Fundamental design strategies for advancing the development of high entropy alloys for thermo-mechanical application: A critical review

Nearly three decades since the discovery of high entropy alloys (HEAs), it has greeted a broad interest in the field of materials research as a better alternative to conventional alloy materials due to the exceptional combinatorial properties they offer in terms of lightweight, high-specific strengt...

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Bibliographic Details
Published in:	Journal of materials research and technology Vol. 27; pp. 4833 - 4860
Main Authors:	Anamu, U.S., Ayodele, O.O., Olorundaisi, E., Babalola, B.J., Odetola, P.I., Ogunmefun, A., Ukoba, K., Jen, T.-C., Olubambi, P.A.
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-11-2023 Elsevier
Subjects:	Fabrication processes High-entropy alloys Intermetallics Materials' properties Phase diagram calculations Theoretical calculations Phase diagram calculations High-entropy alloys Intermetallics Materials' properties Theoretical calculations Fabrication processes
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Summary:	Nearly three decades since the discovery of high entropy alloys (HEAs), it has greeted a broad interest in the field of materials research as a better alternative to conventional alloy materials due to the exceptional combinatorial properties they offer in terms of lightweight, high-specific strength in elevated temperatures, excellent oxidation and corrosion resistance properties (among others). Leveraging on the “four core effects”: high-entropy effect, sluggish/hysteretic diffusion effect, severe-lattice-distortion effect and cocktail effect which define the special features responsible for their outstanding properties, HEAs have been successfully employed for high-temperature applications in automobile and in the aerospace. An emerging sub-field of HEAs is the incorporation of a secondary strengthening phase that can be provided by the precipitation of intermetallic (IM) compounds to enhance the microstructure which will concomitantly affect the properties of a material (thermal, chemical and mechanical properties) for broader engineering applications. In this article, design concepts brewed from thermo-physical parameters calculation and computational thermodynamics using a CALPHAD-based tool were reviewed as fundamental design strategies in the development of IM-containing HEAs.
ISSN:	2238-7854
DOI:	10.1016/j.jmrt.2023.11.008