DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Atom probe tomography study of Fe-Ni-Al-Cr-Ti ferritic steels with hierarchically-structured precipitates

Abstract

The ferritic Fe-Ni-Al-Cr-Mo steel (FBB8) has good creep properties up to 700 °C due to B2-NiAl nanoscale precipitates and its creep resistance can be further improved by additions of 2 or 4 wt.% Ti, as a result of sub-precipitates within the main precipitates. We report the hierarchical structure of the precipitates is studied in the light of phase separation via transmission electron microscopy (TEM) and atom probe tomography (APT). For FBB8-2Ti (with 2% Ti added) exhibiting B2-NiAl precipitates with L21-Ni2AlTi sub-precipitates, APT analysis shows strong partitioning of Ni, Al and Ti from the ferritic matrix into the B2/L21 precipitates and, within the precipitates, partitioning of Ti and Fe within the L21 sub-precipitates. Based on the published pseudo-binary phase-diagram between (Ni,Fe)Al and (Ni,Fe)Ti, this hierarchical precipitate microstructure is discussed based on the known miscibility gap between the B2 and L21 phases, due to partitioning of Ti into the L21 phase and ordering of Al and Ti on the Al sub-lattice of the B2 structure. For FBB8-4Ti (with 4% Ti added), by contrast, the L21 precipitates exhibit bcc sub-precipitates rich in Fe and Cr, with a composition close to that of the matrix; the absence of the B2 structure is consistent withmore » an increase of Ti and Fe concentrations, to 18.2 and 19.3 at.% respectively, as measured via APT, in the L21 precipitates.« less

Authors:
ORCiD logo [1];  [1];  [1]
  1. Northwestern University, Evanston, IL (United States)
Publication Date:
Research Org.:
Univ. of Tennessee, Knoxville, TN (United States); Northwestern Univ., Evanston, IL (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE); National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR); USDOE Office of Fossil Energy and Carbon Management (FECM)
OSTI Identifier:
1537899
Alternate Identifier(s):
OSTI ID: 1549093
Grant/Contract Number:  
FE0005868; DMR-0420532; N00014–0400798; N00014–0610539; N00014–0910781; N00014-1712870; DMR-1720139; ECCS-1542205
Resource Type:
Accepted Manuscript
Journal Name:
Acta Materialia
Additional Journal Information:
Journal Volume: 144; Journal Issue: C; Journal ID: ISSN 1359-6454
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ferritic steel; precipitate strengthening; hierarchical precipitate structure; B2-L21 phase separation; transmission electron microscopy; TEM; atom-probe tomography; APT

Citation Formats

Baik, Sung-Il, Rawlings, Michael J.S., and Dunand, David C. Atom probe tomography study of Fe-Ni-Al-Cr-Ti ferritic steels with hierarchically-structured precipitates. United States: N. p., 2017. Web. doi:10.1016/j.actamat.2017.11.013.
Baik, Sung-Il, Rawlings, Michael J.S., & Dunand, David C. Atom probe tomography study of Fe-Ni-Al-Cr-Ti ferritic steels with hierarchically-structured precipitates. United States. https://doi.org/10.1016/j.actamat.2017.11.013
Baik, Sung-Il, Rawlings, Michael J.S., and Dunand, David C. Mon . "Atom probe tomography study of Fe-Ni-Al-Cr-Ti ferritic steels with hierarchically-structured precipitates". United States. https://doi.org/10.1016/j.actamat.2017.11.013. https://www.osti.gov/servlets/purl/1537899.
@article{osti_1537899,
title = {Atom probe tomography study of Fe-Ni-Al-Cr-Ti ferritic steels with hierarchically-structured precipitates},
author = {Baik, Sung-Il and Rawlings, Michael J.S. and Dunand, David C.},
abstractNote = {The ferritic Fe-Ni-Al-Cr-Mo steel (FBB8) has good creep properties up to 700 °C due to B2-NiAl nanoscale precipitates and its creep resistance can be further improved by additions of 2 or 4 wt.% Ti, as a result of sub-precipitates within the main precipitates. We report the hierarchical structure of the precipitates is studied in the light of phase separation via transmission electron microscopy (TEM) and atom probe tomography (APT). For FBB8-2Ti (with 2% Ti added) exhibiting B2-NiAl precipitates with L21-Ni2AlTi sub-precipitates, APT analysis shows strong partitioning of Ni, Al and Ti from the ferritic matrix into the B2/L21 precipitates and, within the precipitates, partitioning of Ti and Fe within the L21 sub-precipitates. Based on the published pseudo-binary phase-diagram between (Ni,Fe)Al and (Ni,Fe)Ti, this hierarchical precipitate microstructure is discussed based on the known miscibility gap between the B2 and L21 phases, due to partitioning of Ti into the L21 phase and ordering of Al and Ti on the Al sub-lattice of the B2 structure. For FBB8-4Ti (with 4% Ti added), by contrast, the L21 precipitates exhibit bcc sub-precipitates rich in Fe and Cr, with a composition close to that of the matrix; the absence of the B2 structure is consistent with an increase of Ti and Fe concentrations, to 18.2 and 19.3 at.% respectively, as measured via APT, in the L21 precipitates.},
doi = {10.1016/j.actamat.2017.11.013},
journal = {Acta Materialia},
number = C,
volume = 144,
place = {United States},
year = {Mon Nov 13 00:00:00 EST 2017},
month = {Mon Nov 13 00:00:00 EST 2017}
}

Journal Article:

Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Advances in Physical Metallurgy and Processing of Steels. Design of Ferritic Creep-resistant Steels.
journal, January 2001


Elevated temperature ferritic and martensitic steels and their application to future nuclear reactors
journal, October 2005


Phase instabilities during high temperature exposure of 316 austenitic stainless steel
journal, April 1972

  • Weiss, B.; Stickler, R.
  • Metallurgical and Materials Transactions B, Vol. 3, Issue 4
  • DOI: 10.1007/BF02647659

Creep-strengthening of steel at high temperatures using nano-sized carbonitride dispersions
journal, July 2003

  • Taneike, Masaki; Abe, Fujio; Sawada, Kota
  • Nature, Vol. 424, Issue 6946
  • DOI: 10.1038/nature01740

Splitting phenomenon in the precipitation evolution in an Fe–Ni–Al–Ti–Cr stainless steel
journal, February 2010


Dynamic strain ageing in creep of β-nial
journal, September 1973


Creep behavior of a β′(NiAl) precipitation strengthened ferritic Fe–Cr–Ni–Al alloy
journal, May 1998


Ferritic Fe–Al–Ni–Cr alloys with coherent precipitates for high-temperature applications
journal, December 2004


Effect of titanium additions upon microstructure and properties of precipitation-strengthened Fe-Ni-Al-Cr ferritic alloys
journal, April 2017


Ordering and phase separation in b.c.c. aluminides of the Ni–Fe–Al–Ti system
journal, December 1997


Ultrastrong steel via minimal lattice misfit and high-density nanoprecipitation
journal, April 2017


Creep properties and microstructure of a precipitation-strengthened ferritic Fe–Al–Ni–Cr alloy
journal, June 2014


Creep behavior as dislocation climb over NiAl nanoprecipitates in ferritic alloy: The effects of interface stresses and temperature
journal, June 2015


Creep behavior of the heusler type structure alloy Ni2AlTi
journal, December 1976

  • Strutt, P. R.; Polvani, R. S.; Ingram, J. C.
  • Metallurgical Transactions A, Vol. 7, Issue 1
  • DOI: 10.1007/BF02644035

Microstructural characteristics of a Ni2TiAl-precipitate-strengthened ferritic alloy
journal, February 2017


Enthalpies of formation and lattice parameters of B2 phases in Al-Ni-X systems
journal, January 2007

  • Hu, Rongxiang; Su, Hsin-Ning; Nash, Philip
  • Pure and Applied Chemistry, Vol. 79, Issue 10
  • DOI: 10.1351/pac200779101653

The Heusler Phase Ti25(Fe50 − x Ni x )Al25 (0 ≤ x ≤ 50); Structure and Constitution
journal, October 2008

  • Yan, Xinlin; Grytsiv, A.; Rogl, P.
  • Journal of Phase Equilibria and Diffusion, Vol. 29, Issue 6
  • DOI: 10.1007/s11669-008-9389-6

Ordering and phase separation in the b.c.c. phase of the Fe–Al–Ti system
journal, March 1998


Effects of Al on the microstructure and ductility of NiAl-strengthened ferritic steels at room temperature
journal, August 2010


Fe-Ni-Al phase diagram in ALNI type permanent magnets related area
journal, September 1978


Phase equilibria in the Ni-Al-Ti system at 1173 k
journal, March 1985

  • Nash, P.; Liang, W. W.
  • Metallurgical Transactions A, Vol. 16, Issue 3
  • DOI: 10.1007/BF02814329

Early stages of decomposition within the γ′ phase of a Ni–Al–Ti model alloy
journal, March 2012


Optimal precipitate shapes in nickel-base γ–γ′ alloys
journal, February 2012


Mapping the evolution of hierarchical microstructures in a Ni-based superalloy
journal, December 2013

  • Vogel, Florian; Wanderka, Nelia; Balogh, Zoltan
  • Nature Communications, Vol. 4, Issue 1
  • DOI: 10.1038/ncomms3955

Three-Dimensional Atom-Probe Tomography: Advances and Applications
journal, August 2007


Atom probe tomography
journal, March 2007

  • Kelly, Thomas F.; Miller, Michael K.
  • Review of Scientific Instruments, Vol. 78, Issue 3
  • DOI: 10.1063/1.2709758

Dependence of interfacial excess on the threshold value of the isoconcentration surface
journal, May 2004

  • Yoon, Kevin E.; Noebe, Ronald D.; Hellman, Olof C.
  • Surface and Interface Analysis, Vol. 36, Issue 5-6
  • DOI: 10.1002/sia.1708

Partition coefficients and their uses
journal, December 1971

  • Leo, Albert; Hansch, Corwin; Elkins, David
  • Chemical Reviews, Vol. 71, Issue 6
  • DOI: 10.1021/cr60274a001

Phase stability of the X2AlTi (X: Fe, Co, Ni and Cu) Heusler and B2-type intermetallic compounds
journal, May 2002


Towards better 3-D reconstructions by combining electron tomography and atom-probe tomography
journal, November 2008


Hardware and Techniques for Cross- Correlative TEM and Atom Probe Analysis
journal, July 2008


Advanced volume reconstruction and data mining methods in atom probe tomography
journal, January 2016

  • Vurpillot, F.; Lefebvre, W.; Cairney, J. M.
  • MRS Bulletin, Vol. 41, Issue 1
  • DOI: 10.1557/mrs.2015.312

Coarsening and morphology of β′ particles in Fe-Ni-Al-Mo ferritic alloys
journal, May 1988

  • Calderon, H. A.; Fine, M. E.; Weertman, J. R.
  • Metallurgical Transactions A, Vol. 19, Issue 5
  • DOI: 10.1007/BF02662573

Characterization of nanoscale NiAl-type precipitates in a ferritic steel by electron microscopy and atom probe tomography
journal, July 2010


Role of alloying elements in phase decomposition in alnico magnet alloys
journal, February 1985

  • Hao, Shi Ming; Ishida, K.; Nishizawa, T.
  • Metallurgical Transactions A, Vol. 16, Issue 2
  • DOI: 10.1007/BF02816044

On the formation of hierarchically structured L2 1 -Ni2TiAl type precipitates in a ferritic alloy
journal, November 2012


Rapid solidification and ordering of B2 and L21 phases in the NiAlNiTi system
journal, February 1988


TEM study of β′ precipitation in NiAl–Ti alloys
journal, September 2000


Physical and mechanical properties of the B2 compound NiAl
journal, January 1993

  • Noebe, R. D.; Bowman, R. R.; Nathal, M. V.
  • International Materials Reviews, Vol. 38, Issue 4
  • DOI: 10.1179/imr.1993.38.4.193