Laves Phase-Strengthened Austenitic Steels for Coal-Fired Power Systems Email Page
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Performer: Trustees of Dartmouth College
SE image from fracture surface of sample after cold<br/>rolling and annealing at 800 ˚C for 2.4 h (a, c) after<br/>thermo-mechanical treatment method #1, and (b, d)<br/>after thermo-mechanical treatment method #2.
SE image from fracture surface of sample after cold
rolling and annealing at 800 ˚C for 2.4 h (a, c) after
thermo-mechanical treatment method #1, and (b, d)
after thermo-mechanical treatment method #2.
Website: Trustees of Dartmouth College
Award Number: FE0008857
Project Duration: 09/01/2012 – 03/31/2016
Total Award Value: $408,359
DOE Share: $294,071
Performer Share: $114,287
Technology Area: University Training and Research
Key Technology: High Performance Materials
Location: Hanover, New Hampshire

Project Description

The project objective is to develop models of both the precipitation kinetics and deformation behavior of aluminum-alloyed, Laves phase-strengthened, austenitic steels. Specific objectives for the first year of the project include thermomechanical processing of fifteen specimens, microstructural analysis of the matrix and precipitates, and mechanical testing to determine room-temperature yield strengths and elongations in five specimens. Second-year objectives are thermo-mechanical processing of twenty specimens; microstructural analysis of particle size, spacing, precipitate chemistry, and tomography to select samples of interest in each state; mechanical testing to measure creep rates of microstructures, deformation analysis at various temperatures, and analysis of fracture behavior; and transmission electron microscopy (TEM) to analyze dislocation/precipitate interactions. Year three objectives include completing TEM in-situ annealing experiments, developing quantitative models to describe precipitation processes, and determining the relationship of microstructures to mechanical properties under various conditions.Scientific insight into the effects of prior deformation on the precipitation processes and resultant mechanical properties of these advanced materials will provide a basis for the specification, design, fabrication, operation, and maintenance of advanced power generation plants.

Project Benefits

This project will develop Laves Phase-Strengthened austenitic steels for coal-fired power systems. Scientific insight into the effects of prior deformation on the precipitation processes and resultant mechanical properties of these advanced materials will provide a basis for the specification, design, fabrication, operation, and maintenance of advanced power plants. 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 resulting and lower operating costs.

Contact Information

Federal Project Manager Jason Hissam: jason.hissam@netl.doe.gov
Technology Manager Robert Romanosky: robert.romanosky@netl.doe.gov
Principal Investigator Jill Mortali: egrants.gov@dartmouth.edu

 

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