|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||Thin Film Approach to Optimize Structure and Composition of High Entropy Alloys
||Azin Akbari, Artashes Ter-Isahakyan, Julia Lehmann, Thomas John Balk
|On-Site Speaker (Planned)
In this study, a thin film approach was applied to the development of high entropy alloys (HEAs). Two nominal HEA compositions, OsRuWCoIr and CoCrFeMnNiCu, were selected to obtain hexagonal close packed (HCP) and face centered cubic (FCC) HEAs, respectively. Thin film samples were prepared by simultaneous magnetron sputtering of elements onto silicon wafer substrates. This arrangement yielded a chemical composition gradient in the films. The gradient in composition resulted in formation of various phases, some of which exhibited the desired single-phase HEA, albeit with non-stoichiometric compositions. Microstructure of thin film samples was characterized via scanning electron microscopy and energy dispersive x-ray spectroscopy. Single-phase FCC and HCP regions were detected in the alloys by electron backscattered diffraction analysis. These results were used as the basis for identifying optimized bulk HEAs for investigation in another study.
||Planned: A print-only volume