Microstructure, Corrosion Behaviour and Microhardness of Non-equiatomic Fe1.5CoNiCrCu x (0.5 ≤ x ≤ 2.0) High-Entropy Alloys

Man Zhu; Kun Li; Yongqin Liu; Zhijun Wang; Lijuan Yao; Yang Fa; Zengyun Jian

doi:10.1007/s12666-019-01850-6

Microstructure, Corrosion Behaviour and Microhardness of Non-equiatomic Fe_1.5CoNiCrCu_x (0.5 ≤ x ≤ 2.0) High-Entropy Alloys

Man Zhu, Kun Li, Yongqin Liu, Zhijun Wang, Lijuan Yao, Yang Fa, Zengyun Jian

School of Materials Sience and Engineering

Xi'an Technological University

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The microstructure, electrochemical corrosion behaviour and microhardness of Fe_1.5CoNiCrCu_x (x = 0.5, 1.0, 1.5 and 2.0) high-entropy alloys (HEAs) were investigated by X-ray diffraction (XRD), scanning electron microscopy and an electrochemical workstation. The XRD spectra of Fe_1.5CoNiCrCu_x HEAs confirmed the face-centred cubic solid solution structure and that all specimens consisted of an fcc matrix and a Cu-rich fcc phase. The results of electrochemical corrosion tests showed that Fe_1.5CoNiCrCu_0.5 HEAs exhibited low corrosion rates owing to their high corrosion potential and low corrosion current density. The major types of corrosion for Fe_1.5CoNiCrCu_x HEAs belong to localised corrosion and pitting, which is attributed to Cu-rich and Cr-depleted phases in the interdendritic region. The microhardness of Fe_1.5CoNiCrCu_x HEAs increases from 142 HV for alloys with x = 0.5 to 190 HV for alloys with x = 2.0.

Original language	English
Pages (from-to)	389-397
Number of pages	9
Journal	Transactions of the Indian Institute of Metals
Volume	73
Issue number	2
DOIs	https://doi.org/10.1007/s12666-019-01850-6
State	Published - 1 Feb 2020

Keywords

Corrosion properties
FeCoNiCrCu
High-entropy alloy
Microhardness
Microstructure

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title = "Microstructure, Corrosion Behaviour and Microhardness of Non-equiatomic Fe1.5CoNiCrCu x (0.5 ≤ x ≤ 2.0) High-Entropy Alloys",

abstract = "The microstructure, electrochemical corrosion behaviour and microhardness of Fe1.5CoNiCrCux (x = 0.5, 1.0, 1.5 and 2.0) high-entropy alloys (HEAs) were investigated by X-ray diffraction (XRD), scanning electron microscopy and an electrochemical workstation. The XRD spectra of Fe1.5CoNiCrCux HEAs confirmed the face-centred cubic solid solution structure and that all specimens consisted of an fcc matrix and a Cu-rich fcc phase. The results of electrochemical corrosion tests showed that Fe1.5CoNiCrCu0.5 HEAs exhibited low corrosion rates owing to their high corrosion potential and low corrosion current density. The major types of corrosion for Fe1.5CoNiCrCux HEAs belong to localised corrosion and pitting, which is attributed to Cu-rich and Cr-depleted phases in the interdendritic region. The microhardness of Fe1.5CoNiCrCux HEAs increases from 142 HV for alloys with x = 0.5 to 190 HV for alloys with x = 2.0.",

keywords = "Corrosion properties, FeCoNiCrCu, High-entropy alloy, Microhardness, Microstructure",

author = "Man Zhu and Kun Li and Yongqin Liu and Zhijun Wang and Lijuan Yao and Yang Fa and Zengyun Jian",

note = "Publisher Copyright: {\textcopyright} 2019, The Indian Institute of Metals - IIM.",

year = "2020",

month = feb,

day = "1",

doi = "10.1007/s12666-019-01850-6",

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TY - JOUR

T1 - Microstructure, Corrosion Behaviour and Microhardness of Non-equiatomic Fe1.5CoNiCrCu x (0.5 ≤ x ≤ 2.0) High-Entropy Alloys

AU - Zhu, Man

AU - Li, Kun

AU - Liu, Yongqin

AU - Wang, Zhijun

AU - Yao, Lijuan

AU - Fa, Yang

AU - Jian, Zengyun

PY - 2020/2/1

Y1 - 2020/2/1

N2 - The microstructure, electrochemical corrosion behaviour and microhardness of Fe1.5CoNiCrCux (x = 0.5, 1.0, 1.5 and 2.0) high-entropy alloys (HEAs) were investigated by X-ray diffraction (XRD), scanning electron microscopy and an electrochemical workstation. The XRD spectra of Fe1.5CoNiCrCux HEAs confirmed the face-centred cubic solid solution structure and that all specimens consisted of an fcc matrix and a Cu-rich fcc phase. The results of electrochemical corrosion tests showed that Fe1.5CoNiCrCu0.5 HEAs exhibited low corrosion rates owing to their high corrosion potential and low corrosion current density. The major types of corrosion for Fe1.5CoNiCrCux HEAs belong to localised corrosion and pitting, which is attributed to Cu-rich and Cr-depleted phases in the interdendritic region. The microhardness of Fe1.5CoNiCrCux HEAs increases from 142 HV for alloys with x = 0.5 to 190 HV for alloys with x = 2.0.

AB - The microstructure, electrochemical corrosion behaviour and microhardness of Fe1.5CoNiCrCux (x = 0.5, 1.0, 1.5 and 2.0) high-entropy alloys (HEAs) were investigated by X-ray diffraction (XRD), scanning electron microscopy and an electrochemical workstation. The XRD spectra of Fe1.5CoNiCrCux HEAs confirmed the face-centred cubic solid solution structure and that all specimens consisted of an fcc matrix and a Cu-rich fcc phase. The results of electrochemical corrosion tests showed that Fe1.5CoNiCrCu0.5 HEAs exhibited low corrosion rates owing to their high corrosion potential and low corrosion current density. The major types of corrosion for Fe1.5CoNiCrCux HEAs belong to localised corrosion and pitting, which is attributed to Cu-rich and Cr-depleted phases in the interdendritic region. The microhardness of Fe1.5CoNiCrCux HEAs increases from 142 HV for alloys with x = 0.5 to 190 HV for alloys with x = 2.0.

KW - Corrosion properties

KW - FeCoNiCrCu

KW - High-entropy alloy

KW - Microhardness

KW - Microstructure

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U2 - 10.1007/s12666-019-01850-6

DO - 10.1007/s12666-019-01850-6

M3 - 文章

AN - SCOPUS:85075911587

SN - 0019-493X

VL - 73

SP - 389

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JO - Transactions of the Indian Institute of Metals

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ER -

Microstructure, Corrosion Behaviour and Microhardness of Non-equiatomic Fe_1.5CoNiCrCu_x (0.5 ≤ x ≤ 2.0) High-Entropy Alloys

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