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Copper alloy resists creep and fatigue in rocket engine.(METALS)
Advanced Materials & Processes, November, 2004
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A copper alloy that is said to possess an excellent combination of thermal conductivity, thermal expansion coefficient, strength, creep resistance, ductility, and low-cycle fatigue (LCF) life has been developed at the NASA Glenn Research Center, Cleveland, Ohio, for components in regeneratively cooled rocket engines.
GRCop-84 (Cu-8Cr-4Nb) has significantly better properties than the current alloy, NARloy-Z (Cu-3Ag-0.5Zr). Therefore, it could improve engine performance and reliability. The thermal expansion of GRCop-84 was found to be at least 7% lower than for NARloy-Z. Lowering ...
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