Segregation and migration of species in the CrCoFeNi high entropy alloy

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Date
2014-06-25
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Elsevier
Abstract
The formation and migration of intrinsic defects in the CrCoFeNi high entropy alloy has been investigated using ab-initio modeling. The ease of vacancy formation was found to vary depending on the element: vacancies formed by the removal of Fe, Ni and Co are positive while Cr has a negative vacancy formation energy and will precipitate out of the CrCoFeNi alloy. This mechanism may allow the formation of a corrosion passivating oxide layer, analogous to Cr behaviour in stainless steels. The migration and behaviour of intrinsic interstitial defects has also been investigated. © Elsevier B.V.
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Keywords
Alloys, Diffusion, Point defects, Corrosion, Simulation, Oxides
Citation
Middleburgh, S. C., King, D. M., Lumpkin, G. R., Cortie, M., & Edwards, L. (2014). Segregation and migration of species in the CrCoFeNi high entropy alloy. Journal of Alloys and Compounds, 599, 179-182. doi:10.1016/j.jallcom.2014.01.135
URI
http://dx.doi.org/10.1016/j.jallcom.2014.01.135
 http://apo.ansto.gov.au/dspace/handle/10238/7642
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