About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Biomaterials and Implants
|
| Presentation Title |
Influence of Ag Content on the Microstructure, Mechanical Performance, and Degradation Behavior of Hot-Extruded Zn-0.8Cu-0.6Mn-0.02Mg Alloys for Biomedical Applications |
| Author(s) |
Bashir Ahamed, Jaroslaw W. Drelich, H.R. Bakhsheshi-Rad, Md Tanvir Hossain |
| On-Site Speaker (Planned) |
Bashir Ahamed |
| Abstract Scope |
Zinc-based alloys are promising candidates for biodegradable cardiovascular implants; however, their mechanical performance and degradation behavior require further optimization. This study investigated the effect of Ag content on the microstructure, mechanical properties, and corrosion behavior of hot-extruded Zn-0.8Cu-0.6Mn-(0.02-0.04) Mg alloys containing 1-4 wt.% Ag. Increasing Ag content progressively refined the grain structure, reducing the average extruded grain size from ~14 to ~7 µm. Microstructural analysis also showed an increasing fraction of Ag-rich secondary phases with increasing Ag content. The ultimate tensile strength increased from 397 MPa at 1 wt.% Ag to 416 MPa at 4 wt.% Ag, while elongation remained within 3-6%. In contrast, corrosion resistance decreased, as the corrosion current density increased from 29 to 113 µA/cm2 and the corrosion rate from 0.4 to 1.7 mm/yr. These results highlight the need to optimize Ag content to balance mechanical strength and degradation behavior for biodegradable Zn-based implant applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Biomaterials, Mechanical Properties, Characterization |