|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Deformation Induced Microstructural Modification
||Tailoring the mechanical performance in novel Zn-Ag-Mg alloy processed by cold plastic deformation processes
||Maria Watroba, Wiktor Bednarczyk, Jakub Kawałko, Terence G. Langdon, Piotr Bała
|On-Site Speaker (Planned)
Zinc and its alloys with potential applications as short-term implants have attracted recently great attention in the developing branch of biomaterials. However, brittleness and low mechanical strength limit their use for load-bearing applications. Zn also suffers other mechanical aspects related to recrystallization at strain rate sensitivity at room temperature. To address these issues a novel Zn-3Ag-0.5Mg alloy was fabricated using three processing paths: hot extrusion (HE), HE followed by cold rolling (CR), and high-pressure torsion (HPT).
The extensive mechanical testing and SEM-EBSD microstructural characterization showed that coarse-grained samples after HE exhibited high strength with brittleness due to dislocation interaction with dispersed precipitates and, to some extent, with twinning activation. Significant grain refinement and processing at room temperature gave an increase in elongation in CR and HPT samples. Ductile CR samples and favorable rolling deformation texture gave mechanical properties meeting the requirements for biodegradable implants, and a reasonable strain rate sensitivity.
||Characterization, Mechanical Properties,