Effect of crystal structure and grain size on corrosion properties of AlCoCrFeNi high entropy alloy

Parakh, Abhinav; Vaidya, M.; Kumar, Navneet; Chetty, Raghuram; Murty, B.S.

doi:10.1016/j.jallcom.2020.158056

Cited by 84 publications

(19 citation statements)

References 47 publications

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“…Alloy microstructure was, therefore, an important factor for the corrosion behavior of the (CuFeNiMn 1-x )Cr x HEAs. The report by Parakh et al 33 confirmed the relevant role played by alloy microstructure for the corrosion behavior of AlNiCoCrFe HEA in sodium chloride solution. This alloy presented a mixed FCC and BCC structure.…”

Section: Alloy Composition and Passive Film Stabilitymentioning

confidence: 77%

A review on Corrosion of High Entropy Alloys: Exploring the Interplay Between Corrosion Properties, Alloy Composition, Passive Film Stability and Materials Selection

et al. 2022

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The corrosion resistance of high entropy alloys was reviewed in the present work. The main focus was to explore the correlation between alloy composition, passive film stability and corrosion properties and use this information to develop a materials selection procedure based on the Ashby approach. Corrosion current densities and pitting potentials were the main design parameters used to rank different alloys, based on a careful examination of data published in the literature, considering uniform and localized corrosion, respectively. The outputs of the selection process clearly indicated a strong dependence of the corrosion resistance on passive film stability, although microstructural homogeneity and uniform distribution of alloying elements should not be disregarded. Proper combinations of elements such as Co, Al, Ti, Mo and Cr, especially, are effective at enhancing the corrosion resistance of high entropy alloys.

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Section: Alloy Composition and Passive Film Stabilitymentioning

confidence: 77%

A review on Corrosion of High Entropy Alloys: Exploring the Interplay Between Corrosion Properties, Alloy Composition, Passive Film Stability and Materials Selection

et al. 2022

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“…A study published by Parakha et al [ 20 ] examined the correlation between the crystal structure and the corrosion resistance properties of AlCoCrFeNi high-entropy alloy, and the results present that by increasing the FCC content, the alloy is more susceptible to corrosion.…”

Section: Resultsmentioning

confidence: 99%

New HfNbTaTiZr High-Entropy Alloy Coatings Produced by Electrospark Deposition with High Corrosion Resistance

et al. 2021

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The aim of the present paper is to investigate an innovative high corrosion resistance coating realized by electrospark deposition. The coating material was fabricated from HfNbTaTiZr high-entropy alloy. HEA was produced by the mechanical alloying of Hf, Nb, Ta, Ti, and Zr high-purity powders in a planetary ball mill, achieving a good homogenization and a high alloying degree, followed by spark plasma sintering consolidation. The electrodes for electrospark deposition were cut and machined from the bulk material. Stainless steel specimens were coated and electrochemically tested for corrosion resistance in a 3.5% NaCl saline solution.

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“…By addressing the challenges in the SSOS method, in this work, we propose a preselected SSOS (PSSOS) approach that enables HF, HT screening and design of single-phase HEAs. Using experimentally well-studied quinary AlCoCrFeNi 36 – 38 as an example, we employ PSSOS to calculate the formation energy, mass density, and lattice constant in the large composition HEA space, and identify the five most energetically stable compositions with both the BCC and FCC lattices for detailed analysis. Our PSSOS calculation results are compared with the existing experimental data, and a good agreement is found.…”

Section: Introductionmentioning

confidence: 99%

A first-principles-based high fidelity, high throughput approach for the design of high entropy alloys

Sorkin

Chen

et al. 2022

Sci Rep

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Here, we present a preselected small set of ordered structures (PSSOS) method, a first principles-based high fidelity (HF), high throughput (HT) approach, for fast screening of the large composition space of high entropy alloys (HEAs) to select the most energetically stable, single-phase HEAs. Taking quinary AlCoCrFeNi HEA as an example system, we performed PSSOS calculations on the formation energies and mass densities of 8801 compositions in both FCC and BCC lattices and selected five most stable FCC and BCC HEAs for detailed analysis. The calculation results from the PSSOS approach were compared with existing experimental and first-principles data, and the good agreement was achieved. We also compared the PSSOS with the special quasi-random structures (SQS) method, and found that with a comparable accuracy, the PSSOS significantly outperforms the SQS in efficiency, making it ideal for HF, HT calculations of HEAs.

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Effect of crystal structure and grain size on corrosion properties of AlCoCrFeNi high entropy alloy

Cited by 84 publications

References 47 publications

A review on Corrosion of High Entropy Alloys: Exploring the Interplay Between Corrosion Properties, Alloy Composition, Passive Film Stability and Materials Selection

A review on Corrosion of High Entropy Alloys: Exploring the Interplay Between Corrosion Properties, Alloy Composition, Passive Film Stability and Materials Selection

New HfNbTaTiZr High-Entropy Alloy Coatings Produced by Electrospark Deposition with High Corrosion Resistance

A first-principles-based high fidelity, high throughput approach for the design of high entropy alloys

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