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Materials Modeling Tool for Alloy Design to Streamline the Development of High Temperature, High-Entropy Alloys for Advanced Propulsion Systems

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-19-C-0198
Agency Tracking Number: N17B-031-0082
Amount: $816,732.00
Phase: Phase II
Program: STTR
Solicitation Topic Code: N17B-T031
Solicitation Number: 17.B
Solicitation Year: 2017
Award Year: 2019
Award Start Date (Proposal Award Date): 2019-01-11
Award End Date (Contract End Date): 2021-01-21
Small Business Information
2 Boars Head Lane
Charlottesville, VA 22903
United States
DUNS: 036500804
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Derek Hass
 Vice President - Research & Development
 (434) 977-1405
Business Contact
 Matthew Terry
Phone: (434) 977-1405
Research Institution
 Univ. of Wisconsin - Madison
 Brenda Egan Brenda Egan
21 N. Park Street Suite 6401
Madison, WI 53715
United States

 (608) 262-3822
 Nonprofit College or University

The performance of gas turbine engines is greatly improved as engine operation temperatures are increased. This has dictated that the hot structural components, made of nickel-based superalloys, often operate at temperatures approaching their melting point. Alternate materials with higher temperature performance are desired for use in the hot section of gas turbine engines. Higher temperature capable metallic systems also exist with alloys based on Mo and Nb of high interest due to their high melting points, good creep properties and acceptable high temperature (>1200°C) oxidation performance in air. However, their high density and propensity to fail in a brittle manner at low temperatures is limiting as is the poor oxidation performance of Mo-based alloys at moderate temperatures (~800°C) due to the vaporization of MoO3. High entropy alloys are alloys with five or more principal elements leading to significantly higher mixing entropies than conventional alloys. This promotes the formation of solid solution phases with simple crystal structures and can result in enhanced alloy properties including enhanced high temperature strength, good structural stability, low diffusion coefficients, good creep resistance and good oxidation resistance. In this work, we explore the development of Mo-based, and optionally Nb-based, HEAs as potential high temperature structural alloys.

* Information listed above is at the time of submission. *

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