skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy

Abstract

Coherent B2-ordered NiAl-type precipitates have been used to reinforce solid-solution bodycentered- cubic iron for high-temperature application in fossil-energy power plants. In this study, the stability of nano-sized precipitates in a NiAl-strengthened ferritic alloy was investigated at 700 - 950°C using ultra-small angle X-ray scattering and electron microscopies. Here we show that the coarsening kinetics of NiAl-type precipitates is in excellent agreement with the ripening model in multicomponent alloys. We further demonstrate that the interfacial energy between the matrix and NiAl-type precipitates is strongly dependent to differences in the matrix/precipitate compositions. The results profile the ripening process in multicomponent alloys by illustrating controlling factors (i.e., interfacial energy, diffusivities, and element partitioning). As a result, the study provides guidelines to design and develop high-temperature alloys with stable microstructures for long-term service.

Authors:
 [1];  [1];  [2];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
  3. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1245024
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Sun, Zhiqian, Song, Gian, Ilavsky, Jan, Ghosh, Gautam, and Liaw, Peter K. Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy. United States: N. p., 2015. Web. doi:10.1038/srep16081.
Sun, Zhiqian, Song, Gian, Ilavsky, Jan, Ghosh, Gautam, & Liaw, Peter K. Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy. United States. doi:10.1038/srep16081.
Sun, Zhiqian, Song, Gian, Ilavsky, Jan, Ghosh, Gautam, and Liaw, Peter K. Thu . "Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy". United States. doi:10.1038/srep16081. https://www.osti.gov/servlets/purl/1245024.
@article{osti_1245024,
title = {Nano-sized precipitate stability and its controlling factors in a NiAl-strengthened ferritic alloy},
author = {Sun, Zhiqian and Song, Gian and Ilavsky, Jan and Ghosh, Gautam and Liaw, Peter K.},
abstractNote = {Coherent B2-ordered NiAl-type precipitates have been used to reinforce solid-solution bodycentered- cubic iron for high-temperature application in fossil-energy power plants. In this study, the stability of nano-sized precipitates in a NiAl-strengthened ferritic alloy was investigated at 700 - 950°C using ultra-small angle X-ray scattering and electron microscopies. Here we show that the coarsening kinetics of NiAl-type precipitates is in excellent agreement with the ripening model in multicomponent alloys. We further demonstrate that the interfacial energy between the matrix and NiAl-type precipitates is strongly dependent to differences in the matrix/precipitate compositions. The results profile the ripening process in multicomponent alloys by illustrating controlling factors (i.e., interfacial energy, diffusivities, and element partitioning). As a result, the study provides guidelines to design and develop high-temperature alloys with stable microstructures for long-term service.},
doi = {10.1038/srep16081},
journal = {Scientific Reports},
number = 1,
volume = 5,
place = {United States},
year = {2015},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

Save / Share: