High-temperature oxidation behavior of laser additively manufactured AlCrCoNiSi-based high-entropy alloys at 1100 ℃

Yan, Guanghua; Zheng, Mengyao; Gu, Jianfeng; Li, Chuanwei

doi:10.1016/j.jallcom.2023.173120

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2024

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“…HEAs have a little investigation of their oxidation mechanisms and behaviors in different media for industrial applications [12]. Annealing AlCrFeMnNi HEA improved its compressive strength and corrosion resistance [13,14].…”

Section: Introductionmentioning

confidence: 99%

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%