Review of Recent Research on AlCoCrFeNi High-Entropy Alloy

Tokarewicz, Marzena; Grądzka-Dahlke, M.

doi:10.3390/met11081302

Cited by 93 publications

(21 citation statements)

References 97 publications

(104 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unique features attributed to HEA such as solid solution strengthening due to severe lattice-distortion, sluggish diffusion, and the cocktail effect [5][6][7], were supposed to be caused by the multiprincipal solid solution effect, so in this context, the term HEA should refer to single-phase multiprincipal alloys [8]. However, the majority of HEA considered nowadays in the equilibrium state at an ambient temperature has several phases [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25], even those that were considered to be single-phase in early research [16,17]. It is likely that during solidification, the different atoms distribute in accordance with their affinity, leading to liquation, namely, the appearance of regions of different compositions not satisfying the criteria of solid solution formation.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, methods are being developed to predict the formation and stability of HEA taking into account the formation enthalpies of competing phases [13,26]. To date, among all the others that ever proposed HEA, the alloys based on an AlCoCrFeNi system have been the most studied [2,5,[9][10][11][12][13][14][15][19][20][21][22][23][24][25]. The reason for this are the outstanding mechanical properties and phase formation phenomena.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Al Content on Phase Compositions of FeNiCoCrMo0.5Alx High Entropy Alloy

Semikolenov

Shalnova

Klinkov

et al. 2021

Metals

View full text Add to dashboard Cite

The FeCoNiCrMo0.5Alx system with x up to 2.13 was analyzed from the point of view of evolution of the phase composition and microstructure. Cast samples were synthesized by induction melting and analyzed by X-ray diffraction, energy dispersive spectroscopy, scanning electron microscopy, and Vickers microhardness test methods. Phase compositions of these alloys in dependance on Al concentration consist of FCC solid solution, σ-phase, NiAl-based B2 phase, and BCC solid solution enriched with Mo and Cr. Phase formation principles were studied. Al dissolves in a FeCoNiCrMo0.5 FCC solid solution up to 8 at.%.; at higher concentrations, Al attracts Ni, removing it from FCC solid solution and forming the B2 phase. Despite Al not participating in σ-phase formation, an increase in Al concentration to about 20 at.% leads to a growth in the σ-phase fraction. The increase in the σ-phase was caused by an increase in the amount of B2 because the solubility of σ-forming Mo and Cr in B2 was less than that in the FCC solution. A further increase in Al concentration led to an excess of Mo and Cr in the solution, which formed a disordered BCC solid solution. The hardness of the alloys attained the maximum of 630 HV at 22 and 32 at.% Al.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Al Content on Phase Compositions of FeNiCoCrMo0.5Alx High Entropy Alloy

Semikolenov

Shalnova

Klinkov

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…A German metallurgist, Franz Karl Archard, prepared HEA for the first time in the late 18th century by using an equal mass of five to seven elements; however, the results were not satisfactory [ 6 ]. Therefore, many researchers were not interested in preparing HEAs due to the failure of the HEA concept during that time.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications

Rajendrachari

Adimule²,

Gülen

et al. 2022

Materials

View full text Add to dashboard Cite

High entropy alloys (HEA) are one of the modern-era alloys accelerating with greater velocity because of their excellent properties and different applications. In the present paper, we have successfully fabricated HEA (23Fe-21Cr-18Ni-20Ti-18Mn) powders by ball milling the elemental Fe, Cr, Ni, Ti, and Mn powders for 15 h. The advancement of the milling process and phase transformation of HEAs were studied by using X-ray diffraction (XRD) and scanning electron microscope (SEM). The crystallite size and the lattice strain of the HEA were calculated by using the Williamson-Hall (W-H) equation and the values were found to be 7 nm and 0.0176%, respectively. Similarly, the true lattice parameter was calculated using the Nelson–Riley (N-R) extrapolation method, and the value was found to be 3.544 Å. We have successfully investigated the electrochemical response of 15 h ball milled 23Fe-21Cr-18Ni-20Ti-18Mn HEA powders to determine the ascorbic acid (AA) using cyclic voltammetry. We have modified the carbon paste electrode with ball milled HEA of concentrations 0, 2, 4, 6, 8, and 10 mg, and among them, 8 mg HEA modified carbon paste electrode (HEA-MCPE) depicted the highest current sensitivity. We reported the effect of modifier concentration, analyte concentration, scan rate, and pH on the oxidation peak of AA. The electrochemical active surface area of carbon paste and MCPE was calculated using the Nernst equation and the values were found to be 0.0014 cm2 and 0.0027 cm2, respectively. The fabricated HEA-MCPE showed excellent current sensitivity, stability, anti-fouling, and selectivity.

show abstract

“…The last defined phenomenon, the cocktail effect, is related to the properties of HEA. It indicates that when multiple elements are mixed together, it can result in unexpected properties that single elements cannot achieve [ 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Structure and Corrosion Resistance of Novel High-Entropy Alloys for Potential Biomedical Applications

et al. 2022

Self Cite

View full text Add to dashboard Cite

High-entropy alloys are a new generation of materials that have attracted the interest of numerous scientists because of their unusual properties. It seems interesting to use these alloys in biomedical applications. However, for this purpose, the basic condition of corrosion resistance must be fulfilled. In this article, selected corrosion properties of self-composed high-entropy alloys are investigated and compared with conventional biomedical alloys, that is titanium alloys and stainless steels. Corrosive parameters were determined using the potentiodynamic method. X-ray diffraction studies were performed to characterize the crystal structures. Microstructures of the prepared materials were examined using a scanning electron microscope, and surface hardness was measured by the Vickers method. The results show that investigated high-entropy alloys are characterized by simple structures. Three out of four tested high-entropy alloys had better corrosion properties than conventional implant alloys used in medicine. The Al0.7CoCrFeNi alloy was characterized by a corrosion potential of −224 mV and a corrosion current density of 0.9 μA/cm2; CoCrFeNiCu by −210 mV and 1.1 μA/cm2; TiAlFeCoNi by −435 mV and 4.6 μA/cm2; and Mn0.5TiCuAlCr by −253 mV and 1.3 μA/cm2, respectively. Therefore, the proposed high-entropy alloys can be considered as potential materials for biomedical applications, but this requires more studies to confirm their biocompatibility.

show abstract

Review of Recent Research on AlCoCrFeNi High-Entropy Alloy

Cited by 93 publications

References 97 publications

Effect of Al Content on Phase Compositions of FeNiCoCrMo0.5Alx High Entropy Alloy

Effect of Al Content on Phase Compositions of FeNiCoCrMo0.5Alx High Entropy Alloy

Synthesis and Characterization of High Entropy Alloy 23Fe-21Cr-18Ni-20Ti-18Mn for Electrochemical Sensor Applications

Investigation of the Structure and Corrosion Resistance of Novel High-Entropy Alloys for Potential Biomedical Applications

Contact Info

Product

Resources

About