On the effect of elemental partitioning to secondary phases after solution and aging heat treatments in a Co-Ni-based superalloy

Alessio M. S. Costa; João Pedro Oliveira; J. D. Escobar; C. A. F. Salvador; M. J. Monteiro; J. D. Poplawsky; Carlos Ângelo Nunes; A. J. Ramirez; A. P. Tschiptschin

doi:10.1016/j.matlet.2021.131377

On the effect of elemental partitioning to secondary phases after solution and aging heat treatments in a Co-Ni-based superalloy

Alessio M. S. Costa, João Pedro Oliveira, J. D. Escobar, C. A. F. Salvador, M. J. Monteiro, J. D. Poplawsky, Carlos Ângelo Nunes, A. J. Ramirez, A. P. Tschiptschin

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2 Citations (Scopus)

Abstract

This paper presents the phase stability and elemental partitioning in a Co-40Ni-10Al-7.5W-10Cr-3Nb-0.06B-0.6C (at.%) superalloy (referred to as 3Nb) after a two-step heat treatment. The resulting microstructure consisted of γ, γ′, MC carbides and µ-Co₇W₆ phase decorating the regions near and at the grain boundaries. Nb preferentially partitioned to the γ′-phase and other elements such as Ni, Cr and W were responsible for the μ-phase formation.

Original language	English
Article number	131377
Journal	Materials Letters
Volume	309
DOIs	https://doi.org/10.1016/j.matlet.2021.131377
Publication status	Published - 15 Feb 2022

Keywords

Atom probe tomography
Co-Ni-based superalloys
EBSD
Nb-modified
Phase stability
Thermodynamic simulation

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10.1016/j.matlet.2021.131377

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Costa, A. M. S., Oliveira, J. P., Escobar, J. D., Salvador, C. A. F., Monteiro, M. J., Poplawsky, J. D., Nunes, C. Â., Ramirez, A. J., & Tschiptschin, A. P. (2022). On the effect of elemental partitioning to secondary phases after solution and aging heat treatments in a Co-Ni-based superalloy. Materials Letters, 309, Article 131377. https://doi.org/10.1016/j.matlet.2021.131377

@article{f15303d359b24a9f8f5c5d0dcbf3a7bd,

title = "On the effect of elemental partitioning to secondary phases after solution and aging heat treatments in a Co-Ni-based superalloy",

abstract = "This paper presents the phase stability and elemental partitioning in a Co-40Ni-10Al-7.5W-10Cr-3Nb-0.06B-0.6C (at.\%) superalloy (referred to as 3Nb) after a two-step heat treatment. The resulting microstructure consisted of γ, γ′, MC carbides and µ-Co7W6 phase decorating the regions near and at the grain boundaries. Nb preferentially partitioned to the γ′-phase and other elements such as Ni, Cr and W were responsible for the μ-phase formation.",

keywords = "Atom probe tomography, Co-Ni-based superalloys, EBSD, Nb-modified, Phase stability, Thermodynamic simulation",

author = "Costa, \{Alessio M. S.\} and Oliveira, \{Jo{\~a}o Pedro\} and Escobar, \{J. D.\} and Salvador, \{C. A. F.\} and Monteiro, \{M. J.\} and Poplawsky, \{J. D.\} and Nunes, \{Carlos {\^A}ngelo\} and Ramirez, \{A. J.\} and Tschiptschin, \{A. P.\}",

note = "Funding Information: The authors thank Dr. Johnnatan Rodriguez for his help in SEM EBSD analysis. APT was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility. JPO acknowledges Funda??o para a Ci?ncia e a Tecnologia (FCT ? MCTES) for its financial support via the project UID/00667/2020 (UNIDEMI) Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2022",

month = feb,

day = "15",

doi = "10.1016/j.matlet.2021.131377",

language = "English",

volume = "309",

journal = "Materials Letters",

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TY - JOUR

T1 - On the effect of elemental partitioning to secondary phases after solution and aging heat treatments in a Co-Ni-based superalloy

AU - Costa, Alessio M. S.

AU - Oliveira, João Pedro

AU - Escobar, J. D.

AU - Salvador, C. A. F.

AU - Monteiro, M. J.

AU - Poplawsky, J. D.

AU - Nunes, Carlos Ângelo

AU - Ramirez, A. J.

AU - Tschiptschin, A. P.

N1 - Funding Information: The authors thank Dr. Johnnatan Rodriguez for his help in SEM EBSD analysis. APT was conducted at ORNL's Center for Nanophase Materials Sciences (CNMS), which is a U.S. DOE Office of Science User Facility. JPO acknowledges Funda??o para a Ci?ncia e a Tecnologia (FCT ? MCTES) for its financial support via the project UID/00667/2020 (UNIDEMI) Publisher Copyright: © 2021 Elsevier B.V.

PY - 2022/2/15

Y1 - 2022/2/15

N2 - This paper presents the phase stability and elemental partitioning in a Co-40Ni-10Al-7.5W-10Cr-3Nb-0.06B-0.6C (at.%) superalloy (referred to as 3Nb) after a two-step heat treatment. The resulting microstructure consisted of γ, γ′, MC carbides and µ-Co7W6 phase decorating the regions near and at the grain boundaries. Nb preferentially partitioned to the γ′-phase and other elements such as Ni, Cr and W were responsible for the μ-phase formation.

AB - This paper presents the phase stability and elemental partitioning in a Co-40Ni-10Al-7.5W-10Cr-3Nb-0.06B-0.6C (at.%) superalloy (referred to as 3Nb) after a two-step heat treatment. The resulting microstructure consisted of γ, γ′, MC carbides and µ-Co7W6 phase decorating the regions near and at the grain boundaries. Nb preferentially partitioned to the γ′-phase and other elements such as Ni, Cr and W were responsible for the μ-phase formation.

KW - Atom probe tomography

KW - Co-Ni-based superalloys

KW - EBSD

KW - Nb-modified

KW - Phase stability

KW - Thermodynamic simulation

UR - https://www.scopus.com/pages/publications/85120807027

U2 - 10.1016/j.matlet.2021.131377

DO - 10.1016/j.matlet.2021.131377

M3 - Article

AN - SCOPUS:85120807027

SN - 0167-577X

VL - 309

JO - Materials Letters

JF - Materials Letters

M1 - 131377

ER -

On the effect of elemental partitioning to secondary phases after solution and aging heat treatments in a Co-Ni-based superalloy

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