Journal
SCRIPTA MATERIALIA
Volume 121, Issue -, Pages 1-4Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.04.017
Keywords
High entropy alloys; High resolution electron microscopy; Electron tomography; Phase transformations; Ordered compounds
Categories
Funding
- Dayton Area Graduate Studies Institute (DAGSI) program of the State of Ohio
- Air Force Research Laboratory [RX0(1)-OSU-13-4]
- Air Force on-site [FA8650-15-D-5230]
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Electron microscopy, X-ray energy dispersive spectroscopy, and tomographic reconstructions were used to characterize a high entropy alloy predominantly composed of refractory elements. The intragranular microstructure was found to consist of a periodic two phase mixture, where a disordered bcc phase is aligned orthogonally in an ordered B2 phase. The phases were found to exhibit continuous lattice registry and an orientation relationship given by < 100 >(bcc)//< 100 >(B2), {001}(bcc)//{001}(B2). X-ray energy dispersive spectroscopy was used to determine the compositions of the phases, and spectral images were used in the tomographic reconstruction of the alloy to reveal the morphology and the elemental partitioning between phases. (C) 2016 Elsevier Ltd. All rights reserved.
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