| Abstract Scope |
Titanium alloys, with their low density, exceptional mechanical properties, and outstanding corrosion resistance, play a vital role for Landing Gear applications. Decision science-driven assessment of these Ti alloys, integrating multiple-attribute decision-making (MADM) methods, principal component analysis (PCA), and hierarchical clustering (HC) is based on current literature. The methodology identifies five top-ranked Ti alloys and assists and verifies the guidelines for alloy design. The top-ranked alloy, Ti1300-BM-nano-α (Ti-5Al-4V-4Mo-3Zr-4Cr), stands out with a percentage elongation (%EL) ~3.3 times greater than the benchmark or goal (density, d = ~4.6 g/cm3; yield strength YS = ~1250 MPa; %El = ~5), while maintaining similar density and yield strength. The analyses underline that metastable β Ti alloys comprising globular primary α + trans β matrix coupled with α precipitates in trans β are the base optimal microstructure to fine-tune using thermomechanical processing for aircraft landing gear applications. |