1-20 of 253 Search Results for

contrast-enhancement methods

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
... on the display. In contrast to normal B- and C-scan displays (which attempt to filter out “unwanted” portions of the A-scan and display some element of the “wanted” portion at each scan point), A-scan displays sometimes are quite complex. They may contain electronic noise, ultrasonic (acoustic...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006679
EISBN: 978-1-62708-213-6
... Abstract This article describes various methods of electrochemical analysis, namely coulometry, electrogravimetry, voltammetry, electrometric titration, and nanometer electrochemistry. The discussion covers the general uses, sample requirements, application examples, advantages, and limitations...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001232
EISBN: 978-1-62708-170-2
... finish ( Table 1 ). In rough grinding processes, material removal occurs at a rapid rate, with less emphasis on surface roughness/tolerances. In contrast, high-precision methods emphasize the attainment of fine surface finish and close tolerances at the expense of material removal rates. In precision...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005431
EISBN: 978-1-62708-196-2
... assuming the displacements of the continuum to be a function of a finite number of undetermined coefficients. An example of solving for solution for these undetermined coefficients is illustrated as follows. This section also defines and contrasts two different types of elements: continuum and structural...
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
... stacked together to form a two-dimensional, cross-sectional image of the component, termed a B-scan. In contrast to a monolithic transducer, an array device comprises multiple independent transducer elements in a single package. There are three major advantages of using arrays over monolithic transducers...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
... Abstract This article describes testing and characterization methods of ceramics for chemical analysis, phase analysis, microstructural analysis, macroscopic property characterization, strength and proof testing, thermophysical property testing, and nondestructive evaluation techniques...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006670
EISBN: 978-1-62708-213-6
..., fabrication methods, sample preparation, bulk/elemental characterization methods, microstructural characterization methods, surface characterization methods, and electronic characterization methods. semiconductor characterization This article introduces various techniques commonly...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005426
EISBN: 978-1-62708-196-2
... solve internal energy or enthalpy equations, in place of Eq 3 , when calculating compressible flows. The previous equations are expressed in Eulerian form; that is, the time derivative is taken at a fixed point in space. This contrasts with the Lagrangian form, in which the time derivative is taken...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006477
EISBN: 978-1-62708-190-0
... radiography are: Digital detectors require less radiation to create an image, typically only 1 to 4% of that normally required for a fine-grained, high-contrast, high-speed film ( Ref 1 ). Image processing and computer-aided detection and diagnosis algorithms are available for image enhancement and...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006468
EISBN: 978-1-62708-190-0
... within the part. Residual magnetization is usually employed whenever practicable, because the background is minimized and contrast is therefore enhanced. Also, residual magnetization is faster and less critical than continuous magnetization. The central-conductor type of inspection is sometimes...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005351
EISBN: 978-1-62708-187-0
... Abstract In the handling of molten aluminum, it is fairly common to use filters as a part of the melting unit and in the gating and/or riser system. This article describes the methods of in-furnace and in-mold filtration, with emphasis on the filtration of molten aluminum. It discusses the...
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
... of the flaw. In contrast to normal B-scan and C-scan displays, A-scan displays can be complex. It is necessary to disregard electronic noise, spurious echoes, and extra echoes resulting from mode conversion of the initial pulse to focus attention on any flaw echoes that might be present...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005685
EISBN: 978-1-62708-198-6
... observed image. Surfaces that are reflective and perpendicular to the light rays appear bright. Alternatively, nonreflective or oblique features reflect less light and appear darker. This method produces enhanced contrast for features that have anisotropic refractive properties. Two polarizing lenses are...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005680
EISBN: 978-1-62708-198-6
... . Traditional welding supplies use alternating currents (ac) that work at a frequency of 60 Hz. Alternating current welding utputs a sinusoidal waveform that provides relatively slow heat input. In contrast, direct current (dc) power supplies use a storage cell or rectified ac supply. A key advantage of dc...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006653
EISBN: 978-1-62708-213-6
... spectra to only that of the element of interest and the associated fill gas (i.e., neon or argon). Consequently, subsequent wavelength-isolation components (monochromator or interference filter) were only required to isolate the selected resonance transition wavelength. This is contrasted with high...
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
... acoustic transducer, radiography, thermography, and low-frequency vibration methods. The article also provides information on NDE methods commonly used for metal-matrix composites. acoustic emission computed tomography digital radiography eddy-current electromagnetic acoustic transducer fiber...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006440
EISBN: 978-1-62708-190-0
... black light). This development represented a major breakthrough in the detection of surface flaws. Switzer’s work also included the development of the visible-color contrast method, which allowed for inspection under white light conditions. Although not as sensitive as fluorescent penetrant inspection...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003054
EISBN: 978-1-62708-200-6
... contrasts the advantages and disadvantages of some of the adjustable processing variables in sintering. From a sintering standpoint, a decrease in particle size is favorable, because smaller particles lead to more rapid sintering rates and higher strengths. Figure 6 illustrates such an effect by plotting...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003063
EISBN: 978-1-62708-200-6
... high melting points, low density, high modulus, and high strength. In polymer- and metal-matrix composites, the modulus ratio of the reinforcement and the matrix is generally between 10 and 100. This allows for efficient load transfer from the matrix to the fiber via a strong interface. In contrast...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001301
EISBN: 978-1-62708-170-2
... determined by the mean escape depth of photoelectrons or Auger electrons or that of the sputtered particles (SIMS, SNMS). In contrast, the lateral resolution depends mainly on instrumental capabilities, such as primary beam diameter or optical imaging facility. Fig. 2 Depth of information (depth...