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ultrasonic polar scan technique

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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 THIS ARTICLE CONSIDERS the two primary methods...
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
...” in this Volume. Minimum detectable displacement for different ultrasonic transducers at 1 MHz Table 1 Minimum detectable displacement for different ultrasonic transducers at 1 MHz Technique Minimum detectable displacement, m / Hz Michelson (diffuse surface) 10 –12 Practical...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003236
EISBN: 978-1-62708-199-3
... are also addressed. The article concludes with a review of the advantages and disadvantages of ultrasonic inspection compared with other methods applications of the technique. couplants flaw detection nondestructive testing piezoelectric transducer elements pulse-echo method transmission method...
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
... to the technique. Many applications that have been the object of laboratory experimentation, as well as those that have been demonstrated in industrial plants with prototype systems, also are described. As an overall conclusion, the field of laser-ultrasonics, which was for a long time a laboratory curiosity, has...
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.a0006478
EISBN: 978-1-62708-190-0
... fibers, and therefore, the technique can be highly sensitive to the fiber orientation in the structure. This feature can be used as a means of characterization of the structure ( Ref 6 ). However, for the general inspection of fiber-reinforced composites, the most common inspection is with ultrasonic...
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
... fibers, and therefore, the technique can be highly sensitive to the fiber orientation in the structure. This feature can be used as a means of characterization of the structure ( Ref 6 ). However, for the general inspection of fiber-reinforced composites, the most common inspection is with ultrasonic...
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.a0006457
EISBN: 978-1-62708-190-0
... Voids and porosity are detectable by low-kilovoltage (15 to 50 kV) x-ray techniques using a beryllium-window x-ray tube, by thermal neutron radiography, and by ultrasonic C-scan techniques employing small-diameter or focused search units operating at 5 to 10 MHz. If the flaw is the result...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003460
EISBN: 978-1-62708-195-5
... Analysis Procedures,” gives a general overview of the investigative sequence, as well as many of the specific techniques that can be used in an investigation. These techniques include both nondestructive techniques, such as x-ray and ultrasonics, and destructive techniques, such as cross-sectioning...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006466
EISBN: 978-1-62708-190-0
... polarity detector to produce high-resolution C-scan images. CRT, cathode ray tube With regard to the depth zone within a sample that is accessible by C-SAM techniques, it is well known that the large echo from a liquid/solid interface (the top surface of the sample) masks the small echoes that may...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
... using polarized light, scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive analysis of x-rays (EDAX), and wavelength dispersive analysis of x-rays (WDS). The quality of preparation of the ceramics samples for these techniques is the determining factor...
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
... microwave, ultrasonic, and acoustic techniques are finding much greater applications for monitoring hidden corrosion and cracks. For instance, a microwave corrosion detector (MCD) can scan and locate corrosion underneath paint using microwave sources and analyzing the reflected wave to determine...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003659
EISBN: 978-1-62708-182-5
... of corrosion testing. corrosion-monitoring method electrical-resistance probe side-stream loop electrochemical noise hydrogen-probe corrosion rate ultrasonic thickness polarization-resistance corrosion potential alternating current data analysis IN-SERVICE MONITORING of industrial...
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
... the microwave beam is directed perpendicularly into the surface. To detect a perpendicular planar discontinuity, such as an internal crack or seam, the microwave beam can be introduced into the material at an oblique angle, similar to ultrasonic shear-wave inspection of welds. When oblique incidence techniques...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002363
EISBN: 978-1-62708-193-1
... emission techniques, ultrasonic methods, eddy current techniques, infrared techniques, exoelectron methods, and gamma radiography. The article explains the microscopy methods used to determine fatigue crack initiation and propagation. These include electron microscopy, scanning tunneling microscopy, atomic...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003235
EISBN: 978-1-62708-199-3
... metallic coatings on dielectric substrates Detection of voids, delaminatrons, macroporosity, inclusions, and other flaws in plastic or ceramic materials. Advantages In comparison with ultrasonic inspection and x-ray radiographic inspection, the advantages of inspection with microwaves...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006096
EISBN: 978-1-62708-175-7
... Electron microscopy 0.01–10 4×10 −4 to 0.4 Stream scanning Resistivity 0.05–500 2×10 −3 to 20 Dynamic/Stokes Optical 1–500 0.04 to 20 Ultrasonic attenuation 100–1000 4 to 40 Column hydrodynamic chromatography 0.1–1.0 4×10 −3 to 0.04 Sedimentation field-flow fractionation...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001469
EISBN: 978-1-62708-173-3
... method. The techniques are hot-tool, hot-gas, extrusion, focused infrared, laser, friction, vibration, spin, ultrasonic, and electromagnetic welding techniques (resistance, induction, dielectric, and microwave welding). The article concludes with a discussion on welding evaluation methods...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003754
EISBN: 978-1-62708-177-1
... discusses the examination of specimen surfaces using polarized light, phase contrast, oblique illumination, dark-field illumination, bright-field illumination, interference-contrast illumination, and phase contrast illumination. Special techniques and devices that may be used with the optical microscope...