Review of Novel High-Entropy Protective Materials: Wear, Irradiation, and Erosion Resistance Properties

Feltrin, Ana C.; Xing, Qiuwei; Akinwekomi, Akeem Damilola; Waseem, Owais Ahmed; Akhtar, Farid

doi:10.3390/e25010073

Cited by 15 publications

(5 citation statements)

References 190 publications

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“…It is known that helium bubbles in NiCoFeCrMn HEAs have a smaller size, higher density, denser distribution and a lower volume fraction compared to NiCoFeCr HEAs and nickel [ 29 , 61 ]. This indicates that NiCoFeCrMn alloys have a stronger resistance to He bubble formation.…”

Section: Discussionmentioning

confidence: 99%

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

et al. 2023

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High-entropy alloys (HEAs) have prospects for use as nuclear structural materials. Helium irradiation can form bubbles deteriorating the structure of structural materials. The structure and composition of NiCoFeCr and NiCoFeCrMn HEAs formed by arc melting and irradiated with low-energy 40 keV He2+ ions and a fluence of 2 × 1017 cm−2 have been studied. Helium irradiation of two HEAs does not change the elemental and phase composition, and does not erode the surface. Irradiation of NiCoFeCr and NiCoFeCrMn with a fluence of 5 × 1016 cm−2 forms compressive stresses (−90 … −160 MPa) and the stresses grow over −650 MPa as fluence increases to 2 × 1017 cm−2. Compressive microstresses grow up to 2.7 GPa at a fluence of 5 × 1016 cm−2, and up to 6.8 GPa at 2 × 1017 cm−2. The dislocation density rises by a factor of 5–12 for a fluence of 5 × 1016 cm−2, and by 30–60 for a fluence of 2 × 1017 cm−2. Stresses and dislocation density in the HEAs change the most in the region of the maximal damage dose. NiCoFeCrMn has higher macro- and microstresses, dislocation density, and a larger increase in their values, with an increasing helium ion fluence compared to NiCoFeCr. NiCoFeCrMn a showed higher radiation resistance compared to NiCoFeCr.

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Section: Discussionmentioning

confidence: 99%

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

et al. 2023

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“…This is also demonstrated by its lower corrosion rate of 0.01563 mm/year. This phase, which is rich in Cr, Mn, and Fe, is well recognized for its exceptional resistance to corrosion, especially in harsh environments such acids and chloride-containing solutions [13,14]. The ability of the material to form a shielding oxide layer, which stops corrosion, is increased by chromium and manganese [22] .…”

Section: H 2 So 4 Solutionmentioning

confidence: 99%

“…This area is rich in Cr, Mn, and Fe and is best known for its exceptional resistance to corrosion, especially in harsh environments like acids and chloride-containing solutions. [13,14]. The ability of the material to form a shielding oxide layer, which stops corrosion, is enhanced by the presence of Cr and Mn.…”

Section: Nacl Solutionmentioning

confidence: 99%

“…The alloy's practical applicability in chemical processing applications depends on improving its ductility and toughness while keeping other desired qualities [12]. AlCrFeNiMn HEA can be susceptible to localized corrosion phenomena such as pitting corrosion and crevice corrosion [13]. To make sure the alloy is stable and doesn't degrade over time, it is critical to evaluate the alloy's corrosion resistance against the speci c chemicals used in the process [14].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion performance of Cu doped AlCrFeNiMn HEA synthesized via Arc-Melting

Mpofu,

Malatji,

Shongwe

et al. 2024

Preprint

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The development of novel corrosion-resistant components is essential since malfunction of materials like super alloys during industrial applications might cause financial loss. Arc-melting and casting were used to create AlCrFeCuNi high entropy alloys (HEAs), which were then doped with various atomic percentages of copper (Cu). Investigations were conducted into the effects of Cu on the evolution of microstructural features, corrosion behavior in various solutions, nano hardness, and thermal stability. The alloy samples had a dendritic microstructure with three different phase zones, as seen by scanning electron micrographs, and EDS validated the elements that were included into the alloys. The behavior of the HEAs' nano hardness and corrosion resistance significantly improved with the addition of Cu. In NaOH and Na2SO4 solutions, 3 at.% Cu samples demonstrated superior resistance to corrosion. With NaCl and H2SO4 solutions, 5 at.% Cu samples displayed greater corrosion resistance. The sample with 1 at.% Cu showed superior corrosion resistance in HCl solution.

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“…The appreciable improvement in mechanical properties of alloys is due to the chemical and structural disorder present in the high entropy phase. These include high configurational entropy and severe lattice distortion 1 . Entropy can be used as a basic method for quantifying degradation, including wear and friction.…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of Iron Based Alloys with Different Entropy Extent Estimated by Miedema's Model

Eqal,

Hussein

2024

Mat. Res.

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In most situations, predicting wear requires a variety of microstructural characterizations and experiments with contact surfaces. Based on physical principles, mathematical models might be of great assistance in understanding and thereby predicting this event. Considering the significance of heat generation in war, it appears that the parameters of thermodynamics are appropriate measurements for wear modelling. Entropy is among these parameters of thermodynamics. The Miedema model is a good method to predict the Gibbs free energy and entropy of solid solutions of binary and ternary systems. In this study, the wear behaviour of iron-based alloys according to their estimating values of Gibbs free energies and entropy was studied under lubricated conditions. The wear test was performed in accordance with ASTM-G99, utilizing the vertical universal friction testing machine MMW-1A and the pin-on-disk test methodology. Results show that the lowest negative value of Gibbs free energy was noted in the Fe-Al-Sn ternary system (-14.37 KJ/mol), while the highest negative value was found in the Fe-Al-V (-25.16 KJ/mol) binary system. It was also concluded that the wear rate decreased when the entropy estimate increased. The higher value of the wear rate was (6.935 mm 3 \N.m x10 7 ) for Fe-Al binary alloy with an entropy value (1.717 J\k Mole). The lowest value of wear rate was (3.581 mm 3 \N.m *10 7 ) for Fe-Al-Sn ternary alloy with an entropy of (2.71 J\k Mole). This is due to the micro-distortion that was mechanically indicated with the ternary alloys Fe-Al with V, Mn, Ga.B, and Sn additives that affected the wear mechanism and caused high values of wear.

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Review of Novel High-Entropy Protective Materials: Wear, Irradiation, and Erosion Resistance Properties

Cited by 15 publications

References 190 publications

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

Composition and Structure of NiCoFeCr and NiCoFeCrMn High-Entropy Alloys Irradiated by Helium Ions

Corrosion performance of Cu doped AlCrFeNiMn HEA synthesized via Arc-Melting

Wear Behavior of Iron Based Alloys with Different Entropy Extent Estimated by Miedema's Model

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