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Title: Steam Turbine Materials for Ultrasupercritical Coal Power Plants

Abstract

The Ultrasupercritical (USC) Steam Turbine Materials Development Program is sponsored and funded by the U.S. Department of Energy and the Ohio Coal Development Office, through grants to Energy Industries of Ohio (EIO), a non-profit organization contracted to manage and direct the project. The program is co-funded by the General Electric Company, Alstom Power, Siemens Power Generation (formerly Siemens Westinghouse), and the Electric Power Research Institute, each organization having subcontracted with EIO and contributing teams of personnel to perform the requisite research. The program is focused on identifying, evaluating, and qualifying advanced alloys for utilization in coal-fired power plants that need to withstand steam turbine operating conditions up to 760°C (1400°F) and 35 MPa (5000 psi). For these conditions, components exposed to the highest temperatures and stresses will need to be constructed from nickel-based alloys with higher elevated temperature strength than the highchromium ferritic steels currently used in today's high-temperature steam turbines. In addition to the strength requirements, these alloys must also be weldable and resistant to environmental effects such as steam oxidation and solid particle erosion. In the present project, candidate materials with the required creep strength at desired temperatures have been identified. Coatings that can resist oxidation and solidmore » particle erosion have also been identified. The ability to perform dissimilar welds between nickel base alloys and ferritic steels have been demonstrated, and the properties of the welds have been evaluated. Results of this three-year study that was completed in 2009 are described in this final report. Additional work is being planned and will commence in 2009. The specific objectives of the future studies will include conducting more detailed evaluations of the weld-ability, mechanical properties and repair-ability of the selected candidate alloys for rotors, casings and valves, and to perform scale-up studies to establish a design basis for commercial scale components. A supplemental program funded by the Ohio Coal Development Office will undertake supporting tasks such as testing and trials using existing atmospheric, vacuum and developmental pressure furnaces to define specific metal casting techniques needed for producing commercial scale components.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Energy Industries Of Ohio, Incorporated
Sponsoring Org.:
USDOE
OSTI Identifier:
1081317
DOE Contract Number:  
FC26-05NT42442
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; 36 MATERIALS SCIENCE

Citation Formats

Viswanathan, R., Hawk, J., Schwant, R., Saha, D., Totemeier, T., Goodstine, S., McNally, M., Allen, D. B., and Purgert, Robert. Steam Turbine Materials for Ultrasupercritical Coal Power Plants. United States: N. p., 2009. Web. doi:10.2172/1081317.
Viswanathan, R., Hawk, J., Schwant, R., Saha, D., Totemeier, T., Goodstine, S., McNally, M., Allen, D. B., & Purgert, Robert. Steam Turbine Materials for Ultrasupercritical Coal Power Plants. United States. doi:10.2172/1081317.
Viswanathan, R., Hawk, J., Schwant, R., Saha, D., Totemeier, T., Goodstine, S., McNally, M., Allen, D. B., and Purgert, Robert. Tue . "Steam Turbine Materials for Ultrasupercritical Coal Power Plants". United States. doi:10.2172/1081317. https://www.osti.gov/servlets/purl/1081317.
@article{osti_1081317,
title = {Steam Turbine Materials for Ultrasupercritical Coal Power Plants},
author = {Viswanathan, R. and Hawk, J. and Schwant, R. and Saha, D. and Totemeier, T. and Goodstine, S. and McNally, M. and Allen, D. B. and Purgert, Robert},
abstractNote = {The Ultrasupercritical (USC) Steam Turbine Materials Development Program is sponsored and funded by the U.S. Department of Energy and the Ohio Coal Development Office, through grants to Energy Industries of Ohio (EIO), a non-profit organization contracted to manage and direct the project. The program is co-funded by the General Electric Company, Alstom Power, Siemens Power Generation (formerly Siemens Westinghouse), and the Electric Power Research Institute, each organization having subcontracted with EIO and contributing teams of personnel to perform the requisite research. The program is focused on identifying, evaluating, and qualifying advanced alloys for utilization in coal-fired power plants that need to withstand steam turbine operating conditions up to 760°C (1400°F) and 35 MPa (5000 psi). For these conditions, components exposed to the highest temperatures and stresses will need to be constructed from nickel-based alloys with higher elevated temperature strength than the highchromium ferritic steels currently used in today's high-temperature steam turbines. In addition to the strength requirements, these alloys must also be weldable and resistant to environmental effects such as steam oxidation and solid particle erosion. In the present project, candidate materials with the required creep strength at desired temperatures have been identified. Coatings that can resist oxidation and solid particle erosion have also been identified. The ability to perform dissimilar welds between nickel base alloys and ferritic steels have been demonstrated, and the properties of the welds have been evaluated. Results of this three-year study that was completed in 2009 are described in this final report. Additional work is being planned and will commence in 2009. The specific objectives of the future studies will include conducting more detailed evaluations of the weld-ability, mechanical properties and repair-ability of the selected candidate alloys for rotors, casings and valves, and to perform scale-up studies to establish a design basis for commercial scale components. A supplemental program funded by the Ohio Coal Development Office will undertake supporting tasks such as testing and trials using existing atmospheric, vacuum and developmental pressure furnaces to define specific metal casting techniques needed for producing commercial scale components.},
doi = {10.2172/1081317},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 30 00:00:00 EDT 2009},
month = {Tue Jun 30 00:00:00 EDT 2009}
}

Technical Report:

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