Article | REF: RE269 V1

High entropy multi-component alloys - Concepts, microstructures and mechanical properties

Authors: Mathilde LAURENT-BROCQ, Jean-Philippe COUZINIÉ

Publication date: December 10, 2017, Review date: November 25, 2020

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6. Balance sheet

6.1 Strengths and special features

High entropy alloys (HEA) are multi-component alloys in which each element is highly concentrated. The distinction between majority and minority elements is therefore no longer valid. AHEs can be single-phase, i.e. form a single crystalline solid solution in which each element is highly concentrated, or multi-phase, i.e. be composed of a solid solution, similar to that of single-phase AHEs, and secondary phase(s). AHEs offer several advantages:

  • solid solutions are thermodynamically stable at high temperatures;

  • they can be produced by conventional metallurgical processes, so industrial quantities are possible;

  • their mechanical properties...

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Balance sheet