Element redistributions during early stages of oxidation in a Ni38Cr22Fe20Mn10Co10 multi-principal element alloy. (15th March 2021)

• Record Type: Journal Article
• Authors: Kautz, Elizabeth J.; Lambeets, Sten V.; Perea, Daniel E.; Gerard, Angela Y.; Han, Junsoo; Scully, John R.; Saal, James E.; Schreiber, Daniel K.
• Is Part Of: Scripta materialia. Number 194(2021)
• Publication Date: 2021-03-15
• Subjects: Multi principal element alloy -- Oxidation mechanisms -- Oxide/metal interface -- Atom probe tomography; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.10.051
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Element redistributions after initial oxidation of a Ni38 Cr22 Fe20 Mn10 Co10 (at.%) multi-principle element alloy at 120 °C and 300 °C is captured via in situ atom probe tomography. All cations contribute to the oxide in both conditions, consisting of a Cr-rich inner oxide and a Fe, Mn, Co and Ni-rich outer oxide. At lower temperature, Ni tends to be trapped at the outer/inner oxide interface, while Ni enriches at the oxide/metal interface at higher temperature in tandem with Cr metal depletion. These observations confirm oxidation of complex alloys involves the formation of metastable, multi-layered oxide films, with a distinct tendency for solute trapping. Graphical abstract: Image, graphical abstract