Research progress on microstructure and properties of BCC/B2-based refractory high entropy alloys

doi:10.13251/j.issn.0254-6051.2025.04.002

Abstract

Abstract: Refractory high entropy alloys, as complex-composition alloys with simple crystalline structures, consist of a mixture of early transition metals with high melting points. The refractory high-entropy alloy systems are classified based on the compositional characteristics, and the composition, phase constituents, microstructure and multiple properties (mechanical and functional) are reviewed in detail. Most of the refractory high entropy alloys are BCC/B2-based alloys and possess excellent mechanical properties, good irradiation resistance, prominent oxidation resistance, damping capability, energetic performance and so on, showing great potential for application as structural-functional integrated materials, and are expected to be applied in the fields of nuclear reactor, aerospace, energy and chemical industry and machinery and electronics. Particularly, some refractory high entropy alloys show great value for high-temperature applications due to the high melting point, excellent high-temperature microstructural stability and high-temperature mechanical properties. Finally, the main problems and challenges faced by refractory high entropy alloys are introduced, and the prospects for their development and application are prospected.

Key words: refractory high entropy alloys, composition design, microstructure, property modulation

CLC Number:

TG132.3⁺2

Wang Zhenhua, Liu Haiyang, Wang Rui, Gao Zhi, Tang Lina, Wang Qing. Research progress on microstructure and properties of BCC/B2-based refractory high entropy alloys[J]. Heat Treatment of Metals, 2025, 50(4): 9-18.

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