| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Testing to Understand the Long Term Performance of High Temperature Materials
|
| Presentation Title |
Accelerated Evaluation of Nanometer Scale Plastic Deformation Events Characteristics for Long-term Performance Prediction |
| Author(s) |
Dhruv Anjaria, Christopher Bean, Samuel Hemery, J.C. Stinville |
| On-Site Speaker (Planned) |
J.C. Stinville |
| Abstract Scope |
This study illustrates the connection between the characteristics of deformation events at the nanometer scale, which develop during early cycling, and the long-term performance of structural materials. Automated imaging inside the scanning electron microscope is used to perform high-resolution digital image correlation measurements over large fields of view. The characteristics of deformation events are then extracted using a computer vision algorism. The characteristics of the most intense deformation events that arise during the first loading cycle are found to inform long-term performance. The fatigue strength of a nickel-based superalloy and its dependency on temperature are rapidly evaluated using the proposed methodology. The reduction in the lifetime of a titanium alloy subjected to different load hold periods is analyzed in light of the change in the intensity of deformation events during the first dwell-fatigue cycle. Perspectives to apply this high-throughput experimental approach to a broader range of conditions are discussed. |
| Proceedings Inclusion? |
Planned: |