Diffusion in ultra-fine-grained CoCrFeNiMn high entropy alloy processed by equal-channel angular pressing

被引：0

作者：

Yao Jiang

Yuwei Liu

Hongbo Zhou

Shabnam Taheriniya

Baixue Bian

Lukasz Rogal

Jing Tao Wang

Sergiy Divinski

Gerhard Wilde

机构：

[1] Nanjing University of Science and Technology,School of Material Science and Engineering

[2] University of Münster,Institute of Materials Physics

[3] Polish Academy of Sciences,Institute of Metallurgy and Materials Science

[4] Herbert Gleiter Institute of Nanoscience,undefined

[5] Nanjing University of Science and Technology,undefined

来源：

Journal of Materials Science | 2024年 / 59卷

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D O I：

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学科分类号：

摘要：

Grain boundary diffusion in severely plastically deformed (SPD) CoCrFeMnNi high entropy alloy (HEA) has been studied by applying the tracer diffusion technique. After two passes of equal channel angular pressing (ECAP), three untra-fast diffusion paths in ECAP-processed CoCrFeMnNi HEA were distinguished, which were identified with twin boundaries, high-angle grain boundaries and porosity defects. The enhanced diffusivity is induced by a high strain localization in the vicinity of interfaces in a deformation-induced non-equilibrium state that is correlated with the pronounced deformation twinning due to the low stacking fault energy of the material.

引用

页码：5805 / 5817

页数：12

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