Near-surface self-resistance hydrogen effect of eutectic high-entropy alloy AlCoCrFeNi2.1

Daochen Feng; Minghui Hu; Wenjian Zheng; Yu Wang; Yinghe Ma; Sendong Ren; Dapeng Tan; Jianguo Yang

Journal of Materials Research and Technology (Jul 2024)

Near-surface self-resistance hydrogen effect of eutectic high-entropy alloy AlCoCrFeNi2.1

Daochen Feng,
Minghui Hu,
Wenjian Zheng,
Yu Wang,
Yinghe Ma,
Sendong Ren,
Dapeng Tan,
Jianguo Yang

Affiliations

Daochen Feng: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China; Engineering Research Center of Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology, Hangzhou, 310023, China
Minghui Hu: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China
Wenjian Zheng: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China; Engineering Research Center of Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology, Hangzhou, 310023, China; Corresponding author. School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China.
Yu Wang: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China
Yinghe Ma: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China; Engineering Research Center of Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology, Hangzhou, 310023, China
Sendong Ren: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China; Engineering Research Center of Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology, Hangzhou, 310023, China
Dapeng Tan: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China
Jianguo Yang: School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou, 310023, China; Engineering Research Center of Process Equipment and Remanufacturing, Ministry of Education, Zhejiang University of Technology, Hangzhou, 310023, China

Journal volume & issue: Vol. 31
pp. 472 – 480

Abstract

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A series of engineering application studies related to hydrogen damage has been carried out for the eutectic high-entropy alloy (HEA) AlCoCrFeNi2.1 with excellent comprehensive properties. This work mainly introduces the element segregation and microstructure evolution phenomenon near the surface phase boundary and around the precipitated phase found in the hydrogen damage experiment of the material. Studies have shown that the evolution of the near-surface phase boundary microstructure of HEAs caused by hydrogen charging has a great influence on the hydrogen trap density inside the alloy. The “self-resistance hydrogen effect” is produced, that is, hydrogen-induced microstructure evolution causes the effect of delayed hydrogen diffusion. In this phenomenon, the synergy between hydrogen atoms and vacancies and dislocations on the alloy surface is crucial.

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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