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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Metallic magnetic alloy foil preparation for development of non-destructive readout buffer memory planes using laminated layer technique
This paper presents the results of reliability life testing performed on commercial electronic devices that experienced non-destructive single-event latch-up (SEL) during heavy-ion testing.
Nondestructive medical and biologic nuclear activation analysis by computer-coupled automatic system, noting feasibility of operation
Material and processing development, magnetic storage devices, and design of memory incorporating foil storage device
Nondestructive methods for determining residual stress and fatigue damage in metals
Nondestructive readout data memory unit
Fluidic memory device with associated fluidic alpha numerical display
Nondestructive test methods for detecting and measuring stress corrosion and residual stress
Residual stress and fatigue measurements in aluminum alloys by ultrasonic shear and surface wave analysis
Nondestructive testing programmed instruction text on forging, casting, extrusion, welding, and processing discontinuities
Electromagnetic switching properties of bistable, magnetically permeable liquid bead with nondestructive memory for gas flow control
Ultrasonic measurements of stress and microwave measurements of fatigue damage in metal plates
Electronic materials nondestructive evaluation techniques, describing analytic tests for chemical, structural, electrical and optical characteristics determination
Apollo 11 lunar rock and fines primordial radionuclide abundances and concentration gradients by gamma ray spectrometry at Lunar Receiving Laboratory
Vibration response NDT for fatigue crack damage in laminated filament-reinforced epoxy composites
Electrothermal behavior of bridgewire-explosive interface is defined by pulsing electroexplosive device with a safe level of current and examining the resistance variation of bridgewire. Bridgewire provides signal which describes average wire temperature and heat sinking to the explosive and enclosure.
Advantages of the large time bandwidth product of optical processing are presented. Experiments were performed to study the feasibility of the use of optical spectral analysis for detection of flaws in structural elements excited by random noise. Photographic and electronic methods of comparison of complex spectra were developed. Limitations were explored, and suggestions for further work are offered.
High-cycle life ring-reinforced hemispherical type positive expulsion diaphragm performance was demonstrated by room temperature fluid expulsion tests of 13" diameter, 8 mil thick stainless steel configurations. A maximum of eleven (11) leak-free, fluid expulsions were achieved by a 25 deg cone angle diaphragm hoop-reinforced with .110-inch cross-sectional diameter wires. This represents a 70% improvement in diaphragm reversal cycle life compared to results previously obtained. The reversal tests confirmed analytic predictions for diaphragm cycle life increases due to increasing values of diaphragm cone angle, radius to thickness ratio and material strain to necking capacity. Practical fabrication techniques were demonstrated for forming close-tolerance, thin corrugated shells and for obtaining closely controlled reinforcing ring stiffness required to maximize diaphragm cycle life. A non-destructive inspection technique for monitoring large local shell bending strains was developed.