Computational Design of Creep-Resistant Alloys and Experimental Validation in Ferritic Superalloys

 

Dispersion of B2-NiAl-type precipitates in a bcc-Fe matrix<br/>(G. Ghosh, unpublished research, NU)
Dispersion of B2-NiAl-type precipitates in a bcc-Fe matrix
(G. Ghosh, unpublished research, NU)
Performer: 
University of Tennessee
Website:  University of Tennessee
Award Number:  FE0005868
Project Duration:  10/01/2010 – 12/31/2014
Total Award Value:  $1,533,680.00
DOE Share:  $1,200,000.00
Performer Share:  $333,680.00
Technology Area:  Plant Optimization Technologies
Key Technology:  High Performance Materials
Location:  Knoxville, Tennessee

Project Description

The objectives of the proposed research are to: (1) develop and integrate modern computational tools and algorithms required to assist in the optimization of creep properties of high-temperature alloys for fossil-energy applications; and (2) achieve a fundamental understanding of the processing-microstructure-property-performance links underlying the creep behavior of novel ferritic superalloys strengthened by B2 and/or L21 intermetallics. In the first objective, researchers seek to integrate tools and methods associated with predictive first-principles calculations, computational thermodynamic and kinetic modeling, and meso-scale dislocation-dynamics simulations. In the second objective, some of the computational results we will be validated by measuring selected microstructural attributes in representative model ferritic superalloys with a hierarchical microstructure, where the Fe-based disordered matrix is strengthened by one or two ordered precipitate(s).

Project Benefits

This project will develop a computational design of creep-resistant alloys and experimental validation in ferritic superalloys. Improvement to high-temperature advanced-materials will promote the development of advanced power plant designs that can operate at higher temperatures and pressures, leading to improvements in efficiency and operational flexibility and resulting in lower operating costs.

Contact Information

Federal Project Manager 
Richard Dunst: richard.dunst@netl.doe.gov
Technology Manager 
Susan Maley: susan.maley@netl.doe.gov
Principal Investigator 
P. K. Liaw: pliaw@utk.edu
 

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