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Development Of Titanium-Ruthenium-Aluminum Alloys For High Temperature Applications In Aerospace Propulsion Systems. Develop potential Ti-Ru-Al alloys for hi T applns in aerospace propulsion systems – replace Ni-base superalloys:.
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Development Of Titanium-Ruthenium-Aluminum Alloys For High Temperature Applications In Aerospace Propulsion Systems
Develop potential Ti-Ru-Al alloys for hi T applns in aerospace propulsion systems – replace Ni-base superalloys:
Develop potential Ti-Ru-Al alloys for hi T applns in aerospace propulsion systems – replace Ni-base superalloys: Density ~ 30% lower 25-35% increase in specific strength possible
Ti-Ru-Al alloys: • Phase diagram largely determined
Ti-Ru-Al alloys: • Phase diagram largely determined • Little known about metallurgical characteristics or properties
Ti-Ru-Al alloys: • Phase diagram largely determined • Little known about metallurgical characteristics or properties • Essentially unexplored territory with respect to applns as structural materials
Interesting: • Ru - strong -Ti stabilizer…..stable over significant composition range from room temperature to 1550°C minimum
Interesting: • Ordering rxn in Ti-Ru-Al phase - possible strengthening beyond solid solution strengthening in titanium alloys
Interesting: • Ti-2Ru-18Al alloy may be stable to ~900°C
Interesting: • Ti-2Ru-18Al alloy may be stable to ~900°C • Ti-Ru-Al alloys with only few % Ru can be quenched from 1250°C to several different types of martensites - possible strengthening avenue
Interesting: • Ti-2Ru-18Al alloy may be stable to ~900°C • Ti-Ru-Al alloys with only few % Ru can be quenched from 1250°C to several different types of martensites - possible strengthening avenue • Diffusion rates quite low, even at 1300°C
Interesting: • Ti-2Ru-18Al alloy may be stable to ~900°C • Ti-Ru-Al alloys with only few % Ru can be quenched from 1250°C to several different types of martensites - possible strengthening avenue • Diffusion rates quite low, even at 1300°C • Excellent oxidation resistance
Investigate selected Ti-Ru-Al alloys (0-5% Ru, 0-20% Al; 20-40% Ru, 0-5% Al): • Structural characteristics (optical & electron microscopy & x-ray diffraction)
Investigate selected Ti-Ru-Al alloys (0-5% Ru, 0-20% Al; 20-40% Ru, 0-5% Al): • Structural characteristics (optical & electron microscopy & x-ray diffraction) • Structural stability at hi T
Investigate selected Ti-Ru-Al alloys (0-5% Ru, 0-20% Al; 20-40% Ru, 0-5% Al): • Structural characteristics (optical & electron microscopy & x-ray diffraction) • Structural stability at hi T • Mechanical properties vs. T
Investigate selected Ti-Ru-Al alloys (0-5% Ru, 0-20% Al; 20-40% Ru, 0-5% Al): • Structural characteristics (optical & electron microscopy & x-ray diffraction) • Structural stability at hi T • Mechanical properties vs. T • Effect of heat treatment on structures • & props