A promising new class of multi-component alloys with exceptional mechanical properties

Qiao, Lei; Aorigele,; Lai, Zhonghong; Zhu, Jingchuan

doi:10.1016/j.jallcom.2020.155929

Cited by 18 publications

(3 citation statements)

References 49 publications

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“…Tang et al [ 27 ] investigated the effect of atmosphere and reactive element addition on the high‐temperature oxidation of AlCrFeNi‐(Mn or Co) high‐entropy alloys. Our previous work [ 28–30 ] also proposed several AlCrFeNi‐based MPEAs with promising properties.…”

Section: Introductionmentioning

confidence: 99%

Wear of a Fe2.5Ni2.5CrAl Multiprincipal Element Alloy: A Combined Experimental and Molecular Dynamics Study

Qiao,

Ramanujan,

Zhu

2023

Adv Eng Mater

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The Fe2.5Ni2.5CrAl multi‐principal element alloy (MPEA) is a promising material for engineering application because of its high strength and plasticity values. To evaluate the friction and wear performance, reciprocating dry sliding tests and molecular dynamics (MD) simulations were performed to determine the wear mechanism over a range of length scales. This alloy exhibited a lower average friction coefficient and wear volume loss during dry sliding compared with the well‐known Fe2Ni2CrAl alloy. The worn surface morphology revealed abrasive scratches, grooves, and delamination. The fine wear debris possessed high oxygen content, leading to higher wear resistance. The wear mechanism involved abrasive, adhesive, and oxidative wear. The wear, atomic stress and shear strain, dislocations, and lattice structure were analyzed by MD simulations. Point defects, atomic clusters and stacking faults were identified in the nano‐wear process. The behavior of the 1/6<112>(Shockley) type dislocations was identified as the main dislocation mechanism during sliding. Stacking faults produced during the stress release process were present in the indentation. This work provides a deep insight into the friction and wear behavior of Fe2.5Ni2.5CrAl MPEAs.This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 99%

Wear of a Fe2.5Ni2.5CrAl Multiprincipal Element Alloy: A Combined Experimental and Molecular Dynamics Study

Qiao,

Ramanujan,

Zhu

2023

Adv Eng Mater

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“…Many studies have reported on low cost effective Co‐free HEAs. [ 19–23 ] For example,

{CrFeNi}_{2} Al

eutectic HEAs display excellent mechanical properties with high ultimate strength and elongation. [ 19 ] Chen et al [ 20 ] investigated the effects of aluminum on microstructure and compressive properties of Al–Cr–Fe–Ni eutectic multicomponent alloys at room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…[ 19 ] Chen et al [ 20 ] investigated the effects of aluminum on microstructure and compressive properties of Al–Cr–Fe–Ni eutectic multicomponent alloys at room temperature. Our previous studies [ 21 ] on

{FeCr}_{1 .2} {Ni}_{x} Al

HEAs exhibit favorable combined properties of high hardness, compressive strength, and work hardening ability. Previous studies on Al–Cr–Fe–Ni HEAs focused on mechanical properties, rather than tribological properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys

2022

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Several high‐entropy alloys (HEAs) and medium‐entropy alloys (MEAs) are promising for wear applications due to their excellent strength and fracture toughness. Herein, a series of MEAs (x = 0.3, 0.5, 0.8, 1.0, 1.2) are prepared by a vacuum arc‐melting techniques. The effects of Al content on the crystal structures and mechanical properties are evaluated in terms of hardness and wear resistance. With an increase in Al content, the microstructure changes from face‐centered cubic (FCC) + body‐centered cubic (BCC)/B2 phases to B2/BCC phases. A higher volume fraction of the BCC phase with increasing Al content favors spinodal decomposition. The Vickers microhardness increases from 345HV (x = 0.3) to 486HV (x = 1.2) with increasing Al content; a nanohardness size effect is revealed by nanoindentation tests. For high Al contents (x = 1.2), the coefficient of friction and wear rate reach the lowest value when the worn surface is smooth with smaller debris, indicating improved wear resistance. Furthermore, this series of MEAs exhibits wear related to abrasion, adhesion, and oxidation; the dominant wear mechanism is influenced by the Al content.

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Microstructure, mechanical property and wear behavior of AlCrFe1.5Ni1.5 medium entropy alloy

Qiao

Zhu

2022

J Mater Sci

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A promising new class of multi-component alloys with exceptional mechanical properties

Cited by 18 publications

References 49 publications

Wear of a Fe2.5Ni2.5CrAl Multiprincipal Element Alloy: A Combined Experimental and Molecular Dynamics Study

Wear of a Fe2.5Ni2.5CrAl Multiprincipal Element Alloy: A Combined Experimental and Molecular Dynamics Study

Effect of Aluminum on the Friction and Wear Behavior of AlxCrFeNi Medium‐Entropy Alloys

Microstructure, mechanical property and wear behavior of AlCrFe1.5Ni1.5 medium entropy alloy

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