Novel Multicomponent B2-Ordered Aluminides: Compositional Design, Synthesis, Characterization, and Thermal Stability

Muralikrishna, G. Mohan and Esther, A. Carmel Mary and Guruvidyathri, K. and Watermeyer, Philipp and Murty, B S (2020) Novel Multicomponent B2-Ordered Aluminides: Compositional Design, Synthesis, Characterization, and Thermal Stability. Metals, 10 (11). pp. 1-19. ISSN 2075-4701

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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.

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IITH Creators:

IITH Creators	ORCiD
Murty, B S	https://orcid.org/0000-0002-4399-8531

Item Type:

Article

Additional Information:

Acknowledgments: G.M.M. is grateful to the German academic exchange service (DAAD) for awarding a fellowship to conduct experiments at the University of Münster, Germany. A.C.M.E. would like to thank the Alexander von Humboldt (AvH) foundation in Germany for awarding a fellowship. A partial financial support from the German Science Foundation (DFG), project number DI 1419/11-1 and LI 2133/4-1, was acknowledged.

Uncontrolled Keywords:

Aluminide; B2; CALPHAD; High entropy alloys; HRTEM; Intermetallic compound; Multicomponent alloys; Phase diagrams; Thermal stability

Subjects:

Others > Metallurgy Metallurgical Engineering

Divisions:

Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Nov 2022 12:27

Last Modified:

23 Nov 2022 12:27