New lightweight and super-hard refractory high-entropy alloys developed by a high-throughput method

Xudong Huang; Ruitao Qu; Faling Ren; Chao Guo; Yuan Xing; Haotian Ma; Yuwen Lin; Jiaming Liu; Kexing Song; Feng Liu

Journal of Materials Research and Technology (Jul 2024)

New lightweight and super-hard refractory high-entropy alloys developed by a high-throughput method

Xudong Huang,
Ruitao Qu,
Faling Ren,
Chao Guo,
Yuan Xing,
Haotian Ma,
Yuwen Lin,
Jiaming Liu,
Kexing Song,
Feng Liu

Affiliations

Xudong Huang: Queen Mary University of London Engineering School, Northwestern Polytechnical University, No. 1, Dongxiang Road, Xi'an, 710129, China
Ruitao Qu: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China; Corresponding author.
Faling Ren: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China
Chao Guo: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China
Yuan Xing: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China
Haotian Ma: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China
Yuwen Lin: Queen Mary University of London Engineering School, Northwestern Polytechnical University, No. 1, Dongxiang Road, Xi'an, 710129, China
Jiaming Liu: School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK
Kexing Song: Institute of Materials, Henan Academy of Sciences, 266-38 Mingli Road, Zhengzhou, 450046, China
Feng Liu: State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, 710072, China; Corresponding author.

Journal volume & issue: Vol. 31
pp. 506 – 511

Abstract

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Lightweight refractory high-entropy alloy (LRHEA) is one of potential structural materials in aerospace industry for its excellent high-temperature comprehensive properties and low density. In this work, a new high-throughput method to develop LRHEAs was proposed. The equimolar HfNbTaTiZr alloy was immersed with melting pure aluminum for a given time, and a thick layer with composition gradient was obtained. Further characterizations of the layer result in relations between composition and nanohardness or Young's modulus, which facilitate the selection of the optimal composition with desired properties. Finally, three LRHEAs were designed and casted into bulk samples with arc-melting method. The alloys show superhigh Vickers hardness of 8.29–9.56 GPa and low densities of 6.27–7.08 g/cm3, showing great potentials in applications as wear-resistant materials. The high-throughput method developed here may also accelerate the development of new LRHEAs.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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