About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
8th World Congress on Integrated Computational Materials Engineering (ICME 2025)
|
Presentation Title |
Mean-Field Modeling of Precipitation in Mg-Zn-Ca(-Ag) Alloys: Insights Into Ageing and Strengthening Mechanisms |
Author(s) |
Yanheng Xie, Magnus Anderson, Claire Utton, Miguel Espadero, Dikai Guan, Matthew Murphy, Hector Basoalto |
On-Site Speaker (Planned) |
Miguel Espadero |
Abstract Scope |
Mg-Zn-Ca(-Ag) alloys exhibit excellent mechanical properties and biodegradability, making them promising candidates for biomedical applications. The addition of Ag can further enhance precipitation strengthening by refining the distribution and kinetics of Mg-Zn secondary phases. This study investigates the effects of solidification and heat treatment on Mg-3Zn-0.2Ca and its Ag-containing variants. Scheil solidification model is used to simulate the formation of intermetallic compounds, while the mean-field precipitation model predicts the evolution of secondary precipitate particles during ageing. Additionally, a dislocation bowing model is employed to describe the influence of precipitate evolution on mechanical properties. Experimental validation through EDX, EBSD, and mechanical testing characterises microstructure and mechanical performance. Results indicate that Ag addition accelerates precipitate formation and ageing response. These findings provide insights into optimising alloy composition and heat treatment to balance strength and microstructural stability, contributing to the development of Mg-Zn-Ca(-Ag) alloys for lightweight and biomedical applications. |
Proceedings Inclusion? |
Undecided |