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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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High thermal stress salt corrosion cracking of high strength steel and titanium alloys in presence of stress concentrators
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Copper alloy is converted into a spring material that can be rolled into a compact coil which will spontaneously open to form a tube in the long direction of the strip. The copper alloy is passed through a furnace at a prescribed temperature while restraining the strip in the desired tubular configuration.
Preformed metal strip, coiled flat on a storage drum, unrolls to form a cylindrical boom. Tabs and slots on opposite sides of the strip interlock to form a continuous circular cross section. This retractable boom can be used as a spacecraft antenna, gravity gradient, or positioning device.
Gasket of a commercially available plastic material is interposed between the mating surfaces in axial joints where a hard and a soft metal are in intimate contact under stress conditions. This eliminates the fretting problem and is quicker and less expensive than the plating process.
High temperature stress corrosion of titanium and titanium alloys
Trapped particle trajectories for various mathematical models of geomagnetic field
Blunt hypervelocity projectile lift-drag ratio and impact velocity effects on target penetration and impact damage
Axially symmetric or two-dimensional electrode system with emitting surface, discussing convergence and accuracy criteria of iteration methods
Stress corrosion cracking of titanium alloy in long duration and high temperature tests, using salt coating of specimens
Magnetic field experiment data for geomagnetic tail analysis
Effect of aluminum alloy test specimen size on fracture toughness at high stress ratios
Mechanism of hot salt stress corrosion cracking of titanium base alloys
Explorer XXXIII satellite magnetometric measurements of geomagnetic tail at distances beyond lunar orbit
Fatigue crack propagation and fracture toughness characteristics of 7079 aluminum alloys in underage, peak age, and overaged conditions
Oxidation resistant alloys tested for suitability as transpiration cooled gas turbine blades
Coated tantalum alloys and refractory metal coatings for leading edge regions of hypersonic cruise vehicles