Probabilistic Prediction of Location-Specific Microstructure in Turbine Disks

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N00014-10-M-0265
Agency Tracking Number: N10A-028-0087
Amount: $69,972.00
Phase: Phase I
Program: STTR
Awards Year: 2010
Solicitation Year: 2010
Solicitation Topic Code: N10A-T028
Solicitation Number: 2010.A
Small Business Information
UES, Inc.
4401 Dayton-Xenia Road, Dayton, OH, 45432
DUNS: 074689217
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Yoon-Suk Choi
 Research Scientist'
 (937) 426-6900
Business Contact
 Bryce Skinn
Title: Business Relations Manage
Phone: (937) 426-6900
Research Institution
 The Pennsylvania State University
 Sue A Lavan
 248 Deike Building
University Park, PA, 16802
 (814) 865-7650
 Nonprofit college or university
Thermo-mechanical processes of turbine disks have been progressively improved to meet microstructural requirements tailored for advanced, sustainable high temperature performances. However, the chemistry of typical Ni-base turbine disk alloys is very complex, and yields a variety of phases and microstructural anomalies under different thermo-mechanical heat treatments. These microstructural heterogeneities and anomalies often limit thermo-mechanical behaviors of turbine disks. The proposed Phase I program will focus on the development of multi-physics based computational tools and approaches for the prediction of HT-processing dependent microstructures, the characterization of their statistical features/anomalies and the corresponding mechanical responses, and the identification of the critical microstructural feature that may limit the performance life. A conventional Ni-base polycrystalline superalloy IN718 was chosen as a target material for the proposed work because of its most common usage for the turbine disk application and the large amount of data available from various resources. Due to the microstructural complexity of IN718, the property prediction requires rigorous numerical approaches to account for microstructural heterogeneities. The successful completion of Phase I efforts will bring microstructure-sensitive computational tools and approaches for the evaluation of differently processed IN718 disk alloys.

* information listed above is at the time of submission.

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