Cyclic Oxidation Resistance of Hot-Dipping Aluminized GH169

Jin Lou; Cheng Xiang Ruan

doi:10.4028/www.scientific.net/AMR.1061-1062.436

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1061-1062Cyclic Oxidation Resistance of Hot-Dipping...

Cyclic Oxidation Resistance of Hot-Dipping Aluminized GH169

Abstract:

GH169 superalloy steel was coated by hot-dipping in a molten aluminum bath, and then diffusing annealing at 950 °C for 2h. The cyclic oxidation behaviors of the hot-dipped aluminized steel and GH169 were tested at 900 °C for 24 cycles using resistance furnace. Morphology of surface and cross-section, element distribution of the oxide scale were characterized by SEM and EDS. The results showed that protective Cr₂O₃ and Al₂O₃ oxide scales were formed on GH169 and aluminized steel after 24 cycles, respectively. The inner oxidation was found on GH169 after 24 cycles. It was composed of surface Al₂O₃ oxide film, outer Al-rich layer scattered with NiAl phase, and inner NiAl layer on aluminized steel after 24 cycles at 900°C.

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Periodical:

Advanced Materials Research (Volumes 1061-1062)

Pages:

436-440

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1061-1062.436

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Online since:

December 2014

Authors:

Jin Lou, Cheng Xiang Ruan

Keywords:

Cyclic Oxidation Resistance, GH169 Steel, High Temperature Oxidation, Hot-Dipping Aluminum

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