About this Abstract |
Meeting |
2025 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 |
Environmentally induced 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 |
Environmental Effects, Modeling and Simulation, Mechanical Properties |