High thermal stability and oxidation behavior of FeCrNiAl-based medium-entropy alloys prepared by powder metallurgy

Yang, Danni; Liu, Yong; Han, Tianyi; Zhou, Fei; Qu, Nan; Liao, Mingqing; Lai, Zhonghong; Zhu, Jingchuan

doi:10.1016/j.jallcom.2022.165562

Cited by 13 publications

(3 citation statements)

References 60 publications

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“…High tensile elongation and a notable strain hardening capability are characteristics of the CoCrFeNiMn high entropy alloy (HEA), although wear resistance is low [82]. Enhancing the wear resistance of the CoCrFeNiMn HEA through powder metallurgy alloying with carbon element appears to be a workable and economical solution [83].…”

Section: Compression Strengthmentioning

confidence: 99%

Fabrication of High Entropy Alloy by Powder Metallurgy Process

B. Aravinth,

Geetha Arumugam,

R. Mayildurai

2024

Int Res J Adv Engg Hub

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Recently, High entropy alloys have attracted a lot of interest because of their unique properties. which include outstanding strength, remarkable corrosion resistance, and consistent thermal stability. Powder metallurgy is one of the production procedures commonly used to manufacture these alloys. Metal powders are compacted and sintered to create a cohesive material in the production process known as powder metallurgy. The capacity to produce a fine-grained microstructure and a homogeneous distribution of various elements are two benefits of this technology for the synthesis of high entropy alloys. Moreover, powder metallurgy makes it possible to precisely combine various alloying constituents, which can improve the qualities of high entropy alloys even more. Powder metallurgy allows for the manufacture of intricate shapes and dimensions, rendering it well-suited to a range of uses. With the use of powder metallurgy, high entropy alloys can be fabricated with improved mechanical properties and enhanced performance.

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Section: Compression Strengthmentioning

confidence: 99%

Fabrication of High Entropy Alloy by Powder Metallurgy Process

B. Aravinth,

Geetha Arumugam,

R. Mayildurai

2024

Int Res J Adv Engg Hub

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“…A high-entropy alloy (HEA) is a new alloy system designed by using the strategy of equal or near-equal atomic ratio and high mixing entropy, and it is also one of the three breakthroughs in modern metal materials [1][2][3]. The four core effects of an HEA produced via the combination of a variety of main elements, namely, high mixing entropy, lattice distortion, slow diffusion and cocktail effect, have resulted in many microstructures and properties different from traditional alloys, such as simple solid solution structure, high strength, good low-temperature plasticity, good corrosion resistance and oxidation resistance, and good physical properties [4][5][6][7][8]. HEA systems containing Co, Cr, Cu, Fe, Mn, and Ni have been widely studied.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Alloying Behavior and Thermal Stability of CoCrCuFeMnNix High-Entropy Alloy Powders Prepared via MA

et al. 2023

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CoCrCuFeMnNix (x = 0, 0.5, 1.0, 1.5, 2.0 mol, named as Ni0, Ni0.5, Ni1.0, Ni1.5, and Ni2.0, respectively) high-entropy alloy powders (HEAPs) were prepared via mechanical alloying (MA), and XRD, SEM, EDS, and vacuum annealing were used to study the alloying behavior, phase transition, and thermal stability. The results indicated that the Ni0, Ni0.5, and Ni1.0 HEAPs were alloyed at the initial stage (5–15 h), the metastable BCC + FCC two-phase solid solution structure was formed, and the BCC phase disappeared gradually with the prolonging of ball milling time. Finally, a single FCC structure was formed. Both Ni1.5 and Ni2.0 alloys with high nickel content formed a single FCC structure during the whole mechanical alloying process. The five kinds of HEAPs showed equiaxed particles in dry milling, and the particle size increased with an increase in milling time. After wet milling, they changed into lamellar morphology with thickness less than 1 μm and maximum size less than 20 μm. The composition of each component was close to its nominal composition, and the alloying sequence during ball milling was Cu→Mn→Co→Ni→Fe→Cr. After vacuum annealing at 700~900 °C, the FCC phase in the HEAPs with low Ni content transformed into FCC2 secondary phase, FCC1 primary phase, and a minor σ phase. The thermal stability of HEAPs can be improved by increasing Ni content.

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“…Powder metallurgy (including vacuum hot pressing sintering and spark plasma sintering) is a relatively mature alloy preparation process, which has the advantages of near-net forming and restraining component segregation; thus, it has been widely used in the preparation of HEAs. [25][26][27][28][29] In the present work, CoCrCuFeMnNi x HEAs were prepared by vacuum hot pressing sintering process. The effects of Ni element on the microstructure of the alloy system and the corrosive behavior in 3.5% NaCl solution were studied by XRD, SEM, EDS, polarization corrosion, and impedance spectroscopy, to provide a reference for further research and application of HEAs.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and corrosion properties of CoCrCuFeMnNi_x high‐entropy alloys prepared by powder metallurgy

Zhao

Jiang

Ren

et al. 2023

Materials & Corrosion

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CoCrCuFeMnNix (x = 0.5, 1.0, 1.5, 2.0 mol, named Ni0.5, Ni1.0, Ni1.5, and Ni2.0, respectively) high‐entropy alloys (HEAs) were prepared by powder metallurgy. The effects of Ni content on its microstructure and corrosion resistance in a 3.5% NaCl solution were studied. The HEAs with low Ni content consisted of FCC1 primary phase, FCC2 secondary phase, and a few σ phases. While the Ni2.0 alloy was composed of the FCC phase and a small amount of σ phase. The results of polarization corrosion in 3.5% NaCl solution show that the increase of Ni content led to the increase of corrosion potential of the alloy and the decrease of corrosion current density and average corrosion rate. Among them, Ni2.0 alloy had the best corrosion resistance. The electrochemical impedance spectroscopy analysis showed that the increase in Ni content promoted the increase of the polarization resistance of the alloy RCPE and the thickness of the passive film, thus improving the corrosion resistance of the alloys.

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High thermal stability and oxidation behavior of FeCrNiAl-based medium-entropy alloys prepared by powder metallurgy

Cited by 13 publications

References 60 publications

Fabrication of High Entropy Alloy by Powder Metallurgy Process

Fabrication of High Entropy Alloy by Powder Metallurgy Process

Mechanical Alloying Behavior and Thermal Stability of CoCrCuFeMnNix High-Entropy Alloy Powders Prepared via MA

Microstructure and corrosion properties of CoCrCuFeMnNi_x high‐entropy alloys prepared by powder metallurgy

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High thermal stability and oxidation behavior of FeCrNiAl-based medium-entropy alloys prepared by powder metallurgy

Cited by 13 publications

References 60 publications

Fabrication of High Entropy Alloy by Powder Metallurgy Process

Fabrication of High Entropy Alloy by Powder Metallurgy Process

Mechanical Alloying Behavior and Thermal Stability of CoCrCuFeMnNix High-Entropy Alloy Powders Prepared via MA

Microstructure and corrosion properties of CoCrCuFeMnNix high‐entropy alloys prepared by powder metallurgy

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Microstructure and corrosion properties of CoCrCuFeMnNi_x high‐entropy alloys prepared by powder metallurgy