| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
2024 Graduate Student Poster Contest
|
| Presentation Title |
SPG-49: Phase Field Modeling of Complex Pit Morphology, Mechanical loading, and electrochemical process in Anisotropic Material |
| Author(s) |
Christian Chukwudi Mathew, Yao Fu |
| On-Site Speaker (Planned) |
Christian Chukwudi Mathew |
| Abstract Scope |
This work demonstrates a phase field model for simulating activation- and diffusion-controlled pitting stress corrosion cracking (SCC) in metallic materials using the Multiphysics Object-Oriented Simulation Environment framework. The model incorporates an auxiliary phase field variable to describe the free energy interaction between the metal and electrolyte, allowing for the derivation of equations governing the evolution of each field variable. These equations ensure a decrease in system free energy during mass transfer and metal dissolution. By solving the phase field variable, intricate morphological changes are approximated. Calibration of the interface kinetics parameter with exchange current density enables replication of the polarization curve's activation-controlled, diffusion-controlled, and mixed-controlled segments. The model also addresses interactions among multiple pits and varying pit shapes, demonstrating its accuracy and effectiveness in simulating complex pitting corrosion phenomena. |