Effect of Al addition on the microstructure, mechanical and wear properties of TiZrNbHf refractory high entropy alloys

Vipul Bhardwaj; Qing Zhou; Fan Zhang; Weichao Han; Yin Du; Ke Hua; Haifeng Wang

doi:10.1016/j.triboint.2021.107031

Effect of Al addition on the microstructure, mechanical and wear properties of TiZrNbHf refractory high entropy alloys

Vipul Bhardwaj, Qing Zhou, Fan Zhang, Weichao Han, Yin Du, Ke Hua, Haifeng Wang

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

167 Scopus citations

Abstract

A series of Al_xTiZrNbHf refractory high entropy alloys (RHEAs) were prepared to investigate the mechanical and wear properties. Despite the different crystal structures of each constituent, the RHEAs exhibited body centered cubic (BCC) phase structures as revealed by X-ray diffraction and transmission electron microscopy. Along with the primary BCC phase, another ordered BCC phase appeared in AlTiZrNbHf, being supported by a high negative mixing enthalpy (<−16.28 kJ-mol⁻¹) and a low valence electron concentration (< 4.04). The improved mechanical properties and wear resistance by the Al addition are ascribed to severe lattice distortion and second phase strengthening. These findings highlight significant alterations in the microstructure, mechanical and wear properties with the Al addition, which are beneficial to the design of alloys for wear applications.

Original language	English
Article number	107031
Journal	Tribology International
Volume	160
DOIs	https://doi.org/10.1016/j.triboint.2021.107031
State	Published - Aug 2021

Keywords

Mechanical properties
Microstructure
Refractory high entropy alloys
Wear properties

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10.1016/j.triboint.2021.107031

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title = "Effect of Al addition on the microstructure, mechanical and wear properties of TiZrNbHf refractory high entropy alloys",

abstract = "A series of AlxTiZrNbHf refractory high entropy alloys (RHEAs) were prepared to investigate the mechanical and wear properties. Despite the different crystal structures of each constituent, the RHEAs exhibited body centered cubic (BCC) phase structures as revealed by X-ray diffraction and transmission electron microscopy. Along with the primary BCC phase, another ordered BCC phase appeared in AlTiZrNbHf, being supported by a high negative mixing enthalpy (<−16.28 kJ-mol−1) and a low valence electron concentration (< 4.04). The improved mechanical properties and wear resistance by the Al addition are ascribed to severe lattice distortion and second phase strengthening. These findings highlight significant alterations in the microstructure, mechanical and wear properties with the Al addition, which are beneficial to the design of alloys for wear applications.",

keywords = "Mechanical properties, Microstructure, Refractory high entropy alloys, Wear properties",

author = "Vipul Bhardwaj and Qing Zhou and Fan Zhang and Weichao Han and Yin Du and Ke Hua and Haifeng Wang",

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year = "2021",

month = aug,

doi = "10.1016/j.triboint.2021.107031",

language = "英语",

volume = "160",

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T1 - Effect of Al addition on the microstructure, mechanical and wear properties of TiZrNbHf refractory high entropy alloys

AU - Bhardwaj, Vipul

AU - Zhou, Qing

AU - Zhang, Fan

AU - Han, Weichao

AU - Du, Yin

AU - Hua, Ke

AU - Wang, Haifeng

PY - 2021/8

Y1 - 2021/8

N2 - A series of AlxTiZrNbHf refractory high entropy alloys (RHEAs) were prepared to investigate the mechanical and wear properties. Despite the different crystal structures of each constituent, the RHEAs exhibited body centered cubic (BCC) phase structures as revealed by X-ray diffraction and transmission electron microscopy. Along with the primary BCC phase, another ordered BCC phase appeared in AlTiZrNbHf, being supported by a high negative mixing enthalpy (<−16.28 kJ-mol−1) and a low valence electron concentration (< 4.04). The improved mechanical properties and wear resistance by the Al addition are ascribed to severe lattice distortion and second phase strengthening. These findings highlight significant alterations in the microstructure, mechanical and wear properties with the Al addition, which are beneficial to the design of alloys for wear applications.

AB - A series of AlxTiZrNbHf refractory high entropy alloys (RHEAs) were prepared to investigate the mechanical and wear properties. Despite the different crystal structures of each constituent, the RHEAs exhibited body centered cubic (BCC) phase structures as revealed by X-ray diffraction and transmission electron microscopy. Along with the primary BCC phase, another ordered BCC phase appeared in AlTiZrNbHf, being supported by a high negative mixing enthalpy (<−16.28 kJ-mol−1) and a low valence electron concentration (< 4.04). The improved mechanical properties and wear resistance by the Al addition are ascribed to severe lattice distortion and second phase strengthening. These findings highlight significant alterations in the microstructure, mechanical and wear properties with the Al addition, which are beneficial to the design of alloys for wear applications.

KW - Mechanical properties

KW - Microstructure

KW - Refractory high entropy alloys

KW - Wear properties

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U2 - 10.1016/j.triboint.2021.107031

DO - 10.1016/j.triboint.2021.107031

M3 - 文章

AN - SCOPUS:85103932647

SN - 0301-679X

VL - 160

JO - Tribology International

JF - Tribology International

M1 - 107031

ER -

Effect of Al addition on the microstructure, mechanical and wear properties of TiZrNbHf refractory high entropy alloys

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Keywords

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