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Novel multicomponent B2-ordered aluminides: Compositional design, synthesis, characterization, and thermal stability

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Watermeyer,  Philipp
Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Liebscher,  Christian
Advanced Transmission Electron Microscopy, Structure and Nano-/ Micromechanics of Materials, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Mohan Muralikrishna, G., Carmel Mary Esther, A., Guruvidyathri, K., Watermeyer, P., Liebscher, C., Kulkarni, K. N., et al. (2020). Novel multicomponent B2-ordered aluminides: Compositional design, synthesis, characterization, and thermal stability. Metals, 10(11): 1411, pp. 1-19. doi:10.3390/met10111411.


Cite as: https://hdl.handle.net/21.11116/0000-0009-2DAD-3
Abstract
For the first time, multicomponent alloys belonging to a B2-ordered single phase were designed and fabricated by melting route. The design concept of high entropy alloys is applied to engineering the transition metal sublattice of binary B2 aluminide. The equiatomic substitution of transition metal elements in the Ni sublattice of binary AlNi followed to produce Al(CoNi), Al(FeNi), Al(CoFe), Al(CoFeNi), Al(CoFeMnNi), and Al(CoCuFeMnNi) multicomponent alloys. CALculation of PHAse Diagrams (CALPHAD) approach was used to predict the phases in these alloys. X-ray diffraction and transmission electron microscopy were used to confirm the B2 ordering in the alloys. Thermal stability of the B2 phase in these alloys was demonstrated by prolonged heat treatments at 1373 K and 1073 K up to 200 h. © 2020 by the author. Licensee MDPI, Basel, Switzerland.