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guided wave technique

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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003658
EISBN: 978-1-62708-182-5
... Abstract Microwave and guided wave (GW) nondestructive evaluation (NDE) techniques are capable of detecting corrosion damage, cracks, and other defect types in inaccessible areas. This article describes the operation principles of the techniques and provides information on hidden corrosion...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006441
EISBN: 978-1-62708-190-0
.... For these reasons, the majority of national standards and company procedures for inspection using guided waves have chosen to identify it as an NDE method rather than a technique within the UT method. Critically, this ensures that inspectors develop the specialist skills and qualifications that are specific...
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
... to applications where PETs require delay lines or phase-matching wedges ( Ref 5 , 28 ). It is quite likely that there are many situations, such as generating guided and surface waves under industrial conditions, where the signal-to-noise ratio that can be achieved in an EMAT-based UNDE system could exceed...
Book Chapter

By Paul T. Vianco
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001401
EISBN: 978-1-62708-173-3
... SOLDERING is one of the primary techniques for mass assembly of printed wiring boards involving through holes, surface mount devices, or a combination of these two technologies. A schematic of the wave soldering process is shown in Fig. 1 . A solder “fountain” or “wave” is created by a pump located...
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 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. It reviews...
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
... with horns for high power and for a range of specialized nondestructive testing (NDT) applications. Magnetostriction is used for lower frequencies; a common application now is guided wave generation ( Ref 6 ). In looking more widely at options for ultrasound generation that generally are considered...
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
... (Rayleigh) wave and ultrasonic polar scan techniques. electronic equipment pulse-echo method single-element transducer-based system surface wave technique transducers transmission method ultrasonic inspection ultrasonic polar scan technique The display screen in Fig. 11 illustrates...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006473
EISBN: 978-1-62708-190-0
.... It reviews the determination of area-amplitude and distance-amplitude curves of a straight-beam pulse-echo ultrasonic inspection system. The article discusses the three principal conventional manual ultrasonic sizing techniques: 6 dB drop technique, maximum-amplitude technique, and 20 dB drop technique...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006472
EISBN: 978-1-62708-190-0
... Abstract Time-of-flight diffraction (TOFD) is an ultrasonic technique used to detect diffracted waves from crack tips and to size the cracks from the arrival times of those waves. This article discusses the basic considerations and provides information on probe selection, gain setting...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006438
EISBN: 978-1-62708-190-0
.... Guided wave ultrasound using piezoelectric, EMAT, or magnetostrictive sensors. This is a growing inspection approach because of advancement of techniques for focusing, steering, temperature, and dispersion curve compensation, and other advances that are leading to increased confidence in this technology...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003638
EISBN: 978-1-62708-182-5
..., such as ultrasonic thickness measurements, work from the outside of the vessel. Emerging techniques, such as microwave and guided wave ultrasonic methods can be configured to detect corrosion under coatings or to measure the moisture content of the interior of structures. Infrared imaging is typically used to detect...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003653
EISBN: 978-1-62708-182-5
... Integrated on-line monitor The most promising newer techniques are detailed in subsequent articles in this Handbook. In general, these techniques fall into such categories as electrochemical methods, electromagnetic or sound wave methods, and fiber-optic technology, along with visible, ultraviolet...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006446
EISBN: 978-1-62708-190-0
... Abstract Nonlinear ultrasonic nondestructive examination (NDE) techniques are based on nonlinear interaction of ultrasonic waves with the material to be characterized and defects to be detected. This article introduces the basic principles of nonlinear material-wave interaction, the origin...
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
... to large parts, such as those with thicknesses of more than a meter, and in the axial inspection of parts such as long steel shafts or rotor forgings to ranges/thicknesses of 6 m (20 ft) and more, particularly when using guided waves. A diverse range of systems has now been developed, and these make...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006936
EISBN: 978-1-62708-395-9
.... , and Peters K. , Optical Fiber Sensors for Ultrasonic Structural Health Monitoring: A Review , Sensors , Vol 21 (No. 7345 ), 2021 , p 1 – 34 10.3390/s21217345 33. Gresil M. and Giurgiutiu V. , Prediction of attenuated guided waves propagation in carbon fiber composites using...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003298
EISBN: 978-1-62708-176-4
... a compromise: Good wave guide properties: Good wave guide properties: Very low attenuation. Signal loss in perfectly elastic materials is essentially zeroed. Little or no time-dependent response, including frequency dependence, anelasticity, and dispersion Little radial wave attenuation. A low...
Series: ASM Handbook
Volume: 13C
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v13c.a0004215
EISBN: 978-1-62708-184-9
... the data acquisition, reporting and trending, and review and audit for the inspection. It reviews inspection techniques, including visual inspection, ultrasonic inspection, and radiographic inspection. radiographic inspection invasive inspection pressure vessels risk-based inspection ultrasonic...
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
... the edge to significantly reduce this edge effect. Figure 9(d) shows both a single-sided guided-wave technique and alternate two-sided configuration, with the second transducer on the opposite side. The single-sided pitch-catch technique is best for inspecting skins and skin-to-core bonds in sandwich...
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
... the quality of the inspection at those edges. Low-density foam can be taped along the edge to significantly reduce this edge effect. Figure 9(d) shows both a single- sided guided-wave technique and alternate two- sided configuration, with the second transducer on the opposite side. The single-sided pitch...
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