| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology 2025
|
| Presentation Title |
Effects of Zn and Ca microalloying on β-series precipitation in Mg-Nd alloys a comparison of electron microscopy and small-angle scattering techniques |
| Author(s) |
Janet M. Meier, Jiashi Miao, Lisa DeBeer-Schmitt, Jan Ilavsky, Alan Luo |
| On-Site Speaker (Planned) |
Janet M. Meier |
| Abstract Scope |
In Mg-Nd alloys, most of the strengthening is provided by a combination of the βʹʹʹ and β1 precipitation. In this work, the effects of Zn and Ca microalloying additions on β-series precipitation were studied using small-angle/ultra small-angle X-ray scattering (SAXS/USAXS) techniques in combination with scanning transmission electron microscopy (STEM). It is found that Zn additions promote the formation of fine β1 precipitates during the early stages of aging, leading to an increase in peak-hardness with aging at 200°C. On the other hand, Ca additions result in the formation of larger βʹʹʹ and β1 precipitates, which provide a lower age-hardening response and accelerate over-aging. The STEM observations in this work were then used to extract the bulk precipitation behavior from the SAXS measurements. We will also discuss the methods and considerations for modeling the multiple precipitate populations in SAXS data from metallurgical samples. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnesium, Characterization, Phase Transformations |