Computational Design of MoCr Superalloys for High Temperature Service

Award Information
Agency:
Department of Defense
Branch
Defense Advanced Research Projects Agency
Amount:
$98,978.00
Award Year:
2009
Program:
SBIR
Phase:
Phase I
Contract:
W31P4Q-09-C-0450
Award Id:
91687
Agency Tracking Number:
08SB2-0176
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
1820 Ridge Avenue, Evanston, IL, 60201
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
088176961
Principal Investigator:
JamesWright
Director - Product Development
(847) 425-8225
jwright@questek.com
Business Contact:
RaymondGenellie,
Vice President - Operations
(847) 425-8211
rgenellie@questek.com
Research Institute:
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 1300oC 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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