Atomic resolution imaging of precipitate transformation from cubic TaN to tetragonal CrTaN

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Atomic resolution imaging of precipitate transformation from cubic TaN to tetragonal CrTaN. / Danielsen, Hilmar Kjartansson; Hald, John; Somers, Marcel A. J.

In: Scripta Materialia, Vol. 66, No. 5, 2012, p. 261-264.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Danielsen, Hilmar Kjartansson; Hald, John; Somers, Marcel A. J. / Atomic resolution imaging of precipitate transformation from cubic TaN to tetragonal CrTaN.

In: Scripta Materialia, Vol. 66, No. 5, 2012, p. 261-264.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{d98a751326bf4f9e97425932cfc569a4,
title = "Atomic resolution imaging of precipitate transformation from cubic TaN to tetragonal CrTaN",
keywords = "Heat-resistant steels, Nitrides, High-resolution electron microscopy (HREM), Crystal structure, Phase transformations",
publisher = "Pergamon",
author = "Danielsen, {Hilmar Kjartansson} and John Hald and Somers, {Marcel A. J.}",
year = "2012",
doi = "10.1016/j.scriptamat.2011.11.005",
volume = "66",
number = "5",
pages = "261--264",
journal = "Scripta Materialia",
issn = "1359-6462",

}

RIS

TY - JOUR

T1 - Atomic resolution imaging of precipitate transformation from cubic TaN to tetragonal CrTaN

A1 - Danielsen,Hilmar Kjartansson

A1 - Hald,John

A1 - Somers,Marcel A. J.

AU - Danielsen,Hilmar Kjartansson

AU - Hald,John

AU - Somers,Marcel A. J.

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - In 9–12% Cr creep-resistant steels Cr(V,Nb,Ta)N Z-phase is known to replace metastable (V,Nb,Ta)N MN precipitates at high temperatures. The precipitation process of Z-phase does not follow the classical nucleation theory, where dissolving MN particles provide constituents for Z-phase nucleation in the matrix. Using atomic resolution transmission electron microscopy, the current work demonstrates that metastable cubic TaN precipitates in a complex steel gradually transform compositionally and crystallographically into stable tetragonal CrTaN precipitates under the influence of Cr indiffusion from the steel matrix.

AB - In 9–12% Cr creep-resistant steels Cr(V,Nb,Ta)N Z-phase is known to replace metastable (V,Nb,Ta)N MN precipitates at high temperatures. The precipitation process of Z-phase does not follow the classical nucleation theory, where dissolving MN particles provide constituents for Z-phase nucleation in the matrix. Using atomic resolution transmission electron microscopy, the current work demonstrates that metastable cubic TaN precipitates in a complex steel gradually transform compositionally and crystallographically into stable tetragonal CrTaN precipitates under the influence of Cr indiffusion from the steel matrix.

KW - Heat-resistant steels

KW - Nitrides

KW - High-resolution electron microscopy (HREM)

KW - Crystal structure

KW - Phase transformations

U2 - 10.1016/j.scriptamat.2011.11.005

DO - 10.1016/j.scriptamat.2011.11.005

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

IS - 5

VL - 66

SP - 261

EP - 264

ER -