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Title: Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range

Abstract

Knowledge of the phase stability in the Al-Co-Fe ternary system is critical for developing Al-Fe-Si-based low-cost lightweight high-temperature materials and is thus experimentally investigated over the whole composition range. Three complete isothermal sections at 1000, 900 and 800 °C were constructed based on the results measured from three identical Co/Fe/Al5Fe2 diffusion triples and forty-three equilibrated alloys using data from scanning electron microscopy (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD). At all the three temperatures, a continuous solution, Al13(Co,Fe)4, was confirmed between the Al13Fe4 and M-Al13Co4 phases. Phase boundaries of the γ, α, β, Al2Fe, Al5Fe2, Al5Co2, Al9Co2 and Al13(Co,Fe)4 phases and the corresponding phase equilibrium relations were clearly defined from the obtained tie-lines and phase boundary data. Three three-phase regions were confirmed in the 1000 °C isothermal section, while four three-phase regions were confirmed in the 900 and 800 °C isothermal sections. The large amount of new phase equilibrium data proposed in this work will serve as reliable input for future thermodynamic assessments of the Al-Co-Fe system within the CALPHAD (CALculation of PHAse Diagrams) framework to improve the current Al thermodynamic databases.

Authors:
; ; ; ORCiD logo
Publication Date:
Research Org.:
Univ. of Florida, Gainesville, FL (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1560879
Alternate Identifier(s):
OSTI ID: 1593303; OSTI ID: 1593310
Grant/Contract Number:  
EE0007742
Resource Type:
Published Article
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Name: Journal of Alloys and Compounds Journal Volume: 815 Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
36 MATERIALS SCIENCE; Al-Co-Fe system; Phase diagram; Diffusion triple; Equilibrated alloy; CALPHAD

Citation Formats

Zhu, Lilong, Soto-Medina, Sujeily, Hennig, Richard G., and Manuel, Michele V. Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range. Netherlands: N. p., 2020. Web. doi:10.1016/j.jallcom.2019.152110.
Zhu, Lilong, Soto-Medina, Sujeily, Hennig, Richard G., & Manuel, Michele V. Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range. Netherlands. https://doi.org/10.1016/j.jallcom.2019.152110
Zhu, Lilong, Soto-Medina, Sujeily, Hennig, Richard G., and Manuel, Michele V. Wed . "Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range". Netherlands. https://doi.org/10.1016/j.jallcom.2019.152110.
@article{osti_1560879,
title = {Experimental investigation of the Al–Co–Fe phase diagram over the whole composition range},
author = {Zhu, Lilong and Soto-Medina, Sujeily and Hennig, Richard G. and Manuel, Michele V.},
abstractNote = {Knowledge of the phase stability in the Al-Co-Fe ternary system is critical for developing Al-Fe-Si-based low-cost lightweight high-temperature materials and is thus experimentally investigated over the whole composition range. Three complete isothermal sections at 1000, 900 and 800 °C were constructed based on the results measured from three identical Co/Fe/Al5Fe2 diffusion triples and forty-three equilibrated alloys using data from scanning electron microscopy (SEM), electron probe microanalysis (EPMA) and X-ray diffraction (XRD). At all the three temperatures, a continuous solution, Al13(Co,Fe)4, was confirmed between the Al13Fe4 and M-Al13Co4 phases. Phase boundaries of the γ, α, β, Al2Fe, Al5Fe2, Al5Co2, Al9Co2 and Al13(Co,Fe)4 phases and the corresponding phase equilibrium relations were clearly defined from the obtained tie-lines and phase boundary data. Three three-phase regions were confirmed in the 1000 °C isothermal section, while four three-phase regions were confirmed in the 900 and 800 °C isothermal sections. The large amount of new phase equilibrium data proposed in this work will serve as reliable input for future thermodynamic assessments of the Al-Co-Fe system within the CALPHAD (CALculation of PHAse Diagrams) framework to improve the current Al thermodynamic databases.},
doi = {10.1016/j.jallcom.2019.152110},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 815,
place = {Netherlands},
year = {2020},
month = {1}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1016/j.jallcom.2019.152110

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Works referenced in this record:

Assessment of the Al Corner of the Ternary Al–Fe–Si System
journal, May 2010


Design, Processing, Microstructure, Properties, and Applications of Advanced Intermetallic TiAl Alloys
journal, November 2012


Iron intermetallic phases in the Al corner of the Al-Si-Fe system
journal, March 2003

  • Khalifa, W.; Samuel, F. H.; Gruzleski, J. E.
  • Metallurgical and Materials Transactions A, Vol. 34, Issue 13
  • DOI: 10.1007/s11661-003-1009-9

The Al-Rich Part of the Fe-Al Phase Diagram
journal, January 2016

  • Li, Xiaolin; Scherf, Anke; Heilmaier, Martin
  • Journal of Phase Equilibria and Diffusion, Vol. 37, Issue 2
  • DOI: 10.1007/s11669-015-0446-7

An assessment of the entire Al–Fe system including D03 ordering
journal, June 2009


Experimental investigation and thermodynamic assessment of the Al-Co-Ni system
journal, June 2018


Evolution of Complex Phases in Al-Fe-Si Systems
journal, November 2015


The phase separations of Fe-Al-Co ordering alloys
journal, February 1987


Thermodynamic assessment of the Al-Fe-Si system
journal, April 1999


Synthesis, properties and applications of titanium aluminides
journal, October 1992

  • Froes, F. H.; Suryanarayana, C.; Eliezer, D.
  • Journal of Materials Science, Vol. 27, Issue 19
  • DOI: 10.1007/BF02403806

Phase equilibria in the system Al–Co–Si
journal, August 2005


On the Phase Diagrams of the Al-Fe and Al-Fe-Si Systems
journal, January 1987


Al-Co-Si (Aluminum-Cobalt-Silicon)
journal, November 2007


Phase equilibria and structural investigations in the system Al–Fe–Si
journal, December 2011


Al-Co-Si (Aluminum-Cobalt-Silicon)
journal, June 2012


Al-Fe-Si (Aluminum-Iron-Silicon)
journal, July 2012


On the constitution of the Al–Co–Fe alloy system
journal, February 2010


A thermodynamic database for Ni-base superalloys
journal, June 2001


Understanding phase stability of Al-Co-Cr-Fe-Ni high entropy alloys
journal, November 2016


Phase equilibria in the Fe–Co binary system
journal, January 2002


Update of Al-Fe-Si, Al-Mn-Si and Al-Fe-Mn-Si thermodynamic descriptions
journal, July 2014


On the elemental effect of AlCoCrCuFeNi high-entropy alloy system
journal, January 2007


Intermetallic compound formation in Fe–Al–Si ternary system: Part II
journal, November 2002


Critical evaluation and thermodynamic modeling of the Al-Co-Fe system
journal, July 2019


The Al–Co–Si phase diagram
journal, March 2011


On the Reaction Scheme and Liquidus Surface in the Ternary System Al-Fe-Si
journal, July 2007

  • Krendelsberger, Nataliya; Weitzer, Franz; Schuster, Julius C.
  • Metallurgical and Materials Transactions A, Vol. 38, Issue 8
  • DOI: 10.1007/s11661-007-9182-x

Intermetallic compound formation in Fe–Al–Si ternary system: Part I
journal, November 2002


Exploration and Development of High Entropy Alloys for Structural Applications
journal, January 2014

  • Miracle, Daniel; Miller, Jonathan; Senkov, Oleg
  • Entropy, Vol. 16, Issue 1
  • DOI: 10.3390/e16010494

Phases, microstructure and mechanical properties of AlxCoCrFeNi high-entropy alloys at elevated temperatures
journal, March 2014


Phase separation of BCC phase in the Co-rich portion of Co-Fe-Al system
journal, April 2004


Thermal conductivity mapping of the Ni–Al system and the beta-NiAl phase in the Ni–Al–Cr system
journal, June 2012


Microstructure and mechanical property of as-cast, -homogenized, and -deformed AlxCoCrFeNi (0≤x≤2) high-entropy alloys
journal, November 2009


Phase decomposition and precipitation of metastable A2 phase in B2 ordered Co–Al–Fe alloys
journal, March 2006

  • Kozakai, Takao; Koyama, Toshiyuki; Doi, Minoru
  • Zeitschrift für Metallkunde, Vol. 97, Issue 3
  • DOI: 10.3139/146.101250

Solid-liquid phase equilibria in the Al-Fe-Si system at 727 °C
journal, November 2004

  • Pontevichi, S.; Bosselet, F.; Barbeau, F.
  • Journal of Phase Equilibria and Diffusion, Vol. 25, Issue 6
  • DOI: 10.1007/s11669-004-0066-0

Experimental reinvestigation of Al–Co phase diagram in vicinity of Al13Co4 family of phases
journal, October 2015


Equilibrium high entropy alloy phase stability from experiments and thermodynamic modeling
journal, March 2018


Stable and metastable quasicrystals in Al-based alloy systems with transition metals
journal, March 2004


Thermodynamic and diffusion kinetic studies of the Fe-Co system
journal, September 2017


Re-determination of transition temperatures in the Fe–Al system by differential thermal analysis
journal, July 2007

  • Stein, Frank; Palm, Martin
  • International Journal of Materials Research, Vol. 98, Issue 7
  • DOI: 10.3139/146.101512

Metastable Two-Phase Field(A2+B2) in Co-Al-Fe and Co-Al Alloy Systems
journal, March 2004