Site preference of metallic elements in M23C6 carbide in a Ni-based single crystal superalloy

Sisi Xiang, Shengcheng Mao, Zhenju Shen, Haibo Long, Hua Wei, Shiyu Ma, Jian Xin Zhang, Yanhui Chen, Jianfei Zhang, B.-B. Zhang, Yinong Liu

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7 Citations (Scopus)

Abstract

M23C6 carbide is a common precipitate phase present in Ni-based superalloys. The carbide is generally an alloy carbine and often contains more than one metallic element. In this study, the site preference of metallic elements in M23C6 carbide in a Ni-based single crystal was determined by means of aberration-corrected High-Angle Annular Dark Field Scanning Transmission Electron Microscopy (HAADF-STEM) technique and quantitative STEM (QSTEM)-based image simulation method. The carbide was found to contain mostly Cr and Re, with a small amount of Mo. The HAADF-STEM and QSTEM-based simulation analyses indicate that heavy atoms prefer to substitute Cr at 8c sites.

Original languageEnglish
Pages (from-to)9-14
Number of pages6
JournalMaterials and Design
Volume129
DOIs
Publication statusPublished - 5 Sep 2017

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