A comparison of the high-temperature oxidation behaviour of conventional wrought and laser beam melted Inconel 625

Nicolas Ramenatte,Annabelle Vernouillet,Stéphane Mathieu,Aurélie Vande Put,Michel Vilasi,Daniel Monceau

doi:10.1016/j.corsci.2019.108347

A comparison of the high-temperature oxidation behaviour of conventional wrought and laser beam melted Inconel 625

Nicolas Ramenatte, Annabelle Vernouillet + Show 4 more

Open Access

https://doi.org/10.1016/j.corsci.2019.108347

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Journal: Corrosion Science	Publication Date: Nov 19, 2019
Citations: 43	License type: publisher-specific-oa

Affiliation: Institut Jean Lamour, Université de Lorraine, French National Centre for Scientific Research, Université de Toulouse, Interuniversity Center of Materials Research and Engineering, National Polytechnic Institute of Toulouse

#Laser Beam Melted #Conventionally Manufactured + Show 8 more

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Abstract

The microstructure and oxidation resistance of Laser Beam Melted (LBM) and Conventionally Manufactured (CM) Inconel 625 alloys were studied at 900 °C and 1050 °C. The microstructure of the LBM samples was cellular, with Nb and Mo segregations located at the cell walls. At 900 °C, the oxidation rate was similar for both materials but was clearly higher for the LBM material at 1050 °C. This high oxidation rate induced poor oxide scale compactness, void formation in the subsurface region and the formation of a high amount of Nb1.5Cr0.5O4 at the alloy-oxide interface.

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