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

doi:10.1016/j.matdes.2017.05.023

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

Research output: Contribution to journal › Article

11 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 language	English
Pages (from-to)	9-14
Number of pages	6
Journal	Materials and Design
Volume	129
DOIs	https://doi.org/10.1016/j.matdes.2017.05.023
Publication status	Published - 5 Sep 2017

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10.1016/j.matdes.2017.05.023

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title = "Site preference of metallic elements in M23C6 carbide in a Ni-based single crystal superalloy",

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.",

keywords = "Aberration-corrected HAADF-STEM, Carbides, Creep, Ni-based superalloy, Rhenium",

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

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doi = "10.1016/j.matdes.2017.05.023",

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T1 - Site preference of metallic elements in M23C6 carbide in a Ni-based single crystal superalloy

AU - Xiang, Sisi

AU - Mao, Shengcheng

AU - Shen, Zhenju

AU - Long, Haibo

AU - Wei, Hua

AU - Ma, Shiyu

AU - Zhang, Jian Xin

AU - Chen, Yanhui

AU - Zhang, Jianfei

AU - Zhang, B.-B.

AU - Liu, Yinong

PY - 2017/9/5

Y1 - 2017/9/5

N2 - 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.

AB - 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.

KW - Aberration-corrected HAADF-STEM

KW - Carbides

KW - Creep

KW - Ni-based superalloy

KW - Rhenium

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