|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||ζ-factor Quantitative Chemical Microanalysis of Multi-phase Complex Concentrated Alloys
||Christopher J. Marvel, Joshua A Smeltzer, Anit K Giri, B Chad Hornbuckle, Kristopher A Darling, Martin P Harmer
|On-Site Speaker (Planned)
||Christopher J. Marvel
Complex concentrated alloys (CCA) have intricate and oftentimes unpredictable microstructures, and depending on the processing procedures conducted to synthesize CCA like mechanical alloying, there is a high probability that the multi-phase microstructures will consist of both ceramic and metallic phases. To best correlate microstructure to properties, there is a need to confidently identify microstructural phases. This talk will introduce and demonstrate that ζ-factor microanalysis, a quantitative transmission electron microscopy (TEM) energy dispersive spectroscopy (EDS) framework which non-trivially corrects for X-ray absorption, is a powerful tool to correlate microstructure to properties, especially when used in tandem with aberration-corrected atomic-resolution imaging. ζ-factor microanalysis is specifically demonstrated to characterize a nanostructured mechanically alloyed refractory CCA that includes ceramic nitride phases. Overall, ζ-factor microanalysis enabled full phase identification which would otherwise been difficult due to severe X-ray absorption of nitrogen K-line X-rays. Other potential uses and practical aspects of ζ-factor microanalysis will be presented.