About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Materials for High Temperature Applications: Next Generation Superalloys and Beyond
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Presentation Title |
Synchrotron X-Ray Scattering Characterization of Strengthening Precipitates in a Model Ni-based Alloy |
Author(s) |
Matthew G. Frith, John Chiles, Jonathan Poplawsky, Jan Ilavsky, Govindarajan Muralidharan |
On-Site Speaker (Planned) |
Matthew G. Frith |
Abstract Scope |
High performance Ni-based alloys are required for use in exhaust valve applications in the next generation, high efficiency automotive engines. Simultaneous small angle x-ray scattering (USAXS/SAXS) and diffraction (WAXS) were applied for the ex situ and in situ characterization of the γ’ precipitates in a model Ni-based alloy. Understanding microstructure of the γ’ precipitates is critical to achieving the desirable performance characteristics of these alloys in this application. Multiple modeling approaches were applied to the small-angle scattering data; for general characterization the Unified fit model, and a particulate model of particle size distribution with various shape form factors combined with structure factor for advanced analysis. Effect of models used on particle sizes obtained will be elucidated. In situ measurements were used to characterize precipitate coarsening behavior with respect to time and temperature. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Characterization, |