Oxidation analysis on surface of Ni-based Ni-Co-W-Ta-Al-Cr-Mo-Re-Nb-Hf single crystal superalloy after vacuum heat treatment

doi:10.13251/j.issn.0254-6051.2021.08.012

Abstract

Abstract: Ni-based Ni-Co-W-Ta-Al-Cr-Mo-Re-Nb-Hf single crystal superalloy specimens were solution treated and aged in a vacuum furnace, and the surface of the specimens showed different oxidation colors due to equipment status or other reasons. The oxidation microstructure and oxide composition on the surface of the single crystal superalloy specimens with different oxidation colors were observed and tested by means of OM, SEM and EDS. The results show that the microstructure status and composition of surface oxides change with the deepening of oxidation degree in different degrees. The oxidation phenomenon showing different oxidation colors should be analyzed for the reasons in detail and treated symptomatically, so the single crystal superalloy with a surface quality that meets the technical requirements can be obtained.

Key words: Ni-based single crystal superalloy, vacuum heat treatment, oxidation color, microstructure, composition

CLC Number:

TG156

Kong Lingli, He Ruijun, Liu Hang, Cheng Yifei. Oxidation analysis on surface of Ni-based Ni-Co-W-Ta-Al-Cr-Mo-Re-Nb-Hf single crystal superalloy after vacuum heat treatment[J]. Heat Treatment of Metals, 2021, 46(8): 61-64.

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