| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Investigation of the Fatigue Crack Behavior of 304 Stainless Steels Using Synchrotron X-ray Tomography |
| Author(s) |
Ryan Michael Schoell, Li Xi, Harvey West, Zeev Shayer, Djamel Kaoumi |
| On-Site Speaker (Planned) |
Ryan Michael Schoell |
| Abstract Scope |
The fatigue crack behavior of three variations of 304 stainless steel including, commercial 304, 304H (high carbon) and 304L (low carbon) was studied using synchrotron x-ray tomography and diffraction. Fatigue cracks were developed using four-point bending on notched specimens. Smaller single-edged crack specimens were then extracted and subjected to synchrotron x-rays. X-ray tomography based on attenuation contrast showed the formation of fatigue voids in all samples. Some micro voids were elongated in a specific direction. The number density of microvoids was measured in all three samples. Scanning electron microscopy (SEM) of the as-received materials revealed elongated and spherical precipitates/inclusions. X-ray diffraction (XRD) revealed the formation of deformation induced α’-martensite and ε-martensite around the crack. The microstructure found through SEM and XRD was correlated with the crack tomography to understand the differences and similarities in fatigue crack behavior observed in the three materials. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, |