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

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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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. © 2012 Elsevier B.V.

Original language	English
Pages (from-to)	22-27
Journal	Materials Science and Engineering A
Volume	541
DOIs	https://doi.org/10.1016/j.msea.2012.01.103
Publication status	Published - 15 Apr 2012

Research Keywords

Ductility
Ferritic steels
NiAl
Precipitation

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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. {\textcopyright} 2012 Elsevier B.V.",

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.}",

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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.

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. © 2012 Elsevier B.V.

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. © 2012 Elsevier B.V.

KW - Ductility

KW - Ferritic steels

KW - NiAl

KW - Precipitation

UR - http://www.scopus.com/inward/record.url?scp=84862814423&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84862814423&origin=recordpage

U2 - 10.1016/j.msea.2012.01.103

DO - 10.1016/j.msea.2012.01.103

M3 - RGC 21 - Publication in refereed journal

SN - 0921-5093

VL - 541

SP - 22

EP - 27

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

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

Abstract

Research Keywords

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