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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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Lamb-wave sample orientation technique minimizes the interference from standing waves in continuous wave ultrasonic television imaging techniques used with thin metallic samples. The sample under investigation is oriented such that the wave incident upon it is not normal, but slightly angled.
Ultrasonic wrench system produces leaktight seals in flared tubing connections. It induces a flexural vibration mode in the coupling nut. The system consists of a frequency converter, a junction box, and wrench assembly.
Ultrasonic method is used to measure residual stress in metal structures. By using this method, various forms of wave propagation in metals are possible, and more thorough analysis of complex geometric structures may be had.
Plastic shoe aids inspection of thin walled stainless steel welded tubing to locate voids or other material defects in critical component equipment. Incorporated in available ultrasonic inspection equipment, it couples the transducer to the tube at desired incident angles.
Ballpoint-type ultrasonic probe assembly focuses its beam precisely on the bond lines of a composite thin face sheet structure when testing for bond integrity. It can scan in any direction, and eliminate external couplant spray.
Ultrasonic vibratory modes, frequencies, power levels, and pulse times for torque system of wrench-tightening aluminum and stainless steel flared tubing connections
Changes in ultrasonic attenuation of superconducting niobium at low magnetic fields, considering effects of low critical field impurity phases
Mechanized ultrasonic scanning system inspects the flaw content in the welds of space vehicle booster stages and propellant tanks. It is capable of scanning welds at speeds greater than 1 inch per second.
Electron multiplier, incorporated into the camera tube of an ultrasonic imaging system, improves resolution, effectively shields low level circuits, and provides a high level signal input to the television camera. It is effective for inspection of metallic materials for bonds, voids, and homogeneity.
Pulse echo ultrasonic system automatically determines the temperature in the core of a nuclear rocket engine by measuring the transit time of an acoustic pulse in a wire sensor. The measurement is based on the fact that the speed of sound in the sensor material is a function of temperature.
Ultrasonic wrench for flared tubing connections
Pulse echo ultrasonic system for automatically determining temperature by measuring round trip transit times in wire sensors
Ultrasonic vibration effect on precipitation hardening of steels and super alloys
Nondestructive ultrasonic testing for rapid inspection of weld defects in aluminium alloys
Evaluation of ultrasonic absorption technique for measuring high temperature gas properties
High temperature ultrasonic temperature measurements in nuclear rocket engine to determine feasibility of rhenium sensor as high temperature sensor
Ultrasonic radiography for weld flaw detection in butt joints of Saturn 5 S-1C stage
Basic theory and principles of ultrasonics related to nondestructive testing - programmed instruction textbook