High-temperature oxidation properties of economical and lightweight Fe-Cr-Ni-Al medium-entropy alloy

Hwang, Yu-Jin; Kim, Kyu‐Sik; Na, Young Sang; Lee, Kee‐Ahn

doi:10.1016/j.corsci.2023.111231

Cited by 14 publications

(1 citation statement)

References 54 publications

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“…It is found that the formation of precipitated phases not only improves the mechanical properties but also has an effect on the oxidation properties (Stallybrass and Sauthoff, 2004; Sidhu et al , 2017). Especially in the high-temperature oxidation mechanism, the particle size, fraction and distribution of the second precipitated phase can affect the high temperature oxidation behavior if it contains elements that form passive layers (Hwang et al , 2023). In these alloys, the fine chromium carbide particles possess high surface energy, which can adsorb more oxygen (Higashi and Kanno, 2020).…”

Section: Discussionmentioning

confidence: 99%

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Wang,

Liu,

et al. 2024

ACMM

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Purpose The purpose of this paper is to study the high temperature oxidation behavior of Ti and C-added FeCoCrNiMn high entropy alloys (HEAs). Design/methodology/approach Cyclic oxidation method was used to obtain the oxidation kinetic profile and oxidation rate. The microstructures of the surface and cross section of the samples after oxidation were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). Findings The results show that the microstructure of the alloy mainly consisted of FCC (Face-centered Cubic Structure) main phase and carbides (M7C3, M23C6 and TiC). With the increase of Ti and C content, the microhardness, strength and oxidation resistance of the alloy were effectively improved. After oxidation at a constant temperature of 800 °C for 100 h, the preferential oxidation of chromium in the chromium carbide determined the early formation of dense chromium oxide layers compared to the HEAs substrate, resulting in the optimal oxidation resistance of the TC30 alloy. Originality/value More precipitated CrC can preferentially oxidize and rapidly form a dense Cr2O3 layer early in the oxidation, which will slow down the further oxidation of the alloy.

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Section: Discussionmentioning

confidence: 99%

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Wang,

Liu,

et al. 2024

ACMM

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Oxidation behavior of lightweight Al₂NbTi₃V₂Zr high entropy alloy at 1000°C

Tan,

Zhi,

Pei

et al. 2024

Materials & Corrosion

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Lightweight high entropy alloy (LWHEA) has great potential in aeroengine hot component applications. Anticorrosion property of LWHEA at high temperatures is one of the key determining factors. In this study, an LWHEA containing Al, Nb, Ti, V, and Zr elements with a molar ratio of 2: 1: 3: 2: 1 was designed and prepared by low energy (LE) and high energy (HE) mechanical milling followed by vacuum hot pressing. The sintered LE alloy consisted of a simple cubic matrix and α intermetallic while the BCC matrix along with α and β intermetallic phases were observed in HE alloy. The oxidation of LE and HE at 1000°C for 48 h was mainly concentrated on α and β phases, and the resultant oxides were ZrO2 and TiO2. Weight gain curve of HE sample within oxidation time of 48 h followed the parabolic law while a two‐stage parabola was found in LE bulk. The steady‐state oxidation of α precipitate was dominant within 12 h and showed a preferential oxidation mode. High temperature induced simple cubic matrix to stable BCC phase transformation and thus LE alloy with longer oxidation time and HE exhibited a similar uniform oxidation. The oxidation rate of the alloy is related to the content of α and β phases.

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Effect of Fe Concentration on the High Temperature Oxidation Behavior of Fex(CrAlNi)100−x Medium Entropy Alloys

Ozgenc,

Gunduz

2024

High Temperature Corrosion of mater.

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High-temperature oxidation properties of economical and lightweight Fe-Cr-Ni-Al medium-entropy alloy

Cited by 14 publications

References 54 publications

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Oxidation behavior of lightweight Al₂NbTi₃V₂Zr high entropy alloy at 1000°C

Effect of Fe Concentration on the High Temperature Oxidation Behavior of Fex(CrAlNi)100−x Medium Entropy Alloys

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High-temperature oxidation properties of economical and lightweight Fe-Cr-Ni-Al medium-entropy alloy

Cited by 14 publications

References 54 publications

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Effect of Ti and C addition on oxidation resistance of FeCoCrNiMn high entropy alloys prepared by powder metallurgy

Oxidation behavior of lightweight Al2NbTi3V2Zr high entropy alloy at 1000°C

Effect of Fe Concentration on the High Temperature Oxidation Behavior of Fex(CrAlNi)100−x Medium Entropy Alloys

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Oxidation behavior of lightweight Al₂NbTi₃V₂Zr high entropy alloy at 1000°C