The Role of Deformation in the Oxidation Behavior of Binary Nickel-Chromium Alloys

Abstract

Nickel-based alloys are well suited for high temperature applications due to their retention of mechanical performance at elevated temperatures; however, these high temperatures are also conducive to accelerated oxidation in these alloys. Oxidation of these alloys can be mitigated by the addition of chromium to the alloy composition and the use of deformation that provides short-circuit diffusion pathways to the surface allowing the rapid formation of protective oxide scales. The beneficial effects of deformation on oxide scale protection have been widely observed in nickel alloy systems, but the fundamental mechanisms on the microscale and nanoscale remain poorly understood. We characterized alloy and scale microstructures developing in model Ni alloys with varying levels of deformation during oxidation at intermediate and high temperatures to establish a mechanistic understanding and advance the current framework for oxidation resistant alloy design.http://deepblue.lib.umich.edu/bitstream/2027.42/176951/1/NiCrPaper-cookeam_-_Aaron_Cooke.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/176951/2/NiCrPosterforDesignExpo-cookeam.pptx_-_Aaron_Cooke.pd

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