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Title: Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel
Authors: Jiao, ZB 
Luan, JH
Guo, W
Poplawsky, JD
Liu, CT
Keywords: Atom-probe tomography
Cu and NiAl precipitate
High-strength steel
Interfacial segregation
Nanoscale precipitation
Issue Date: 2017
Publisher: Taylor & Francis
Source: Materials research letters, 2017, v. 5, no. 15, p. 562-568 How to cite?
Journal: Materials research letters 
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.
EISSN: 2166-3831
DOI: 10.1080/21663831.2017.1364675
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