| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2020
|
| Presentation Title |
Microstructure Evolution and Precipitation Strengthening in Ca-containing Mg-rare Earth Alloys |
| Author(s) |
Qianying Shi, Bruce Williams, John E Allison |
| On-Site Speaker (Planned) |
Qianying Shi |
| Abstract Scope |
The significant precipitation strengthening during aging provides Mg-rare earth (RE) alloys exceptional strength. The low density and reasonable cost of Ca could favor Mg alloys for commercial use with improved properties. Our goal is to investigate the potential interaction effect of Ca for improving the aging response and strength of Mg-RE alloys. In this study, 0.5wt.% and 1.0wt.% Ca were added to the ternary alloy Mg-2wt.%Nd-4wt.%Y. The microstructures of different conditions were characterized by DSC, SEM, EPMA, TEM and APT techniques. The microstructure evolution and phase transformations were also determined by commercial CALPHAD software. Vickers hardness tests were performed to compare aging response of different alloys. Current results showed that 0.5wt.%Ca addition is able to accelerate peak aging. The results from this study lay the groundwork for the strength prediction in a quaternary Mg-alloy system using a multi-scale optimization framework which is currently under development within the PRISMS Center. |
| Proceedings Inclusion? |
Planned: |