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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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Metallographic study of stress rupture failed specimens of dispersion strengthened materials for determining relation between microstructural factors and stress rupture strengths
Dispersion of inerts in molten matrix by ultrasonic energy, and ultrasonic treatment of alloys to produce dispersion strengthening
Alloy strengthening by fine oxide particle dispersions
Cleaning and stabilization method for dispersion strengthened materials produced from mechanically produced blends of metals plus oxide powders
Changes in structure and mechanical properties due to loss of interstitials to reactive metal coatings studied in dispersion strengthened niobium alloys
Welding, aging, and oxygen contamination effects on dispersion strengthened tantalum base alloys
Wet and dry blending nickel-aluminum oxide submicron powders for dispersion-strengthened alloys
Alloy strengthening by fine oxide particle dispersion and splat cooling process for alloy development
Dispersion strengthened chromium alloys with minimal quantities of interstitial impurities
Cold working effects on dispersion strengthened nickel alloys containing thorium dioxide
Fine oxide particle dispersion strengthened alloy structures and mechanical properties and splat cooling process for alloy development
Arc heating process for preparation of dispersion strengthened nickel base alloy powder
Dispersion strengthened tantalum base alloys - continued development in test program
Dispersion strengthened tantalum base alloys - development with evaluation of oxygen contaminated and welded compositions
X-ray diffraction-Fourier series analysis and electron microscopy analysis of annealing effects on structural properties of cold worked dispersion-strengthened alloys
Electron microscopy analysis of dissolved hydrogen induced fracture in room temperature cantilever bend fatigue testing of dispersion strengthened aluminum-aluminum oxide alloy
Vapor deposition and precipitation hardening methods for producing dispersion chromium alloys
A theory is proposed whereby the plastic deformation of metal materials is determined by the difference between the applied stress and the back stress which characterizes the resistance of the material to plastic deformation. The back stress is usually equivalent to the internal stress or the friction stress and depends on the magnitude of the applied stress and temperature. The concept of back stress is applied to the case of the dislocation creep of precipitation-hardened or dispersion-strengthened metal materials. An additivity rule is formulated which can be useful in interpreting the creep behavior of such materials.