The effect of carbon on the microstructures, mechanical properties, and deformation mechanisms of thermo-mechanically treated Fe40.4Ni11.3Mn34.8Al7.5Cr6 high entropy alloys

Recently, heterostructured (HS) materials, consisting of hard and soft zones with dramatically different strengths, have been developed and received extensive attention because they have been reported to exhibit superior mechanical properties over those predicted by the rule of mixtures. Due to the accumulation of geometrically necessary dislocations during plastic deformation, a back stress is developed in the soft zones to increase the yield strength of HS materials, which also induce forward stress in the hard zones, and a global hetero-deformation induced (HDI) hardening to retain ductility. High-entropy alloys (HEAs) and medium-entropy alloys (MEAs) or multicomponent alloys usually contain three or more principal elements in near-equal atomic ratios and have been widely studied in the world. This review paper first introduces concepts of HS materials and HEAs/MEAs, respectively, and then reviewed emphatically the mechanical properties and deformation mechanisms of HS HEAs/MEAs. Finally, we discuss the prospect for industrial applications of the HS HEAs and MEAs.

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Effect of the structure of vacuum condensates of high entropy alloys of Cr–Fe–Co–Ni–Cu system on their mechanical properties

Sovremennaâ èlektrometallurgiâ ◽

10.37434/sem2020.04.03 ◽

2020 ◽

Vol 2020 (4) ◽

pp. 16-22

Author(s):

A.I. Ustinov ◽

◽

V.S. Skorodzievskii ◽

S.A. Demchenkov ◽

S.S. Polishchuk ◽

...

Keyword(s):

Mechanical Properties ◽

High Entropy Alloys ◽

High Entropy ◽

Vacuum Condensates

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Powder plasma arc additive manufactured CoCrFeNi(SiC)x high-entropy alloys: Microstructure and mechanical properties

Materials Letters ◽

10.1016/j.matlet.2020.128736 ◽

2021 ◽

Vol 282 ◽

pp. 128736 ◽

Cited By ~ 1

Author(s):

Qingkai Shen ◽

Xiangdong Kong ◽

Xizhang Chen ◽

Xukai Yao ◽

Vladislav B. Deev ◽

...

Keyword(s):

Mechanical Properties ◽

High Entropy Alloys ◽

Plasma Arc ◽

High Entropy ◽

Microstructure And Mechanical Properties

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Influence of Refractory Elements on Mechanical Properties of High Entropy Alloys

Transactions of the Indian Institute of Metals ◽

10.1007/s12666-021-02363-x ◽

2021 ◽

Author(s):

Agnivesh Kumar Sinha ◽

Vinay Kumar Soni ◽

Rituraj Chandrakar ◽

Anil Kumar

Keyword(s):

Mechanical Properties ◽

High Entropy Alloys ◽

High Entropy ◽

Refractory Elements

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Ultra-fine grain TixVNbMoTa refractory high-entropy alloys with superior mechanical properties fabricated by powder metallurgy

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.158592 ◽

2021 ◽

Vol 865 ◽

pp. 158592

Author(s):

Qing Liu ◽

Guofeng Wang ◽

Xiaochong Sui ◽

Ye Xu ◽

Yongkang Liu ◽

...

Keyword(s):

Mechanical Properties ◽

Powder Metallurgy ◽

High Entropy Alloys ◽

High Entropy ◽

Fine Grain ◽

Superior Mechanical Properties

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Effects of Different Contents of Each Component on the Structural Stability and Mechanical Properties of Co-Cr-Fe-Ni High-Entropy Alloys

Applied Sciences ◽

10.3390/app11062832 ◽

2021 ◽

Vol 11 (6) ◽

pp. 2832

Author(s):

Haibo Liu ◽

Cunlin Xin ◽

Lei Liu ◽

Chunqiang Zhuang

Keyword(s):

Mechanical Properties ◽

Structural Stability ◽

High Entropy Alloys ◽

Face Centered Cubic ◽

Obvious Effect ◽

High Entropy ◽

Precise Control ◽

Component Content ◽

Face Centered ◽

And Performance

The structural stability of high-entropy alloys (HEAs) is closely related to their mechanical properties. The precise control of the component content is a key step toward understanding their structural stability and further determining their mechanical properties. In this study, first-principle calculations were performed to investigate the effects of different contents of each component on the structural stability and mechanical properties of Co-Cr-Fe-Ni HEAs based on the supercell model. Co-Cr-Fe-Ni HEAs were constructed based on a single face-centered cubic (FCC) solid solution. Elemental components have a clear effect on their structure and performance; the Cr and Fe elements have an obvious effect on the structural stability and equilibrium lattice constant, respectively. The Ni elements have an obvious effect on stiffness. The Pugh ratios indicate that Cr and Ni addition may increase ductility, whereas Co and Fe addition may decrease it. With increasing Co and Fe contents or decreasing Cr and Ni contents, the structural stability and stiffness of Co-Cr-Fe-Ni HEAs are improved. The structural stability and mechanical properties may be related to the strength of the metallic bonding and covalent bonding inside Co-Cr-Fe-Ni HEAs, which, in turn, is determined by the change in element content. Our results provide the underlying insights needed to guide the optimization of Co-Cr-Fe-Ni HEAs with excellent mechanical properties.

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