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

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.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [2]
  1. City Univ. of Hong Kong (China). Center for Advanced Structural Materials. Dept. of Mechanical and Biomedical Engineering. College of Science and Engineering; The Hong Kong Polytechnic Univ. (China). Dept. of Mechanical Engineering
  2. City Univ. of Hong Kong (China). Center for Advanced Structural Materials. Dept. of Mechanical and Biomedical Engineering. College of Science and Engineering
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences
Publication Date:
Grant/Contract Number:
AC05-00OR22725; 7004686; CityU11205515; C1027-14E
Type:
Accepted Manuscript
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 5; Journal Issue: 8; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); City Univ. of Hong Kong (China)
Sponsoring Org:
USDOE Office of Science (SC); City Univ. of Hong Kong (China); General Research Fund, Hong Kong (China); Collaborative Research Fund, Hong Kong (China); Research Grant Council, Hong Kong (China)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Cu and NiAl precipitate; nanoscale precipitation; interfacial segregation; high-strength steel; atom-probe tomography
OSTI Identifier:
1474732

Jiao, Z. B., Luan, J. H., Guo, W., Poplawsky, J. D., and Liu, C. T.. Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel. United States: N. p., Web. doi:10.1080/21663831.2017.1364675.
Jiao, Z. B., Luan, J. H., Guo, W., Poplawsky, J. D., & Liu, C. T.. Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel. United States. doi:10.1080/21663831.2017.1364675.
Jiao, Z. B., Luan, J. H., Guo, W., Poplawsky, J. D., and Liu, C. T.. 2017. "Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel". United States. doi:10.1080/21663831.2017.1364675. https://www.osti.gov/servlets/purl/1474732.
@article{osti_1474732,
title = {Atom-probe study of Cu and NiAl nanoscale precipitation and interfacial segregation in a nanoparticle-strengthened steel},
author = {Jiao, Z. B. and Luan, J. H. and Guo, W. and Poplawsky, J. D. and Liu, C. T.},
abstractNote = {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.},
doi = {10.1080/21663831.2017.1364675},
journal = {Materials Research Letters},
number = 8,
volume = 5,
place = {United States},
year = {2017},
month = {8}
}