Growth accidents induced by primary γ′ precipitates in a polycrystalline nickel-based superalloy

M. A. Charpagne; A. T. Polonsky; M. P. Echlin; S. Jacomet; J. de Jaeger; M. De Graef; N. Bozzolo; T. M. Pollock

doi:10.1016/j.scriptamat.2020.05.020

Growth accidents induced by primary γ′ precipitates in a polycrystalline nickel-based superalloy

M. A. Charpagne, A. T. Polonsky, M. P. Echlin, S. Jacomet, J. de Jaeger, M. De Graef, N. Bozzolo, T. M. Pollock

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

Abstract

The development of overgrown grains during sub-solvus annealing of a polycrystalline γ−γ^′ nickel-base alloy is investigated, with special emphasis on the primary γ′ precipitates. Quantitative analysis conducted on a large three-dimensional electron back-scattered diffraction dataset reveals a high fraction of γ′ precipitates on the annealing twin boundaries in the large grains. When observed in-situ in a scanning electron microscope, the formation of annealing twins is correlated to the crossing of γ′ precipitates by moving grain boundaries. The role of precipitates in the occurrence of growth accidents is discussed.

Original language	English (US)
Pages (from-to)	109-113
Number of pages	5
Journal	Scripta Materialia
Volume	186
DOIs	https://doi.org/10.1016/j.scriptamat.2020.05.020
State	Published - Sep 2020
Externally published	Yes

Keywords

3D EBSD
Annealing twin boundaries
Critical recrystallization
Nickel-base superalloy
Recrystallization

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Online availability

10.1016/j.scriptamat.2020.05.020

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@article{266234be167c4fe59b4c4c75187d3cff,

title = "Growth accidents induced by primary γ′ precipitates in a polycrystalline nickel-based superalloy",

abstract = "The development of overgrown grains during sub-solvus annealing of a polycrystalline γ−γ′ nickel-base alloy is investigated, with special emphasis on the primary γ′ precipitates. Quantitative analysis conducted on a large three-dimensional electron back-scattered diffraction dataset reveals a high fraction of γ′ precipitates on the annealing twin boundaries in the large grains. When observed in-situ in a scanning electron microscope, the formation of annealing twins is correlated to the crossing of γ′ precipitates by moving grain boundaries. The role of precipitates in the occurrence of growth accidents is discussed.",

keywords = "3D EBSD, Annealing twin boundaries, Critical recrystallization, Nickel-base superalloy, Recrystallization",

author = "Charpagne, {M. A.} and Polonsky, {A. T.} and Echlin, {M. P.} and S. Jacomet and {de Jaeger}, J. and {De Graef}, M. and N. Bozzolo and Pollock, {T. M.}",

note = "Funding Information: MAC, SJ and NB acknowledge the support fromthe French Agency for Scientific Research (ANR) and from the Safran group, via the industrial chair ANR-Safran OPALE. MDG wishes to acknowledge funding from a DoD Vannevar-Bush Faculty Fellowship (# N00014-16-1-2821) as well as the computational facilities of the Materials Characterization Facility at CMU under grant # MCF-677785. MAC, TMP, ATP, and MPE gratefully acknowledge the support of Vannevar-Bush Fellowship Program, grant # N00014-18-1-3031. Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc.",

year = "2020",

month = sep,

doi = "10.1016/j.scriptamat.2020.05.020",

language = "English (US)",

volume = "186",

pages = "109--113",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Growth accidents induced by primary γ′ precipitates in a polycrystalline nickel-based superalloy

AU - Charpagne, M. A.

AU - Polonsky, A. T.

AU - Echlin, M. P.

AU - Jacomet, S.

AU - de Jaeger, J.

AU - De Graef, M.

AU - Bozzolo, N.

AU - Pollock, T. M.

N1 - Funding Information: MAC, SJ and NB acknowledge the support fromthe French Agency for Scientific Research (ANR) and from the Safran group, via the industrial chair ANR-Safran OPALE. MDG wishes to acknowledge funding from a DoD Vannevar-Bush Faculty Fellowship (# N00014-16-1-2821) as well as the computational facilities of the Materials Characterization Facility at CMU under grant # MCF-677785. MAC, TMP, ATP, and MPE gratefully acknowledge the support of Vannevar-Bush Fellowship Program, grant # N00014-18-1-3031. Publisher Copyright: © 2020 Acta Materialia Inc.

PY - 2020/9

Y1 - 2020/9

N2 - The development of overgrown grains during sub-solvus annealing of a polycrystalline γ−γ′ nickel-base alloy is investigated, with special emphasis on the primary γ′ precipitates. Quantitative analysis conducted on a large three-dimensional electron back-scattered diffraction dataset reveals a high fraction of γ′ precipitates on the annealing twin boundaries in the large grains. When observed in-situ in a scanning electron microscope, the formation of annealing twins is correlated to the crossing of γ′ precipitates by moving grain boundaries. The role of precipitates in the occurrence of growth accidents is discussed.

AB - The development of overgrown grains during sub-solvus annealing of a polycrystalline γ−γ′ nickel-base alloy is investigated, with special emphasis on the primary γ′ precipitates. Quantitative analysis conducted on a large three-dimensional electron back-scattered diffraction dataset reveals a high fraction of γ′ precipitates on the annealing twin boundaries in the large grains. When observed in-situ in a scanning electron microscope, the formation of annealing twins is correlated to the crossing of γ′ precipitates by moving grain boundaries. The role of precipitates in the occurrence of growth accidents is discussed.

KW - 3D EBSD

KW - Annealing twin boundaries

KW - Critical recrystallization

KW - Nickel-base superalloy

KW - Recrystallization

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M3 - Article

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SN - 1359-6462

VL - 186

SP - 109

EP - 113

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Growth accidents induced by primary γ′ precipitates in a polycrystalline nickel-based superalloy

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