Search Results - "BLESSING, G. V"

Instrumented indentation and ultrasonic velocity techniques for the evaluation of creep cavitation in silicon nitride by LOFAJ, F, SMITH, D. T, BLESSING, G. V, LUECKE, W. E, WIEDERHORN, S. M

“…Instrumented indentation and ultrasonic wave velocity techniques combined with precise density change measurements and transmission electron microscopy (TEM)…”
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The design, construction and application of a large aperture lens-less line-focus PVDF transducer by Xiang, D., Hsu, N.N., Blessing, G.V.

“…A large aperture lens-less line-focus transducer for materials characterization is described. The transducer design is based on a time-domain Green's function…”
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Acoustic emission monitoring of high speed grinding of silicon nitride by Hwang, T.W., Whitenton, E.P., Hsu, N.N., Blessing, G.V., Evans, C.J.

“…Acoustic emission (AE) monitoring of a machining process offers real-time sensory input which could provide tool condition and part quality information that is…”
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Imaging of acoustic surface wave slowness by Xiang, D., Hsu, N. N., Blessing, G. V.

“…An experimental method has been devised for imaging the acoustic surface wave slowness (inverse of the phase velocity) in anisotropic solids. This technique…”
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Statistical error analysis of time and polarization resolved ultrasonic measurements by Xiang, D., Hsu, N.N., Blessing, G.V.

“…The time and polarization resolved ultrasonic technique which we previously developed has been demonstrated to simultaneously provide measurements of the wave…”
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Ultrasonics research in the NIST Manufacturing Engineering Laboratory by Blessing, G.V., Hsu, N.N., Slotwinski, J.A., Xiang, D.

“…The Ultrasonic Standards Group in the Manufacturing Engineering Laboratory of the National Institute of Standards and Technology (NIST) performs research,…”
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Ultrasonic Velocity Technique for Nondestructive Quantification of Elastic Moduli Degradation during Creep in Silicon Nitride by Lofaj, František, Blessing, Gerald V., Wiederhorn, Sheldon M.

“…The ultrasonic velocity technique was used for nondestructive quantification of creep damage during interrupted tensile creep tests at 1400°C in an advanced…”
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Ultrasonic-shear-wave measurement of known residual stress in aluminum by Blessing, G V, Hsu, N N, Proctor, T M

“…Ultrasonic-shear-wave time-of-flight measurements were made at a nominal frequency of 4 MHz on both stressed and nonstressed sample disks of 2024 Al alloy. The…”
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Detection of contact damage in ceramics by an ultrasonic method by Ahn, Hyo Sok, Jahanmir, Said, Slotwinski, John A., Blessing, Gerald V.

“…A pulse-echo ultrasonic technique consisting of focused normal-incident compressional waves was used for the detection and evaluation of surface and subsurface…”
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Ultrasonic Measurement of Sheet Anisotrophy and Formability by Clark, A. V., Thompson, R. B., Reno, R. C., Blessing, G. V., Matlock, D.

“…The anisotropy of Young's modulus in steel sheet is closely related to the r-value. Commercially available instrumentation is often used to predict formability…”
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Time-resolved ultrasonic body wave measurements of material anisotropy using a lensless line-focus transducer by Hsu, N.N., Xiang, D., Blessing, G.V.

“…For plate-like sample geometries, a line-focus transducer can be used to detect back-reflected echoes through the thickness of the sample. The interaction of…”
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Time and polarization resolved ultrasonic measurements using a lensless line-focus transducer by Hsu, N.N., Xiang, D., Fick, S.E., Blessing, G.V.

“…We have developed a transducer which allows the benefits of Line-Focus Beam (LFB) acoustic microscopy to be realized over large areas, using a conventional…”
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Niobium Fermi surface and the magnetoacoustic interaction: Polarization selectivity by Leibowitz, J. R., Blessing, G. V., Alexander, E. M.

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Elastic properties of Tb0.3Dy0.7Fe2 measured ultrasonically by Blessing, G. V., Clark, A. E.

“…Ultrasonic velocity and absorption measurements have been made as a function of magnetic field in both single crystal and polycrystalline Tb0.3Dy0.7Fe2. This…”
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Extraordinary magnetoelastic coupling measured ultrasonically in Tb0.3Dy0.7Fe2 by Rinaldi, S., Blessing, G. V., Cullen, J. R.

“…We measured the magnetic field dependence of the transverse acoustic velocities in single crystal Tb0.3Dy0.7Fe2, a highly magnetostrictive material with low…”
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Green's function of a liquid/solid interface and application to fluid coupled ultrasonic materials testing by Hsu, N.N., Fick, S.E., Blessing, G.V.

“…Computer algorithms for the dynamic Green's functions have been derived. They can be used to determine the response of ultrasonic receivers to the ultrasonic…”
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Ultrasonic Elasticity Study of Sintered Ceramics and Their Green States by Jones, M.P., Blessing, G.V., Robbins, C.R.

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The Effect of Surface Roughness on Ultrasonic Echo Amplitude in Steel by Blessing, G.V., Bagley, P.P., James, J.E.

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Surface micrometrology using ultrasound by Blessing, G.V., Eitzen, D.G., Ryan, H.M., Slotwinski, J.A.

“…The development of ultrasonic scattering and reflection techniques for the online measurement of machined part surface features is described. A range of…”
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