| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Multiscale Modeling of Fatigue Crack Growth and Environmental Effects |
| Author(s) |
Ting Zhu |
| On-Site Speaker (Planned) |
Ting Zhu |
| Abstract Scope |
Hydrogen embrittlement of metallic materials is a widely observed phenomenon, but it remains a challenge to develop predictive computational modeling for this complex behavior. In this talk, I will focus on an ongoing effort to achieve multiscale modeling of hydrogen-mediated fatigue crack growth in austenitic stainless steel. We have developed an interatomic potential for the Fe-Ni-Cr-H alloy system to perform atomistic simulations of hydrogen and dislocation interactions in stainless steel. We have also formulated a cyclic crystal plasticity model, taking guidance from atomistic reaction pathway modeling of dislocation mobility. Our crystal plasticity finite element simulations have revealed the effects of grain-level plastic deformation on fatigue crack growth. Finally, I will discuss challenges and opportunities for predictive multiscale modeling of hydrogen embrittlement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Environmental Effects, Modeling and Simulation |