| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
High Entropy Materials: Concentrated Solid Solution, Intermetallics, Ceramics, Functional Materials and Beyond
|
| Presentation Title |
ζ-Factor Microanalysis, a Quantitative Chemical Analysis Technique for the Characterization of High Entropy Alloys |
| Author(s) |
Christopher J Marvel, Joshua A. Smeltzer, Anit Giri, B. Chad Hornbuckle , Kristopher A. Darling, Martin P Harmer |
| On-Site Speaker (Planned) |
Joshua A. Smeltzer |
| Abstract Scope |
Mechanical alloying is an effective method to synthesize nanostructured HEAs that exhibit impressive properties. One caveat, however, is that metallic glass is often formed during high-energy synthesis and it is difficult to confidently predict which phases will form after re-crystallization. Inevitable introduction of light element impurities during the milling process is another practical complication for phase prediction. In an effort to develop quantitative techniques to best identify phases in nanostructured HEAs, this talk will introduce and demonstrate that ζ-factor microanalysis, a transmission electron microscopy (TEM) energy dispersive spectroscopy (EDS) framework, is a powerful tool to correlate microstructure to properties, especially when used in tandem with aberration-corrected atomic-resolution imaging. Here, a nanostructured mechanically alloyed refractory HEA was studied, which contained a variety of unpredictable yet important impurity phases regarding microhardness. Overall, ζ-factor microanalysis enabled full phase identification which would otherwise have been difficult due to severe X-ray absorption. |