Microstructure refinement and enhanced mechanical properties in rapid-quenched MnCrFeCoNi high-entropy alloy

Shao, Yanyan; Guo, Pengwei; Liang, Ningning; Cheng, Siyu; Wang, Jiantao; Xu, Feng

doi:10.1016/j.heliyon.2023.e22530

Cited by 3 publications

(2 citation statements)

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“…According to reports, an increase in grain boundary density causes the oxide layer produced in fine grains to be more stable than that of coarse grains [10]. The diffusion rate of oxygen and metal atoms can be effectively reduced by severe lattice deformation, leading to a sluggish rate of oxide development [11].…”

Section: Introductionmentioning

confidence: 99%

“…The amount of stable oxide-forming elements is the major factor affecting the HEAs' ability to withstand oxidation [24]. As a result, numerous research alter the concentration of stable oxide-forming components, particularly Al, to increase the oxidation resistance of HEAs [11]. The different alloying elements start to oxidize at different temperatures depending on their affinity as well as their evaporation partial pressure, for example, Mn > 300 • C, Al > 300 • C, Cr > 400 • C, Ni > 500 • C, and Fe > 700 • C are confirmed to oxidize [24].…”

Section: Introductionmentioning

confidence: 99%

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Oxidation of Fe35Mn21Ni20Cr12Al12 High Entropy Alloy in Dry Air

Mohamed,

Abd ElMoamen,

Yoo

et al. 2024

Alloys

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The isothermal oxidation of a Fe35Mn21Ni20Cr12Al12 high entropy alloy (HEA) was investigated in dry air for 50 h at 500, 600, and 700 °C after 90% cold rolling. The Fe35Mn21Ni20Cr12Al12 HEA behaves according to the linear oxidation rate with rate constants of 1 × 10−6, 3 × 10−6, and 7 × 10−6 g/(cm2·s) for oxidation at 500 °C, 600 °C, and 700 °C, respectively. The activation energy for oxidation of the HEA was calculated to be 60.866 KJ/mole in the 500–700 °C temperature range. The surface morphology and phase identification of the oxide layers were characterized. The formation of MnO2, Mn2O3, Mn3O4, Cr2O3, and Al2O3 in the oxide layers along with Fe2O3 is the key to the oxidation mechanism. The elemental mapping and line EDX scans were performed to identify the oxidation mechanisms.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%