About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Materials for High Temperature Applications: Next Generation Superalloys and Beyond
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Presentation Title |
Effect of Alloy Composition on the Microstructure of Developmental Iridium Alloys |
Author(s) |
Noah Kohlhorst, Glenn Romanoski, Govindarajan Muralidharan, Roger Miller, Ji-Cheng Zhao |
On-Site Speaker (Planned) |
Noah Kohlhorst |
Abstract Scope |
Iridium alloys such as DOP-26 contain thorium which acts as a grain boundary strengthener and restricts grain growth through the formation of intermetallic precipitates. Previous work showed that cerium can be used as a partial or full substitute of thorium with a similar effect on microstructure, but minimal work was done to quantitatively compare the microstructures of alloys containing cerium. In this work, we will evaluate quantitatively the effect of cerium on the grain size, grain shape, nature and distribution of the recipitates and compare the microstructure of cerium containing alloys with the microstructure of thorium containing alloys. *Research sponsored by the United States Department of Energy (DOE) Office of Facilities Management (NE-31) at the Oak Ridge National Laboratory, managed by UT-Battelle, LLC for the U.S. DOE. Support and guidance were provided by Mary McCune of the US DOE. Primary funding was provided by the NASA Science Mission Directorate. |
Proceedings Inclusion? |
Planned: |