About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Deformation and Damage Mechanisms of High Temperature Alloys
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Presentation Title |
NOW ON-DEMAND ONLY – Investigating the High-temperature High-cycle Fatigue Properties of a Novel Fe-Ni-Cr-Al-Ti-based Superalloy |
Author(s) |
Shivakant Shukla, Jonathan Poplawsky, Donovan Leonard, Michael Lance, Govindarajan Muralidharan |
On-Site Speaker (Planned) |
Govindarajan Muralidharan |
Abstract Scope |
High-temperature high-cycle fatigue properties of a precipitation strengthened Ni-Fe-Cr-Al-Ti-based superalloy were evaluated at 900 °C using uniaxial fatigue testing in a servo-hydraulic frame. The microstructures before and after the cyclic loading were investigated using the scanning electron microscopy (SEM), electron backscattered diffraction, transmission electron microscopy and atom probe tomography. γ’ size evolution and oxidation after high-temperature fatigue testing were characterized to understand their role in determining fatigue life. Effect of second phases on fatigue crack initiation was evaluated by fractography and EDS analysis.
*Research sponsored by the U.S.DOE, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies, Propulsion Materials Program under contract DE-AC05-00OR22725 with UT-Battelle, LLC. APT was conducted at the ORNL’s Center for Nanophase Materials Sciences (CNMS), a U. S. DOE Office of Science User Facility. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Copper / Nickel / Cobalt, Mechanical Properties |