High-Temperature Oxidation of the CrFeNi Medium-Entropy Alloy

Manzoni AM, Mohring W, Schneider M, Laplanche G, Hagen S, Stephan-Scherb C (2025)

Publication Type: Journal article

Publication year: 2025

Journal

Advanced Engineering Materials Wiley

DOI: 10.1002/adem.202500400

Abstract

The isothermal high-temperature oxidation behavior of the equiatomic CrFeNi medium-entropy alloy is a key issue that determines whether this material is suited for high-temperature application. In this view, the understanding of the long-term behavior is even more crucial than short-term corrosion effects. Herein, a single-phase CrFeNi alloy of the face-centered-cubic structure is exposed to synthetic air at 1000, 1050, and 1100 °C for 24, 100, and 1000 h and its oxidation behavior is systematically compared to that of 316L steel, which shows a surprising initial oxidation stabilization during early stages. The oxidation rate of CrFeNi is parabolic at 1000 °C (with a parabolic constant kp = 1.4·10−5 mg−2 cm−4 s−1) and 1050 °C (kp = 2.7·10−5 mg−2 cm−4 s−1), but breakaway oxidation occurs at 1100 °C after 4 h of exposure. In all cases, the oxide scales are found to (at least) partially spall off. Chromium diffuses outward to form a Cr2O3 layer at the gas/oxide interface, and a thin layer of (Cr, Fe, Ni)3O4 is identified at the oxide/alloy interface. Unlike the 316L alloy, which contains more Mn and Fe, the CrFeNi alloy does not show any catastrophic oxidation behavior at the investigated conditions.

Authors with CRIS profile

Sebastian Hagen Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) (LKO)

Involved external institutions

Bundesanstalt für Materialforschung und -prüfung (BAM) DE Germany (DE) Institut de Recherche de Chimie Paris (IRCP) FR France (FR) Ruhr-Universität Bochum (RUB) DE Germany (DE) Martin-Luther-Universität Halle-Wittenberg (MLU) DE Germany (DE)

How to cite

APA:

Manzoni, A.M., Mohring, W., Schneider, M., Laplanche, G., Hagen, S., & Stephan-Scherb, C. (2025). High-Temperature Oxidation of the CrFeNi Medium-Entropy Alloy. Advanced Engineering Materials. https://doi.org/10.1002/adem.202500400

MLA:

Manzoni, Anna Maria, et al. "High-Temperature Oxidation of the CrFeNi Medium-Entropy Alloy." Advanced Engineering Materials (2025).

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