| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Biomaterials for Biomedical Implants
|
| Presentation Title |
The Stress-corrosion-cracking Resistance of Zinc-based Alloys Designed for Bioresorbable Medical Implants |
| Author(s) |
Morteza Shaker Ardakani, Henry Summers, Stephen L Kampe, Jaroslaw W Drelich |
| On-Site Speaker (Planned) |
Henry Summers |
| Abstract Scope |
Zinc-based alloys are a new class of bioresorbable metals being investigated for medical implant applications. Despite some success in utilizing variations in composition and thermomechanical processing protocol to achieve acceptable combinations of strength and ductility, some concerns remain regarding the deterioration of these mechanical properties when placed in the human body. This study characterized the stress corrosion cracking of a hot-extruded quaternary Zn-Cu-Mn-Zr alloy in a modified Hanks’ balanced salt solution. Three different microstructural regimes including as-extruded, solution-annealed, and sensitized were selected to examine the effect of intermetallic phase fraction at the grain boundaries on stress corrosion cracking. This study shows that intermetallics at the grain boundaries of the quaternary Zn-Cu-Mn-Zr alloy impede the intergranular fracture. The results of this study also indicate that the extruded Zn-based alloy compared with Mg-based alternatives have a minor sensitivity to stress corrosion cracking. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Mechanical Properties, Other |