Ultra-high strength multphase high-entropy alloys
| DWPI Title: Refractory-reinforced multiphase high entropy alloy used in additive manufacturing of deposited metallic structures, comprises aluminum, titanium, niobium, zirconium, molybdenum, and tantalum |
| Abstract: Refractory-reinforced multiphase high entropy alloys (RHEAs) advantageously providing high strength and fracture toughness in an as-AM deposited condition and other conditions are described. |
| Use: The refractory-reinforced multiphase high-entropy alloy is useful for additive manufacturing (AM) of AM deposited metallic structures. |
| Advantage: The refractory-reinforced multiphase high-entropy alloy provides high strength and fracture toughness in an as-built AM deposited condition as well as in a sintered condition or a rapidly solidified (RS) condition, all of which would result in a highly refined grain size. |
| Novelty: Alloy comprises aluminum and titanium as major alloy constituents, and niobium, zirconium, molybdenum, and tantalum as minor alloy constituents whose minor collective content is effective to provide a polyphase microstructure including multiple compositionally distinct phases. The alloy exhibits a specific strength based on hardness: density ratio at room temperature of 1.8-2.6 GPa-cm3 /g. It exhibits a mechanical strength that is independent of temperature up to 800° C. It is at least one of an as-built additive manufacturing structure, a sintered structure, and a solidified structure. |
| Filed: 11/21/2022 |
| Application Number: US17803779A |
| Tech ID: SD 15669.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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