| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
Phase File Modelling of Environmentally Assisted Cracking of Bioabsorbable Mg Alloys for Biomedical Applications |
| Author(s) |
Sasa Kovacevic, Wahaaj Ali, Emilio Martínez-Pañeda, Javier Llorca |
| On-Site Speaker (Planned) |
Javier Llorca |
| Abstract Scope |
Bioabsorbable Mg alloys are currentlyconsidered for biomedical devices that gradually disappear with time and neither hinder the natural tissue growth nor require a second surgery for removal. Degradation of bioabsorbable materials should take place at a speed compatible with the growth of natural tissue and is important to develop simulation tools to assess the evolution of the corrosion and the corresponding degradation in mechanical properties.
Mg corrosion was simulated using a phase-field model that incorporates both Mg dissolution and the transport of Mg ions in solution, naturally predicting the transition from activation-controlled to diffusion-controlled bio-corrosion. The phase field-framework also captures pitting corrosion and accounts for the synergistic effect of aggressive environments and mechanical loading in accelerating corrosion kinetics. The simulations results were validated against tests in Mg wires and examples of application of the phase field model to assess the degradation of Mg stents are presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Environmental Effects, Magnesium |