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transmission tomography

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Published: 01 August 2018
Fig. 5 Components of a computed tomography (CT) image. (a) The x-ray transmission measurements and resultant CT image correspond to a defined slice through the object. (b) The cross-sectional slice can be considered to contain a matrix of volume elements, or voxels. (c) The reconstructed CT More
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
... of performance characteristics for film radiography, real-time radiography, and X-ray computed tomography is presented in a table. A functional block diagram of a typical computed tomography system is provided. The article discusses CT scanning geometry that is used to acquire the necessary transmission data...
Image
Published: 01 June 2016
tomography; TEM, transmission electron microscopy; NMR, nuclear magnetic resonance; SAXS, small-angle x-ray scattering. For further explanation, see Ref 125 , 128 , 139 , 156 . More
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003760
EISBN: 978-1-62708-177-1
... tomography phase contrast imaging serial sectioning three-dimensional microscopy transmission tomography X-ray fluorescence tomography X-ray microtomography THREE-DIMENSIONAL MICROSCOPY can be used to reveal the shape, distribution, and connectivity of three-dimensional (3D) features that lie...
Image
Published: 15 June 2020
Fig. 8 Oxide dispersion. (a) Scanning transmission electron micrographs and oxygen energy-dispersive spectroscopy maps of a bonded interface adjacent to a void showing the presence of an ~500 nm oxide dispersion. Source: Ref 42 . (b) Atom probe tomography reconstructions showing the interface More
Image
Published: 01 June 2016
Fig. 16 θ′ precipitates in Al-4Cu alloy. (a) Bright-field transmission electron microscopy image after artificial aging for 1 h at 190 °C (375 °F). The alloy contained 0.01 wt% Sn, which forms the spherical nucleation sites marked by arrows ( Ref 146 ). (b) Atom probe tomography of a volume 78 More
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005218
EISBN: 978-1-62708-187-0
... exclusive novelty offered with modern synchrotron facilities. Radiography and topography experiments provide two-dimensional transmission projected images of the sample. In a tomography experiment, a sequence of two-dimensional radiograms are collected while the sample is pivoted by a few hundred increments...
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
..., 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 applicability...
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 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, electromagnetic...
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: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
...-transmission two sides or reflection mode single side. Good sensitivity in acoustically clear material All metals and alloys, sintered carbides, glass and ceramics, rubber, structural plastics, concrete Electromagnetic testing Measures impedance of coil close to conductive material. Coil impedance changes...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006763
EISBN: 978-1-62708-295-2
.... Nondestructive inspection may be required to document cracks present in a component. Computed tomography radiography may be required to fully characterize a failed component. Component failure simulation testing, if performed, should be photographically documented in a manner similar to the documentation...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006822
EISBN: 978-1-62708-329-4
... Abstract This article discusses the failure analysis of several steel transmission pipeline failures, describes the causes and characteristics of specific pipeline failure modes, and introduces pipeline failure prevention and integrity management practices and methodologies. In addition...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
Published: 15 June 2020
DOI: 10.31399/asm.hb.v24.a0006564
EISBN: 978-1-62708-290-7
... of Laser PBF Using Optical Tomography” in this article, with a CMOS detector array and frame rate of 100 fps. A long pass filter was installed to limit transmission to wavelengths greater than 0.85 μm. A neutral density filter was needed to further reduce the radiation intensity and allow measurement...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006445
EISBN: 978-1-62708-190-0
... and sintered PM parts: density variations, compaction and ejection cracks, microlaminations, poor degree of sintering, and voids from prior lubricant agglomerates. It describes the various methods applicable to green compacts: direct-current resistivity testing, radiographic techniques, computed tomography...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0006515
EISBN: 978-1-62708-200-6
...' ai ion activity Evaluation of Structures Association A ampere CAS chemical abstract system DCP direct current plasma A area; ratio of the alternating stress CAT computer-aided tomography DDA dynamic dielectric analysis CBN cubic boron nitride DDS diamino-diphenyl sulfone amplitude to the mean stress...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005504
EISBN: 978-1-62708-197-9
... microscopy, and transmission electron microscopy tomography) and methods that examine very large volumes with much coarser resolution (such as mechanical serial sectioning coupled to optical microscopy, and x-ray tomography). The FIB instruments operate by rastering a focused beam of ions (typically gallium...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0005754
EISBN: 978-1-62708-195-5
... for engines gal gallon CAT computer-aided tomography DoD Department of Defense GFRP glass- ber-reinforced plastic C-C carbon-carbon DOE Department of Energy GMT glass mat thermoplastics CDCA cyclohexane dicarboxylic anhydride DOF degrees of freedom GL/EP glass/epoxy CFCC continuous ber ceramic composite DRA...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003238
EISBN: 978-1-62708-199-3
... inspection involves viewing of a real-time image on a fluorescent screen or image-intensifier, the radiographic process is termed “real-time inspection.” When electronic, nonimaging instruments are used to measure the intensity of radiation, the process is termed “radiation gaging.” Tomography, a radiation...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006268
EISBN: 978-1-62708-169-6
... transmission electron microscopy), and atom probe tomography reveal details in increasing resolution. Integral methods yield quantities that reflect the precipitation process indirectly. The most important quantities are the mechanical ones, for example, different hardness or strength values. Thermal analysis...