Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel

Z. B. Jiao; J. H. Luan; W. Guo; J. D. Poplawsky; C. T. Liu

doi:10.1080/21663831.2017.1364675

Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel

Z. B. Jiao
, J. H. Luan
, W. Guo
, J. D. Poplawsky
, C. T. Liu^*

^*Corresponding author for this work

Centre for Advanced Structural Materials

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

48 Citations (Scopus)

69 Downloads (CityUHK Scholars)

Abstract

The Cu and NiAl nanoscale precipitation and interfacial segregation in the martensite and austenite phases within a high-strength steel were studied by atom-probe tomography (APT). In the martensite phase, APT reveals the precipitation of isolated NiAl nanoparticles and NiAl/Cu co-precipitates, indicating that NiAl nanoparticles form first in the precipitation sequence. In comparison, the austenite phase contains only Cu nanoparticles with Ni segregation at the particle/matrix interface, in which the Ni segregation reduces the Cu nanoparticle interfacial energy. In addition, Mn and C exhibit an enrichment at the martensite/austenite interface, and the mechanism for the interfacial segregation was also discussed.

Original language	English
Pages (from-to)	562-568
Journal	Materials Research Letters
Volume	5
Issue number	8
Online published	14 Aug 2017
DOIs	https://doi.org/10.1080/21663831.2017.1364675
Publication status	Published - 2017

Research Keywords

atom-probe tomography
Cu and NiAl precipitate
high-strength steel
interfacial segregation
nanoscale precipitation

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This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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title = "Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel",

abstract = "The Cu and NiAl nanoscale precipitation and interfacial segregation in the martensite and austenite phases within a high-strength steel were studied by atom-probe tomography (APT). In the martensite phase, APT reveals the precipitation of isolated NiAl nanoparticles and NiAl/Cu co-precipitates, indicating that NiAl nanoparticles form first in the precipitation sequence. In comparison, the austenite phase contains only Cu nanoparticles with Ni segregation at the particle/matrix interface, in which the Ni segregation reduces the Cu nanoparticle interfacial energy. In addition, Mn and C exhibit an enrichment at the martensite/austenite interface, and the mechanism for the interfacial segregation was also discussed.",

keywords = "atom-probe tomography, Cu and NiAl precipitate, high-strength steel, interfacial segregation, nanoscale precipitation",

author = "Jiao, \{Z. B.\} and Luan, \{J. H.\} and W. Guo and Poplawsky, \{J. D.\} and Liu, \{C. T.\}",

year = "2017",

doi = "10.1080/21663831.2017.1364675",

language = "English",

volume = "5",

pages = "562--568",

journal = "Materials Research Letters",

issn = "2166-3831",

publisher = "Taylor \& Francis",

number = "8",

}

TY - JOUR

T1 - Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel

AU - Jiao, Z. B.

AU - Luan, J. H.

AU - Guo, W.

AU - Poplawsky, J. D.

AU - Liu, C. T.

PY - 2017

Y1 - 2017

N2 - The Cu and NiAl nanoscale precipitation and interfacial segregation in the martensite and austenite phases within a high-strength steel were studied by atom-probe tomography (APT). In the martensite phase, APT reveals the precipitation of isolated NiAl nanoparticles and NiAl/Cu co-precipitates, indicating that NiAl nanoparticles form first in the precipitation sequence. In comparison, the austenite phase contains only Cu nanoparticles with Ni segregation at the particle/matrix interface, in which the Ni segregation reduces the Cu nanoparticle interfacial energy. In addition, Mn and C exhibit an enrichment at the martensite/austenite interface, and the mechanism for the interfacial segregation was also discussed.

AB - The Cu and NiAl nanoscale precipitation and interfacial segregation in the martensite and austenite phases within a high-strength steel were studied by atom-probe tomography (APT). In the martensite phase, APT reveals the precipitation of isolated NiAl nanoparticles and NiAl/Cu co-precipitates, indicating that NiAl nanoparticles form first in the precipitation sequence. In comparison, the austenite phase contains only Cu nanoparticles with Ni segregation at the particle/matrix interface, in which the Ni segregation reduces the Cu nanoparticle interfacial energy. In addition, Mn and C exhibit an enrichment at the martensite/austenite interface, and the mechanism for the interfacial segregation was also discussed.

KW - atom-probe tomography

KW - Cu and NiAl precipitate

KW - high-strength steel

KW - interfacial segregation

KW - nanoscale precipitation

UR - https://www.scopus.com/pages/publications/85028537875

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85028537875&origin=recordpage

U2 - 10.1080/21663831.2017.1364675

DO - 10.1080/21663831.2017.1364675

M3 - RGC 21 - Publication in refereed journal

SN - 2166-3831

VL - 5

SP - 562

EP - 568

JO - Materials Research Letters

JF - Materials Research Letters

IS - 8

ER -

Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel

Abstract

Research Keywords

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CRF: Three-dimensional (3D) Atom Probe Facility for Characterization of Advanced Materials Research at Atomic- and Nano-scales

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Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel

Abstract

Research Keywords

Publisher's Copyright Statement

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CRF: Three-dimensional (3D) Atom Probe Facility for Characterization of Advanced Materials Research at Atomic- and Nano-scales

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