| Abstract Scope |
Conventional high-temperature titanium alloys find themselves in advanced aeroengines for applications at ~600°C owing to their superior combination of ambient and supra-ambient-temperature mechanical properties and oxidation resistance. We adopted a decision science-driven approach to analyze several high-temperature Ti alloys' mechanical properties. We applied a novel methodology that combines multiple-attribute decision-making (MADM) methods, principal component analysis (PCA), and cluster analysis (CA). The rank assigned by several MADMs, viz., Combined compromise solution (CoCoSo), Operational competitive ratio (OCRA), Multi-attribute border approximation area (MABAC), and Range of value method (ROVM), were consistent. PCA and CA not only consolidated the MADM ranks of the alloys but also grouped similar alloys. The investigation highlights similarities across several alloys, suggests potential replacement or substitute for existing alloys, and provides guidelines for alloy-design of titanium alloys over the current ones to push out some of the heavier alloys and thus reduce the weight of the engine to advantage. |