SEARCH · Search NASA
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Study was initiated to determine methods or test specimens for evaluating stress corrosion cracking characteristics of common structural materials. It was found that the methods of externally loading and corrosion testing were reliable in yielding reproducible results for stress corrosion evaluation.
Heat energy transfer is concentrated closely around a melted joint and the temperature drop across it decreases rapidly as the bolt and nut are tightened to a minimum torque level. Flat metal surfaces pressed together display a cyclical improvement in heat energy transfer as the interface pressure is increased.
Report summarizes the experimental and theoretical data on the vibrational response of thin-walled pipe sections to the wall pressure field applied within them by a fully developed turbulent fluid flow. The predicted responses were in good agreement with previous data obtained.
Argon gas flow through an internal interrupted finned tube was investigated to obtain heat transfer and frictional pressure drop data. The results were plotted against the same data for corresponding louvered plate-finned surfaces.
Study of the corrosion resistance of several stainless steels to zinc vapor revealed that some stainless steels could be employed for use in zinc processing equipment housings or vapor lines.
Study shows that the growth of X irradiated sunflower seeds is inversely related to the metabolism of the seeds. The actual magnitudes of the relation between the two differed for various ranges of X ray exposure. The results of the study suggested that the X rays affected the embryo.
Gas tungsten arc method for optimal weldments in steel plates for large rocket motor case
Shell theory and variation method for calculating large panel buildings as three-dimensional systems
Critical stresses and deformation pattern after buckling for flexible rectangular plates of nonlinearly elastic materials
Scientific and technological research policy of France
Return of high energy splash albedo electrons to earth investigated under limitations of Stormer theory
Survey reviews the structural applications of refractory metals and the special problems they present in manufacture, evaluation, and application. The unique facilities required for their processing and evaluation, a summary of accomplishments in achieving commercial products, and the present status of the most advanced refractory materials are presented.
Sleeve bearings of DU material consisting of thin bronze spheres lining surrounded by mixture of TFE fluorocarbon plastic and lead sintered on tin plated steel backing
Temperature effects on aluminum alloy, nickel, and electrolytic chromium surface stability of astronomical mirror
Chromium and nickel powders from reduction of chromium and nickel oxides with magnesium, lithium, or sodium vapors
Human performance observations at high altitude, high latitude manned facility in Arctic region
Fluorine nuclei in primary cosmic radiation identified by counter telescope measurements on Pioneer 8 spacecraft
Method developed employs high pressure combined with strong vacuum force to compact ablation models into desired conical shape. Technique eliminates vapor hazard and results in high material density providing excellent structural integrity.