About this Abstract |
Meeting |
2022 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 widely observed, but remains a challenge for predictive computational modeling. This talk is focused on an ongoing effort toward the multiscale modeling of hydrogen-mediated fatigue crack growth in austenitic stainless steel. An interatomic potential of the Fe-Ni-Cr-H alloy system was developed to enable the atomistic simulations of hydrogen and dislocation interactions in stainless steel. A cyclic crystal plasticity model was formulated with guidance from the atomistic reaction pathway modeling of dislocation mobility. Our crystal plasticity finite element simulations revealed the effect of crystal-level plastic deformation on fatigue crack growth. Further challenges and opportunities on predictive multiscale modeling of hydrogen embrittlement will be discussed. |
Proceedings Inclusion? |
Planned: |