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direct-imaging methods

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Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006452
EISBN: 978-1-62708-190-0
... with radiography. This article summarizes the history of array usage in NDE and its relationship to medical applications. It discusses the mathematics behind classical beamforming, full matrix capture, and total focusing methods of imaging. The article shows how ultrasonic array data can be simulated by direct...
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 X-Ray Fluorescence Tomography Direct-Imaging Methods Computer Reconstruction and Visualization of Three-Dimensional Data Preprocessing Segmentation Algorithms Virtual Reality Isosurface Generation Ray Tracing Virtual Reality (VR) provides the ultimate...
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
... Abstract This article covers in-line process monitoring of the metal additive manufacturing (AM) methods of laser and electron beam (e-beam) powder-bed fusion (PBF) and directed-energy deposition (DED). It focuses on methods that monitor the component directly throughout the build process. This article...
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
... by rastering a focused beam of ions (typically gallium) over the surface of a sample. The interaction of the ion beam with the sample allows for direct imaging of the sample surface and also results in material removal through sputtering. Ion beam spot sizes are routinely of the order of tens of nanometers...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006660
EISBN: 978-1-62708-213-6
... contrast image produced by measuring the pattern contrast in the EBSD pattern from each pixel. (b) Ferrite inverse pole figure (IPF) horizontal direction. (c) Austenite IPF horizontal direction. (d) Austenite IPF vertical direction Fig. 15 Pole figures produced from the electron backscatter...
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
... in proportion to the intensity of the impinging radiation. The real-time image can then be viewed directly (with appropriate measures to protect the viewer from radiation) or can be monitored by low-level television camera tubes. Direct viewing of flouroscopic images is known as flouroscopy. This method...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003788
EISBN: 978-1-62708-177-1
... casting, solution annealed above the Curie temperature, cooled in a magnetic field, and aged. The particles of α (dark) in an α′ matrix have a vertical orientation, parallel to the applied field direction. As-polished. Original magnification 100,000× Fig. 15 Bitter domain images of a nickel...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001760
EISBN: 978-1-62708-178-8
... by simple ( R h ) and multiple ( R 0 ) reflection. R ′ 0 is 180° out of phase with R 0 . Fig. 5 Origin of direct (1), dynamical (2), and intermediate (3) image contrast for a dislocation. Source: Ref 8 Fig. 6 Origin of fringes caused by a fault plane between crystals I and II...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001837
EISBN: 978-1-62708-181-8
... images Primes indicate projected quantities or measurements made on projection planes. Variable Explanation Equation Part I: Individual features in the fracture surface L ϕ Length of linear feature (fixed direction ϕ in the projection plane) L ϕ = ( π 2 ) L...
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
... irradiated. This method directly digitizes the radiometric output of the detectors and generates images in near real time. Direct digitization (as opposed to digitizing the output of a TV camera or image intensifier) enhances the signal-to-noise ratio and can result in a dynamic range up to 100,000 to 1...
Series: ASM Handbook
Volume: 24
Publisher: ASM International
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