Influence of cobalt addition on microstructure and hot workability of IN713C superalloy

Yunping Li; Xianjuan Ye; Jiaxiang Li; Yi Zhang; Yuichiro Koizumi; Akihiko Chiba

doi:10.1016/j.matdes.2017.03.014

Influence of cobalt addition on microstructure and hot workability of IN713C superalloy

Yunping Li, Xianjuan Ye, Jiaxiang Li, Yi Zhang, Yuichiro Koizumi, Akihiko Chiba

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

In the present research, the influence of Co addition on the microstructure and hot workability of IN713C alloy was investigated in detail by scanning electron microscope (SEM), transition electron microscope (TEM) and electron backscattering diffraction (EBSD) etc. Substitution of Ni by Co leads to lower driving force for formation of γ′ phase. In addition, with the increase of Co fraction, the γ′ phase precipitates turned finer and more cuboidal shape. As a result, the hot workability of IN713C alloy was improved significantly by Co addition. This can be ascribed to the decrease in activation energy, misfit between γ/γ′ phase lattice, the stacking fault energy as well as the fraction of γ′ phase at elevated temperature after adding Co.

Original language	English
Pages (from-to)	340-346
Number of pages	7
Journal	Materials and Design
Volume	122
DOIs	https://doi.org/10.1016/j.matdes.2017.03.014
Publication status	Published - 2017 May 15

Keywords

Cobalt addition
DRX
Hot workability
Misfit
SFE
Superalloy

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10.1016/j.matdes.2017.03.014

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title = "Influence of cobalt addition on microstructure and hot workability of IN713C superalloy",

abstract = "In the present research, the influence of Co addition on the microstructure and hot workability of IN713C alloy was investigated in detail by scanning electron microscope (SEM), transition electron microscope (TEM) and electron backscattering diffraction (EBSD) etc. Substitution of Ni by Co leads to lower driving force for formation of γ′ phase. In addition, with the increase of Co fraction, the γ′ phase precipitates turned finer and more cuboidal shape. As a result, the hot workability of IN713C alloy was improved significantly by Co addition. This can be ascribed to the decrease in activation energy, misfit between γ/γ′ phase lattice, the stacking fault energy as well as the fraction of γ′ phase at elevated temperature after adding Co.",

keywords = "Cobalt addition, DRX, Hot workability, Misfit, SFE, Superalloy",

author = "Yunping Li and Xianjuan Ye and Jiaxiang Li and Yi Zhang and Yuichiro Koizumi and Akihiko Chiba",

note = "Funding Information: The authors gratefully acknowledge the financial support from project of The Science Fund for Distinguished Young Scholars of Hunan Province, China (2016JJ1016), Fund of State Key Lab for Powder Metallurgy, Central South University. Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

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day = "15",

doi = "10.1016/j.matdes.2017.03.014",

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T1 - Influence of cobalt addition on microstructure and hot workability of IN713C superalloy

AU - Li, Yunping

AU - Ye, Xianjuan

AU - Li, Jiaxiang

AU - Zhang, Yi

AU - Koizumi, Yuichiro

AU - Chiba, Akihiko

N1 - Funding Information: The authors gratefully acknowledge the financial support from project of The Science Fund for Distinguished Young Scholars of Hunan Province, China (2016JJ1016), Fund of State Key Lab for Powder Metallurgy, Central South University. Publisher Copyright: © 2017 Elsevier Ltd

PY - 2017/5/15

Y1 - 2017/5/15

N2 - In the present research, the influence of Co addition on the microstructure and hot workability of IN713C alloy was investigated in detail by scanning electron microscope (SEM), transition electron microscope (TEM) and electron backscattering diffraction (EBSD) etc. Substitution of Ni by Co leads to lower driving force for formation of γ′ phase. In addition, with the increase of Co fraction, the γ′ phase precipitates turned finer and more cuboidal shape. As a result, the hot workability of IN713C alloy was improved significantly by Co addition. This can be ascribed to the decrease in activation energy, misfit between γ/γ′ phase lattice, the stacking fault energy as well as the fraction of γ′ phase at elevated temperature after adding Co.

AB - In the present research, the influence of Co addition on the microstructure and hot workability of IN713C alloy was investigated in detail by scanning electron microscope (SEM), transition electron microscope (TEM) and electron backscattering diffraction (EBSD) etc. Substitution of Ni by Co leads to lower driving force for formation of γ′ phase. In addition, with the increase of Co fraction, the γ′ phase precipitates turned finer and more cuboidal shape. As a result, the hot workability of IN713C alloy was improved significantly by Co addition. This can be ascribed to the decrease in activation energy, misfit between γ/γ′ phase lattice, the stacking fault energy as well as the fraction of γ′ phase at elevated temperature after adding Co.

KW - Cobalt addition

KW - DRX

KW - Hot workability

KW - Misfit

KW - SFE

KW - Superalloy

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SP - 340

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JO - Materials and Design

JF - Materials and Design

ER -

Influence of cobalt addition on microstructure and hot workability of IN713C superalloy

Abstract

Keywords

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