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23-02-2022 | Original Article

Microstructure and magnetic properties evolution of Al/CoCrFeNi nanocrystalline high-entropy alloy composite

Authors: Jun-Jie Wang, Zong-De Kou, Shu Fu, Shang-Shu Wu, Si-Nan Liu, Meng-Yang Yan, Di Wang, Si Lan, Horst Hahn, Tao Feng

Published in: Rare Metals | Issue 6/2022

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Abstract

A systematic microstructure-oriented magnetic property investigation for Al/CoCrFeNi nanocrystalline high-entropy alloys composite (nc-HEAC) is presented. In the initial state, the Al/CoCrFeNi nc-HEAC is composed of face-centered cubic (FCC)-Al, FCC-CoCrFeNi and hexagonal close-packed (HCP)-CoNi phases. High energy synchrotron radiation X-ray diffraction and high-resolution transmission electron microscopy were used to reveal the relationship between microstructure evolution and magnetic mechanism of Al/CoCrFeNi nc-HEAC during heat treatment. At low-temperature annealing stage, the magnetic properties are mainly contributed by the HCP-CoNi phase. With the increase of temperature, the diffusion-induced phase transition process including the transformation of AlCoCrFeNi HEA from FCC to BCC structure and the growth of B2 phase plays a dominant role in the magnetic properties. It was found that the magnetic properties can be effectively regulated through the control of the thermal diffusion process. The nano dual-phase thermal diffusion-induced phase transition behavior of nanocomposites prepared based on laser-IGC technology provides guidance for the diffusion process and microstructure evolution of two phases in composites.

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previous article Tailoring microstructures of CoCrFeNiNb0.25 hypoeutectic high-entropy alloy by hot deformation

next article Anisotropy of microstructures and mechanical properties in FeCoNiCr0.5 high-entropy alloy prepared via selective laser melting

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Title: Microstructure and magnetic properties evolution of Al/CoCrFeNi nanocrystalline high-entropy alloy composite
Authors: Jun-Jie Wang
Zong-De Kou
Shu Fu
Shang-Shu Wu
Si-Nan Liu
Meng-Yang Yan
Di Wang
Si Lan
Horst Hahn
Tao Feng
Publication date: 23-02-2022
Publisher: Nonferrous Metals Society of China
Published in: Rare Metals / Issue 6/2022
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-021-01931-w

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