Microstructure evolution of FeNiCr alloy induced by stress-oxidation coupling 
using high temperature nanoindentation

Li, Yan; Fang, Xufei; Zhang, Siyuan; Feng, Xue

doi:10.1016/j.corsci.2018.02.043

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Microstructure evolution of FeNiCr alloy induced by stress-oxidation coupling using high temperature nanoindentation

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Zhang, Siyuan
Nanoanalytics and Interfaces, Independent Max Planck Research Groups, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;

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Citation

Li, Y., Fang, X., Zhang, S., & Feng, X. (2018). Microstructure evolution of FeNiCr alloy induced by stress-oxidation coupling using high temperature nanoindentation. Corrosion Science, 135, 192-196. doi:10.1016/j.corsci.2018.02.043.

Cite as: https://hdl.handle.net/21.11116/0000-0001-E6FD-F

Abstract

The microstructure evolution of a FeNiCr alloy oxidized at 600 °C by simultaneously applying stress via high temperature nanoindentation is reported. Analysis using transmission electron microscopy shows that a sharp crack was induced beneath the indentation area under the stress-oxidation coupling condition. Nanotwins beneath the indentation area were also observed, which acted as a barrier that ceased the crack propagation beneath the indenter by altering the path of the crack. Results reveal a transformation from inter-granular crack propagation along the oxide grain boundaries to intra-granular crack propagation through the nanotwin structure with a zig-zag pattern. © 2018 Elsevier Ltd