October 15, 2014
Journal Article

Grain boundary depletion and migration during selective oxidation of Cr in a Ni-5Cr binary alloy exposed to high-temperature hydrogenated water

Abstract

High-resolution microscopy of a high-purity Ni-5Cr alloy exposed to 360°C hydrogenated water reveals intergranular selective oxidation of Cr accompanied by local Cr depletion and diffusion-induced grain boundary migration (DIGM). The corrosion-product oxide consists of a porous, interconnected network of Cr2O3 platelets with no further O ingress into the metal ahead. Extensive grain boundary depletion of Cr (to

Revised: January 29, 2015 | Published: October 15, 2014

Citation

Schreiber D.K., M.J. Olszta, and S.M. Bruemmer. 2014. Grain boundary depletion and migration during selective oxidation of Cr in a Ni-5Cr binary alloy exposed to high-temperature hydrogenated water. Scripta Materialia 89. PNNL-SA-102624. doi:10.1016/j.scriptamat.2014.06.022