• • The Ti70Nb10Al15Cr5 MEA achieves a yield strength of 520.7 MPa at 650 °C (post-aging), directly addressing the high-temperature strength deficit of conventional Ti alloys above 600 °C, which is critical for turbine blades and compressor disks in aerospace engines.
• • With a density of 4.76 g/cm3, the alloy is 45% lighter than Inconel 718 (density ~8.2 g/cm3), offering a significant weight reduction for rotating components, thereby improving thrust-to-weight ratios and fuel efficiency.
• • The alloy retains >80 MPa yield strength up to 900 °C, outperforming commercial titanium alloys like Ti-1100 and TG6, and extends the operational envelope for Ti-based materials, potentially replacing heavier superalloys in intermediate-temperature sections.
• • The as-cast alloy exhibits 18% room-temperature ductility, a critical balance for manufacturability and damage tolerance, overcoming the typical brittleness of high-entropy alloys and enabling practical forming operations.