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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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Servo system senses variations in fusion welding process, and adjusts the control parameters to compensate for them. The system assumes a correlation between uniform weld penetration and temperature gradients near the molten puddle. It senses weld properties and makes adjustments to travel speed and weld current.
Process produces continuous internal channel systems on a repeatable basis in 2014-T6 aluminum. Standard machining forms the initial channel, which is filled with tungsten carbide powder. TIG machine fusion welding completes formation of the channel. Chem-mill techniques enlarge it to the desired size.
Physical and chemical properties of iron meteorite and mesosiderite fusion crusts, and cosmic spherule production
Nondestructive testing for detecting lack of penetration in aluminum fusion welds
Crystalline polyethylene heat of fusion using scanning calorimeter
Density determination by flotation method for solution grown crystals of polyethylene, noting specific volume-heat of fusion relationships
Density and heat of fusion of folded chain polyethylene crystals
Wrought superalloys fusion welding behavior, discussing hot cracking, hot microfissuring and strain age cracking
Reliable and accurate Delta technique, a nondestructive ultrasonics method, uses redirection of energy to detect randomly oriented imperfections in fusion butt welds. Data on flaws can be read from either an oscilloscope or a printout.
Application of fusion reactors to space propulsion and power generation
Comparison of nitrogen determination in tantalum alloys by Kjeldahl and vacuum fusion techniques
Technological problems anticipated in fusion reactor application to spacecraft propulsion and power generation
Binocular fusion and rivalry effects on cortically evoked human potential, obtaining pattern characteristic responses to monocular stimulation
Geometrical analysis of partial fusion in earth crust and mantle formation, discussing solid solution and boundaries in MgO-iron oxide- silicon dioxide system
Linear aliphatic polyesters, calculating conformational contribution to heats and entropies of fusion
Linear aliphatic polyesters melting point, fusion heat and entropy correlations to molecular parameters
Fusion rocket systems characterized by high specific impulse and relatively low specific mass
Deuterium helium-3 fusion power balance calculations with inclusion of variable cyclotron radiation parameter