Nanoscale studies of the chemistry of a René N6 superalloy

Kevin E. Yoon; Dieter Isheim; Ronald D. Noebe; David N. Seidman

doi:10.1023/A:1015158728191

Nanoscale studies of the chemistry of a René N6 superalloy

Kevin E. Yoon, Dieter Isheim, Ronald D. Noebe, David N. Seidman^*

^*Corresponding author for this work

Materials Science and Engineering

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

58 Scopus citations

Abstract

Atom-probe field-ion microscopy (APFIM) is used to study partitioning of the alloying elements between the γ (FCC) and γ′ (L1₂) phases and their segregation behavior at γ/γ′ interfaces of a René N6 nickel-based superalloy. The atomic-scale resolution and real space reconstruction capability for elemental chemical mapping makes three-dimensional atom-probe microscopy especially suitable for subnanoscale investigations of complex multicomponent superalloys. Concentration profiles of this alloy, obtained from an atom probe analysis, reveal the partitioning behavior of the alloying elements in René N6. As anticipated, the matrix strengtheners, such as Mo and W, are partitioned to the γ (FCC) matrix, while Re segregates at the γ/γ′ interfaces; the Gibbsian interfacial excess of Re is determined by both one-dimensional (2.32 atoms nm^-2) and three-dimensional atom-probe microscopies (3.92 atoms nm^-2) and the values obtained are in reasonable agreement.

Original language	English (US)
Pages (from-to)	249-255
Number of pages	7
Journal	Interface Science
Volume	9
Issue number	3-4
DOIs	https://doi.org/10.1023/A:1015158728191
State	Published - Nov 2001

Funding

This research was sponsored by the National Science Foundation. Kevin E. Yoon was supported by a NASA Traineeship and R. D. Noebe acknowledges support from the NASA Glenn HOTPC program. René N6 alloys were supplied by Dr. Scott Walston at General Electric Aircraft Engines. Special thanks to all the members of our research group for valuable discussions.

Keywords

Gibbsian interfacial excesses
Nickel-based superalloy
Rhenium
Three-dimensional atom-probe microscopy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Materials Science
Condensed Matter Physics

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title = "Nanoscale studies of the chemistry of a Ren{\'e} N6 superalloy",

abstract = "Atom-probe field-ion microscopy (APFIM) is used to study partitioning of the alloying elements between the γ (FCC) and γ′ (L12) phases and their segregation behavior at γ/γ′ interfaces of a Ren{\'e} N6 nickel-based superalloy. The atomic-scale resolution and real space reconstruction capability for elemental chemical mapping makes three-dimensional atom-probe microscopy especially suitable for subnanoscale investigations of complex multicomponent superalloys. Concentration profiles of this alloy, obtained from an atom probe analysis, reveal the partitioning behavior of the alloying elements in Ren{\'e} N6. As anticipated, the matrix strengtheners, such as Mo and W, are partitioned to the γ (FCC) matrix, while Re segregates at the γ/γ′ interfaces; the Gibbsian interfacial excess of Re is determined by both one-dimensional (2.32 atoms nm-2) and three-dimensional atom-probe microscopies (3.92 atoms nm-2) and the values obtained are in reasonable agreement.",

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author = "Yoon, {Kevin E.} and Dieter Isheim and Noebe, {Ronald D.} and Seidman, {David N.}",

note = "Funding Information: This research was sponsored by the National Science Foundation. Kevin E. Yoon was supported by a NASA Traineeship and R. D. Noebe acknowledges support from the NASA Glenn HOTPC program. Ren{\'e} N6 alloys were supplied by Dr. Scott Walston at General Electric Aircraft Engines. Special thanks to all the members of our research group for valuable discussions.",

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doi = "10.1023/A:1015158728191",

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AU - Isheim, Dieter

AU - Noebe, Ronald D.

AU - Seidman, David N.

N1 - Funding Information: This research was sponsored by the National Science Foundation. Kevin E. Yoon was supported by a NASA Traineeship and R. D. Noebe acknowledges support from the NASA Glenn HOTPC program. René N6 alloys were supplied by Dr. Scott Walston at General Electric Aircraft Engines. Special thanks to all the members of our research group for valuable discussions.

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N2 - Atom-probe field-ion microscopy (APFIM) is used to study partitioning of the alloying elements between the γ (FCC) and γ′ (L12) phases and their segregation behavior at γ/γ′ interfaces of a René N6 nickel-based superalloy. The atomic-scale resolution and real space reconstruction capability for elemental chemical mapping makes three-dimensional atom-probe microscopy especially suitable for subnanoscale investigations of complex multicomponent superalloys. Concentration profiles of this alloy, obtained from an atom probe analysis, reveal the partitioning behavior of the alloying elements in René N6. As anticipated, the matrix strengtheners, such as Mo and W, are partitioned to the γ (FCC) matrix, while Re segregates at the γ/γ′ interfaces; the Gibbsian interfacial excess of Re is determined by both one-dimensional (2.32 atoms nm-2) and three-dimensional atom-probe microscopies (3.92 atoms nm-2) and the values obtained are in reasonable agreement.

AB - Atom-probe field-ion microscopy (APFIM) is used to study partitioning of the alloying elements between the γ (FCC) and γ′ (L12) phases and their segregation behavior at γ/γ′ interfaces of a René N6 nickel-based superalloy. The atomic-scale resolution and real space reconstruction capability for elemental chemical mapping makes three-dimensional atom-probe microscopy especially suitable for subnanoscale investigations of complex multicomponent superalloys. Concentration profiles of this alloy, obtained from an atom probe analysis, reveal the partitioning behavior of the alloying elements in René N6. As anticipated, the matrix strengtheners, such as Mo and W, are partitioned to the γ (FCC) matrix, while Re segregates at the γ/γ′ interfaces; the Gibbsian interfacial excess of Re is determined by both one-dimensional (2.32 atoms nm-2) and three-dimensional atom-probe microscopies (3.92 atoms nm-2) and the values obtained are in reasonable agreement.

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Nanoscale studies of the chemistry of a René N6 superalloy

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