Temporal evolution of the γ(fcc)/γ′(L12) interfacial width in binary Ni-Al alloys

Elizaveta Y. Plotnikov; Zugang Mao; Ronald D. Noebe; David N. Seidman

doi:10.1016/j.scriptamat.2013.09.016

Temporal evolution of the γ(fcc)/γ′(L1₂) interfacial width in binary Ni-Al alloys

Elizaveta Y. Plotnikov, Zugang Mao, Ronald D. Noebe, David N. Seidman^*

^*Corresponding author for this work

Materials Science and Engineering

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

36 Scopus citations

Abstract

The temporal evolution of γ′(L1₂ structure) precipitates is studied in Ni-12.5 at.% Al and Ni-13.4 at.% Al alloys, aged at 823 and 873 K, utilizing three-dimensional atom-probe tomography. The values of the interfacial widths, δ(t)s, between the γ(face-centered cubic) and γ′ phases are calculated utilizing proximity histograms. It is demonstrated that δ(t) decreases continuously with increasing aging time for both Ni-Al alloys: that is, the δ(t)s decrease with increasing mean precipitate radius, 〈R(t)〉. The ratio δ(t)/〈R(t)〉 decreases, to first order, as 〈R(t)〉^-1.

Original language	English (US)
Pages (from-to)	51-54
Number of pages	4
Journal	Scripta Materialia
Volume	70
Issue number	1
DOIs	https://doi.org/10.1016/j.scriptamat.2013.09.016
State	Published - Jan 1 2014

Keywords

Atom-probe tomography
Interfacial width
Nickel-aluminum alloys
Vacancy-mediated lattice kinetic Monte Carlo simulations

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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title = "Temporal evolution of the γ(fcc)/γ′(L12) interfacial width in binary Ni-Al alloys",

abstract = "The temporal evolution of γ′(L12 structure) precipitates is studied in Ni-12.5 at.% Al and Ni-13.4 at.% Al alloys, aged at 823 and 873 K, utilizing three-dimensional atom-probe tomography. The values of the interfacial widths, δ(t)s, between the γ(face-centered cubic) and γ′ phases are calculated utilizing proximity histograms. It is demonstrated that δ(t) decreases continuously with increasing aging time for both Ni-Al alloys: that is, the δ(t)s decrease with increasing mean precipitate radius, 〈R(t)〉. The ratio δ(t)/〈R(t)〉 decreases, to first order, as 〈R(t)〉-1.",

keywords = "Atom-probe tomography, Interfacial width, Nickel-aluminum alloys, Vacancy-mediated lattice kinetic Monte Carlo simulations",

author = "Plotnikov, {Elizaveta Y.} and Zugang Mao and Noebe, {Ronald D.} and Seidman, {David N.}",

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T1 - Temporal evolution of the γ(fcc)/γ′(L12) interfacial width in binary Ni-Al alloys

AU - Plotnikov, Elizaveta Y.

AU - Mao, Zugang

AU - Noebe, Ronald D.

AU - Seidman, David N.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - The temporal evolution of γ′(L12 structure) precipitates is studied in Ni-12.5 at.% Al and Ni-13.4 at.% Al alloys, aged at 823 and 873 K, utilizing three-dimensional atom-probe tomography. The values of the interfacial widths, δ(t)s, between the γ(face-centered cubic) and γ′ phases are calculated utilizing proximity histograms. It is demonstrated that δ(t) decreases continuously with increasing aging time for both Ni-Al alloys: that is, the δ(t)s decrease with increasing mean precipitate radius, 〈R(t)〉. The ratio δ(t)/〈R(t)〉 decreases, to first order, as 〈R(t)〉-1.

AB - The temporal evolution of γ′(L12 structure) precipitates is studied in Ni-12.5 at.% Al and Ni-13.4 at.% Al alloys, aged at 823 and 873 K, utilizing three-dimensional atom-probe tomography. The values of the interfacial widths, δ(t)s, between the γ(face-centered cubic) and γ′ phases are calculated utilizing proximity histograms. It is demonstrated that δ(t) decreases continuously with increasing aging time for both Ni-Al alloys: that is, the δ(t)s decrease with increasing mean precipitate radius, 〈R(t)〉. The ratio δ(t)/〈R(t)〉 decreases, to first order, as 〈R(t)〉-1.

KW - Atom-probe tomography

KW - Interfacial width

KW - Nickel-aluminum alloys

KW - Vacancy-mediated lattice kinetic Monte Carlo simulations

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