Room temperature ductility of NiAl-strengthened ferritic steels: Effects of precipitate microstructure

Z. K. Teng; C. T. Liu; M. K. Miller; G. Ghosh; E. A. Kenik; S. Huang; P. K. Liaw

doi:10.1016/j.msea.2012.01.103

Room temperature ductility of NiAl-strengthened ferritic steels: Effects of precipitate microstructure

Z. K. Teng^*, C. T. Liu, M. K. Miller, G. Ghosh, E. A. Kenik, S. Huang, P. K. Liaw

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

The effects of precipitate microstructure on the room temperature ductility of a series of carefully designed Fe-Al-Ni-Cr-Mo steels were investigated. Transmission electron microscopy (TEM), ultra small angle X-ray scattering (USAXS), and atom probe tomography (APT) were conducted to quantify the nano-scaled precipitates. The accuracy of the characterization results was verified by a numerical analysis. Three point bending tests results demonstrated that ductility was a function of the precipitate volume fraction and the Al and Ni concentrations in the Fe matrix, these relationships were discussed in terms of possible mechanisms. The ductility was also found to be independent of the precipitate size and inter-particle spacing in the studied range, which was validated by a theoretical model.

Original language	English (US)
Pages (from-to)	22-27
Number of pages	6
Journal	Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	541
DOIs	https://doi.org/10.1016/j.msea.2012.01.103
State	Published - Apr 15 2012

Keywords

Ductility
Ferritic steels
NiAl
Precipitation

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.msea.2012.01.103

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title = "Room temperature ductility of NiAl-strengthened ferritic steels: Effects of precipitate microstructure",

abstract = "The effects of precipitate microstructure on the room temperature ductility of a series of carefully designed Fe-Al-Ni-Cr-Mo steels were investigated. Transmission electron microscopy (TEM), ultra small angle X-ray scattering (USAXS), and atom probe tomography (APT) were conducted to quantify the nano-scaled precipitates. The accuracy of the characterization results was verified by a numerical analysis. Three point bending tests results demonstrated that ductility was a function of the precipitate volume fraction and the Al and Ni concentrations in the Fe matrix, these relationships were discussed in terms of possible mechanisms. The ductility was also found to be independent of the precipitate size and inter-particle spacing in the studied range, which was validated by a theoretical model.",

keywords = "Ductility, Ferritic steels, NiAl, Precipitation",

author = "Teng, {Z. K.} and Liu, {C. T.} and Miller, {M. K.} and G. Ghosh and Kenik, {E. A.} and S. Huang and Liaw, {P. K.}",

note = "Funding Information: This research is mainly supported by the Department of Energy (DOE) , Office of Fossil Energy Program , under Grant No. DE-FG26-06NT42732 , with Mr. Vito Cedro and Dr. Patricia Rawls as the program managers. The authors would like to thank Dr. M.E. Fine from Northwestern University, Dr. E. George, Dr. H. B. Bei, Ms. K. F. Russell, and Mr. C. Carmichael from ORNL for the experimental support and discussions. Research at the Oak Ridge National Laboratory SHaRE User Facility was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy. ",

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doi = "10.1016/j.msea.2012.01.103",

language = "English (US)",

volume = "541",

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T1 - Room temperature ductility of NiAl-strengthened ferritic steels

T2 - Effects of precipitate microstructure

AU - Teng, Z. K.

AU - Liu, C. T.

AU - Miller, M. K.

AU - Ghosh, G.

AU - Kenik, E. A.

AU - Huang, S.

AU - Liaw, P. K.

N1 - Funding Information: This research is mainly supported by the Department of Energy (DOE) , Office of Fossil Energy Program , under Grant No. DE-FG26-06NT42732 , with Mr. Vito Cedro and Dr. Patricia Rawls as the program managers. The authors would like to thank Dr. M.E. Fine from Northwestern University, Dr. E. George, Dr. H. B. Bei, Ms. K. F. Russell, and Mr. C. Carmichael from ORNL for the experimental support and discussions. Research at the Oak Ridge National Laboratory SHaRE User Facility was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy.

PY - 2012/4/15

Y1 - 2012/4/15

N2 - The effects of precipitate microstructure on the room temperature ductility of a series of carefully designed Fe-Al-Ni-Cr-Mo steels were investigated. Transmission electron microscopy (TEM), ultra small angle X-ray scattering (USAXS), and atom probe tomography (APT) were conducted to quantify the nano-scaled precipitates. The accuracy of the characterization results was verified by a numerical analysis. Three point bending tests results demonstrated that ductility was a function of the precipitate volume fraction and the Al and Ni concentrations in the Fe matrix, these relationships were discussed in terms of possible mechanisms. The ductility was also found to be independent of the precipitate size and inter-particle spacing in the studied range, which was validated by a theoretical model.

AB - The effects of precipitate microstructure on the room temperature ductility of a series of carefully designed Fe-Al-Ni-Cr-Mo steels were investigated. Transmission electron microscopy (TEM), ultra small angle X-ray scattering (USAXS), and atom probe tomography (APT) were conducted to quantify the nano-scaled precipitates. The accuracy of the characterization results was verified by a numerical analysis. Three point bending tests results demonstrated that ductility was a function of the precipitate volume fraction and the Al and Ni concentrations in the Fe matrix, these relationships were discussed in terms of possible mechanisms. The ductility was also found to be independent of the precipitate size and inter-particle spacing in the studied range, which was validated by a theoretical model.

KW - Ductility

KW - Ferritic steels

KW - NiAl

KW - Precipitation

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Room temperature ductility of NiAl-strengthened ferritic steels: Effects of precipitate microstructure

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Keywords

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