| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
In-situ Diffraction Studies of the Fatigue-crack-growth Behavior in a TRIP-assisted Advanced High Strength Steel |
| Author(s) |
Di Xie, Yi Yang, Lu Huang, Yang Ren, Yanfei Gao |
| On-Site Speaker (Planned) |
Yanfei Gao |
| Abstract Scope |
Steels assisted by transformation-induced plasticity (TRIP) have been developed and attracted great attention. To date, the roles of alloy design and martensite transformation kinetics on fatigue behavior are mostly investigated through post-mortem metallographic characterizations, which result in the limited information to quantify the contributions of the TRIP effect into fatigue resistance. The occurrence of phase transformation from the retained austenite into martensite in the plastic zone ahead of the crack may lead to the crack closure and reduce the fatigue crack growth rate. In this work, we exploit in-situ synchrotron X-ray diffraction to provide the high-resolution strain mapping near a fatigue tip in the TRIP-assisted XG-3 steel with both high-spatial and strain resolution. These in-situ, nondestructive measurements can yield information about phase transformation and lattice strains, which will allow us to bridge the gap between microscopic failure processes and macroscopic fatigue crack growth properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Phase Transformations, Other |