About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Incipient Plastic Localization from Cryogenic to High Temperatures in a Nickel Based-superalloy |
Author(s) |
Dhruv Anjaria, Darren Pagan, Jean-Charles Stinville |
On-Site Speaker (Planned) |
Dhruv Anjaria |
Abstract Scope |
Mechanical testing of Inconel 718 alloy over a wide range of temperatures, from near absolute zero to 600°C, provides insights into the temperature dependence of plastic localization in extreme temperature conditions. In situ high-resolution digital image correlation measurements over representative microstructural regions during monotonic deformation reveal multiple transitions in active deformation mechanisms with temperature. In particular, plastic localization intensity varies with temperature and is observed to influence the fatigue strength of Inconel 718. Tests at cryogenic temperatures indicate competition between deformation twinning and dislocation slip, with unusual deformation processes when approaching temperature near absolute zero. At 600°C, grain boundary sliding is observed to enhance slip localization at specific microstructural features inducing a change in controlling microstructure features. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, |