Engineering topics
Publications and source records attributed to Freche, J. C..
Prealloyed powders of Ni base alloys, Alloy 713C and NASA TAZ-8A made by inert gas atomization for improved strength and ductility
Nickel base alloy, WAZ-20 with improved strength in 2000-2200 F range for application to gas turbine engine stator vanes
Nickel-base superalloy has a strength of 20,000 psi at 2,200 degrees F, approximately double the strength of the strongest available cast nickel-base alloys. It is not subject to the formation of embrittling phases upon long time exposure at intermediate temperatures.
High strength superplastic superalloys are produced by extruding a pre-alloyed powder. The cast nickel base superalloy was remelted and converted to pre-alloyed powder by inert gas atomization. The superalloy shows high tensile strength and superplasticity and finds use in hot working and casting.
Development and high temperature tests of high strength nickel alloy for stator vanes of gas turbine engines
Extruded prealloyed powder evaluation for two nickel-base alloys
Ultrasonic detection and measurement of fatigue cracks in notched cylinders subjected to reversed axial cyclic loading
High temperature ferromagnetic cobalt-base alloy for electrical power generating equipment
Nickel base alloy with high strength, ductility, good impact and oxidation resistance, microstructural stability, workability potential, and the ability to show improved strength and ductility when directly solidified has recently been developed for high temperature applications.
Ultrasonic detection and measurement of fatigue cracks in notched cylinders subjected to reversed axial cyclic loading
Ultrasonic detection and measurement of fatigue crack propagation in notched specimens of aluminum, titanium, and cobalt alloys and maraging steels
NASA programs for development of high temperature alloys for advanced air breathing engines emphasizing cast Ni-base alloy
Co-W alloy for rotor material in space power conversion system improves high temperature stress-rupture and magnetic properties
Tensile fatigue behavior of liquid rocket engine metal alloy sheet construction materials at cryogenic temperatures
Directional solidification techniques applied to nickel base alloy /TAZ-8B/ improve grain orientation, ductility, tensile strength and stress-rupture life
Modifying the chemistry of the NASA TAZ-8 alloy and utilizing vacuum melting techniques provides a high strength, workable nickel base superalloy with improved oxidation resistance for use up to 2200 degrees F.
Cobalt-base alloy which combines high temperature strength and magnetic properties has a composition in weight percent of 7-1/2 tungsten, 2-1/2 iron, 1 titanium, 1/2 zirconium, 1/2 carbon, and the balance cobalt. It may be used as construction material for electric motors and generators operating at high temperatures.
Directional solidification of nickel base alloy TAZ-8B to enhance potential for advanced gas turbine engine applications