| About this Abstract |
| Meeting |
TMS Specialty Congress 2024
|
| Symposium
|
Accelerating Discovery for Mechanical Behavior of Materials 2024
|
| Presentation Title |
Temperature and Dwell Hold Dependences of Fatigue Life by High-throughput High-resolution Digital Image Correlation |
| Author(s) |
J.C. Stinville, D. Anjaria, C. Bean, R.L. Black, S. Sanandiya, S. Hemery |
| 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 algorithm. The characteristics of the deformation events that arise during the first loading cycle are found to inform long-term performance. Two material systems are investigated. First, the fatigue strength of a nickel-based superalloy and its dependency on temperature is rapidly evaluated using the proposed methodology. We identified the detrimental role of grain boundary sliding when temperature increases. Second, the reduction in 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. |
| Proceedings Inclusion? |
Definite: Other |