Corrosion of high entropy alloys

By Y. Qiu, Sebastian Thomas, M. Gibson, H. Fraser, Nick Birbilis. npj Materials Degradation, 2017

529 citations recorded by the source corpus.

High entropy alloys represent a unique class of metal alloys, comprising nominally five or more elements in near equiatomic proportions. High entropy alloys have gained significant interest on the basis that the high configurational entropy of such alloy systems is purported to result in a single-phase solid solution structure. While such a single-phase structure can occur in unique systems, it is now appreciated that the definition of high entropy alloys can be broader, with systems comprising only four elements possible of forming single phases, and most five (or more) element systems actually being multi (>2) phases. To this end, the notion of compositionally complex alloys is a more general description, with the concise review herein focusing on the corrosion of compositionally complex alloys (inclusive of high entropy alloys). It is noted that generally, in spite of complex compositions and in many cases complicated microstructural heterogeneity, compositionally complex alloys are nominally corrosion-resistant. This is discussed and aspects of the status and needs are presented.

Subfields: Aerospace Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/e8c5e54d00e640de9b749288b925288cb1b13651

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In Aerospace Engineering

1. Mathilde Laurent-Brocq
2. L. Perrière
3. I. Guillot

In Mechanical Engineering

1. Mathilde Laurent-Brocq
2. S. Zanna
3. L. Perrière
4. P. Marcus
5. I. Guillot

Citations in the corpus

• Ab initio phase stabilities and mechanical properties of multicomponent alloys: A comprehensive review for high entropy alloys and compositionally complex alloys (2019, unknown): “[29] Corrosion of high entropy alloys 15”
• Study of the surface oxides and corrosion behaviour of an equiatomic CoCrFeMnNi high entropy alloy by XPS and ToF-SIMS (2020, methodology): “The characteristic high resolution XPS 2p core level spectra obtained for a native oxide film formed on the equiatomic CoCrFeMnNi HEA are presented on Fig.1(b)-(f).”