Element redistributions after initial gaseous oxidation of a Ni38Cr22Fe20Mn10Co10 (at%) multi-principle element alloy at 120°C and 300°C is captured via psuedo in situ atom probe tomography. All cations contribute to the oxide in both conditions, consisting of a Cr-rich inner oxide and Fe, Mn, Co and Ni-rich outer oxide. At the 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.
Revised: December 21, 2020 |
Published: March 15, 2021
Citation
Kautz E.J., S.M. Lambeets, D.E. Perea, A.Y. Gerard, J. Han, J.R. Scully, and J.E. Saal, et al. 2021.Element redistributions during early stages of oxidation in a Ni38Cr22Fe20Mn10Co10 multi-principal element alloy.Scripta Materialia 194.PNNL-SA-154392.doi:10.1016/j.scriptamat.2020.10.051