Properties of Advanced Ni-Based Alloys for A-USC Steam Turbines Email Page
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Performer:  Oak Ridge National Laboratory (ORNL) Location:  Oak Ridge, TN
Project Duration:  02/01/2016 – 09/30/2018 Award Number:  FWP-FEAA125
Technology Area:  Plant Optimization Technologies Total Award Value:  $2,160,000
Key Technology:  High Performance Materials DOE Share:  $2,160,000
Performer Share:  $0

Cast Haynes 282 fractures mainly along<br/>heavily precipitated dendrite colony boundaries.
Cast Haynes 282 fractures mainly along
heavily precipitated dendrite colony boundaries.

Project Description

The National Energy Technology Laboratory (NETL) is partnering with Oak Ridge National Laboratory to evaluate the behavior of high-temperature materials to complement the efforts of the advanced ultra-supercritical (A-USC) Steam Turbine Materials Consortium in qualifying alloys for steam turbine designs required for operation under A-USC steam conditions (760°C and 345 bar/1,400°F and 5,000 psig steam), and in ensuring that any limitations of current materials are overcome. This project will perform creep-testing and microstructural characterization of a large cast valve body of Haynes 282 alloy; evaluate long-term creep resistance of a large forging of Haynes 282 alloy, including the effects of fine grain size; evaluate steam effects and pre-test microcracks on the fatigue behavior of the large forging of Haynes 282 alloy; perform microstructural characterization and longer-term creep testing for dissimilar metal welds of lnconel 740H pipe joined to Haynes 282 alloy valve casting; develop constitutive equations or predictive models and upgrade the damage evaluation and life-prediction criteria; and perform tests to assess the effects of carbon dioxide (CO2) on mechanical behavior.

Project Benefits

This project will reduce the quantity and cost of components made from nickel superalloys by developing more precise mechanical behavior data that can be used in more accurate models of the mechanical behavior of these components under varying high temperature and applied stress conditions.

Presentations, Papers, and Publications

Contact Information

Federal Project Manager Vito Cedro:
Technology Manager Briggs White:
Principal Investigator Peter Tortorelli: