Computational Design of MoCr Superalloys for High Temperature Service

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: W31P4Q-09-C-0450
Agency Tracking Number: 08SB2-0176
Amount: $98,978.00
Phase: Phase I
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: SB082-007
Solicitation Number: 2008.2
Small Business Information
1820 Ridge Avenue, Evanston, IL, 60201
DUNS: 088176961
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 James Wright
 Director - Product Development
 (847) 425-8225
 jwright@questek.com
Business Contact
 Raymond Genellie,
Title: Vice President - Operations
Phone: (847) 425-8211
Email: rgenellie@questek.com
Research Institution
N/A
Abstract
This Phase I project applies QuesTek’s unique computational materials design technology to the development of ductile, oxidation-resistant, and creep-resistant MoCr superalloys for use at 1300°C and above. Mo-Si-B or Nb-based systems developed for such demanding structural applications have encountered significant difficulties related to ductility and/or oxidation-resistance. QuesTek will pursue a radical new microstructural concept with the potential of achieving critical performance requirements simultaneously: novel multiphase Mo-Cr alloys composed of a ductile BCC matrix (for toughness) and aluminide phases for oxidation resistance and creep strength. Utilizing CALPHAD-based thermodynamics, and building on prior research at Northwestern University on refractory metal systems, the ductility and oxidation resistance of the Mo-Cr alloys will employ the following design strategies: a) Increasing the ductility of the BCC matrix phase by suitable alloying additions based on quantum-mechanical calculations of the generalized stacking fault energy, minimizing the matrix DBTT and b) Improving intrinsic oxidation resistance of the BCC matrix, using design methods for external protective oxide-scale formation. Phase I will design and validate proof-of-concept Mo-Cr alloys at sub-scale, and Phase II will develop, prototype, and characterize for subsequent implementation into DoD weapons platforms.

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

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