviolet end...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110219
EISBN: 978-1-62708-247-1
... to the excitation function, resulting in signals with sufficiently high signal-to-noise ratio (SNR). In classical measurements, the time sequence is correlated to a sine- and a cosine signal of the lock-in frequency which are synchronized to the excitation signal. These correlation functions are then integrated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720321
EISBN: 978-1-62708-305-8
... with high-frequency (about 1 to 25 MHz) sound waves and can successfully detect internal flaws in steel bars. Most often, the ultrasonic inspection of steel bars is restricted to large diameter bars and to applications where high integrity is specified. Also, because of the limitations of ultrasonic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500301
EISBN: 978-1-62708-317-1
... of a photosensor for monitoring part ejection. Source: Ref 15.16 Ultrasonic sensors operate by emitting and receiving high-frequency sound waves. The frequency is usually on the order of 200 kHz, which is beyond the audible range of the human ear. When an object to be detected comes into the path...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110025
EISBN: 978-1-62708-247-1
... to avoid the generation of electrical shorts and corrosion. The second limitation of this technique is the compromise of spatial imaging resolution and total sample thickness. The resolution of SAM is best with high frequencies while the maximum travel range is better at low frequencies as the wave...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
... on Creep-Fatigue Interaction , ASME MPC-3, American Society of Mechanical Engineers (New York) , 1976 , p 349 – 363 8.32 Udoguchi T. Asada Y. and Ichino I. , A Frequency Interpretation of Hold-Time Experiments on High-Temperature Low-Cycle Fatigue of Steels for LMFBR , Proc...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290165
EISBN: 978-1-62708-306-5
... be soldered or brazed together. Intricate assemblies can be produced with low distortion, high fatigue resistance, and good resistance to thermal shock. Joints tend to be strong if well filled, unless embrittling phases are produced by reaction between the filler metal and the components. Soldered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240303
EISBN: 978-1-62708-251-8
... radio waves through infrared, the visible, and into approximately the middle of the ultraviolet radiation. However, metals are transparent to high-frequency x- and γ-ray radiation. Most of the absorbed radiation is re-emitted from the surface in the form of visible light of the same wavelength, which...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500227
EISBN: 978-1-62708-317-1
... processes, including high-velocity hydroforming, high-velocity mechanical forming, and electromagnetic or energy-based forming. electromagnetic forming forming equipment high-velocity hydroforming high-velocity mechanical forming HIGH-VELOCITY FORMING (also called impulse forming, high-energy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.tb.cub.t66910475
EISBN: 978-1-62708-250-1
... 1000 s −1 ) high-frequency wave (typically 5 to 10 MHz), normal to surface Thickness (i.e., corrosion loss or wastage) of material up to 250 mm Very high sensitivity (e.g., down to 0.01 mm resolution). Interpretation relatively easy. Highly portable equipment available, suitable for on-site...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050025
EISBN: 978-1-62708-311-9
... output at resonant frequency. S.P.: set point; LF: low frequency; HF: high frequency. Source: Ref 3 Fig. 3.17 Simple temperature control system. IR: infrared. Source: Ref 4 Fig. 3.16 Monitoring parameters for signature concept. Source: Ref 3 Fig. 3.11 Manufacturer’s...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2019
DOI: 10.31399/asm.tb.mfadr7.t91110244
EISBN: 978-1-62708-247-1
... capabilities and ease-of-use. Examples of which include enhanced detector arrangements (e.g. integrated high- and low-frequency modules), resolution improvements (both spatial and temporal), and user-friendly software environments. This has provided a vehicle for the FA analyst to efficiently and accurately...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270019
EISBN: 978-1-62708-301-0
... is detected. By scanning the entire surface, the position of the flaws such as notches and cracks is determined. The technique has been adopted to detect surface flaws in aircraft engine components. High-frequency ultrasound in the GHz range is passed through the component of interest. The transmitted...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2017
DOI: 10.31399/asm.tb.sccmpe2.t55090359
EISBN: 978-1-62708-266-2
... characteristics of the reflected wave form was of prime concern. The small size and tightness of the cracks in the BWR piping suggested that they could best be detected using relatively high frequencies. However, investigation proved otherwise. Frequency spectrum analysis of the reflected ultrasonic pulse...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270045
EISBN: 978-1-62708-301-0
... R. , Some Metallurgical Aspects of the Dynamic Expansion of Shells , Shock Waves and High-Strain-Rate Phenomena in Metals—Concepts and Applications , Meyers M.A. and Murr L.E. , Ed., Plenum Press , New York and London , 1980 , p 113 10.1007/978-1-4613-3219-0_8 10...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2000
DOI: 10.31399/asm.tb.fec.t65940233
EISBN: 978-1-62708-302-7
... format in the EIS method ( Fig. 6.19 ) and assuming the simplest equivalent electrical-circuit model of Fig. 6.18 , prove that the data points will fit on a semicircle, that the Z′ value at the –Z″ = 0 high-frequency intersection corresponds to R S , that the Z′ value at the –Z″ = 0 low-frequency...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2015
DOI: 10.31399/asm.tb.cpi2.t55030360
EISBN: 978-1-62708-282-2
... must have a high probability of detection for the type and size of the defect expected and be suitable for the material and geometry of the component under test. The coverage of the inspection (for example, the amount of a weld or vessel shell to be inspected) should be chosen to give the required...