About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
K-18: Understanding Deformation Mechanisms in a Low Ni/Co Alloy |
Author(s) |
Bharat Gwalani, Govindarajan Muralidharan, Dean T Pierce, Jonathan Poplawsky, Donovan Leonard, Libor Kovarik, Arun Devaraj |
On-Site Speaker (Planned) |
Arun Devaraj |
Abstract Scope |
Commercial Ni-base alloys IN751 is the most commonly used for higher performance exhaust valves, with a very good combination of strength and oxidation resistance. Oak Ridge National Laboratory has recently developed a new, alloy with lower Ni + Co alloy intended for operation up to 900oC and 950oC. This alloy is strengthened by the presence of ’ precipitates at these temperatures. However, there is interest in understanding the effectiveness of strengthening of these alloys at these temperatures. Hence we conducted detailed microstructural characterization before and after tensile and creep deformation to understand the deformation mechanisms. The deformation induced microstructural changes such as dislocation activity, precipitate morphology changes and deformation induced solute segregation etc. are investigated using both aberration corrected scanning transmission electron microscopy and atom probe tomography.
Research sponsored by the U.S.DOE, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |