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Title: Design of Novel Precipitate-Strengthened Al-Co-Cr-Fe-Nb-Ni High-Entropy Superalloys

Abstract

Here, a series of non-equiatomic Al-Co-Cr-Fe-Nb-Ni high-entropy alloys, with varying levels of Co, Nb and Fe, were investigated in an effort to obtain microstructures similar to conventional Ni-based superalloys. Elevated levels of Co were observed to significantly decrease the solvus temperature of the γ' precipitates. Both Nb and Co in excessive concentrations promoted the formation of Laves and NiAl phases that formed either during solidification and remained undissolved during homogenization or upon high-temperature aging. Lowering the content of Nb, Co, or Fe prevented the formation of the eutectic type Laves. In addition, lowering the Co content resulted in a higher number density and volume fraction of the γ' precipitates, while increasing the Fe content led to the destabilization of the γ' precipitates. Various aging treatments were performed which led to different size distributions of the strengthening phase. Results from the microstructural characterization and hardness property assessments of these high-entropy alloys were compared to a commercial, high-strength Ni-based superalloy RR1000. Potentially, precipitation-strengthened high-entropy alloys could find applications replacing Ni-based superalloys as structural materials in power generation applications.

Authors:
ORCiD logo [1];  [2];  [1]
  1. Illinois Inst. of Technology, Chicago, IL (United States)
  2. National Energy Technology Lab. (NETL), Albany, OR (United States)
Publication Date:
Research Org.:
National Energy Technology Lab. (NETL), Albany, OR (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1468393
Resource Type:
Accepted Manuscript
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
Journal Volume: 49; Journal Issue: 1; Journal ID: ISSN 1073-5623
Publisher:
ASM International
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; High-entropy alloys; Alloy design; Phase stability; Microstructure; Aerospace structures

Citation Formats

Antonov, Stoichko, Detrois, Martin, and Tin, Sammy. Design of Novel Precipitate-Strengthened Al-Co-Cr-Fe-Nb-Ni High-Entropy Superalloys. United States: N. p., 2017. Web. doi:10.1007/s11661-017-4399-9.
Antonov, Stoichko, Detrois, Martin, & Tin, Sammy. Design of Novel Precipitate-Strengthened Al-Co-Cr-Fe-Nb-Ni High-Entropy Superalloys. United States. doi:10.1007/s11661-017-4399-9.
Antonov, Stoichko, Detrois, Martin, and Tin, Sammy. Thu . "Design of Novel Precipitate-Strengthened Al-Co-Cr-Fe-Nb-Ni High-Entropy Superalloys". United States. doi:10.1007/s11661-017-4399-9. https://www.osti.gov/servlets/purl/1468393.
@article{osti_1468393,
title = {Design of Novel Precipitate-Strengthened Al-Co-Cr-Fe-Nb-Ni High-Entropy Superalloys},
author = {Antonov, Stoichko and Detrois, Martin and Tin, Sammy},
abstractNote = {Here, a series of non-equiatomic Al-Co-Cr-Fe-Nb-Ni high-entropy alloys, with varying levels of Co, Nb and Fe, were investigated in an effort to obtain microstructures similar to conventional Ni-based superalloys. Elevated levels of Co were observed to significantly decrease the solvus temperature of the γ' precipitates. Both Nb and Co in excessive concentrations promoted the formation of Laves and NiAl phases that formed either during solidification and remained undissolved during homogenization or upon high-temperature aging. Lowering the content of Nb, Co, or Fe prevented the formation of the eutectic type Laves. In addition, lowering the Co content resulted in a higher number density and volume fraction of the γ' precipitates, while increasing the Fe content led to the destabilization of the γ' precipitates. Various aging treatments were performed which led to different size distributions of the strengthening phase. Results from the microstructural characterization and hardness property assessments of these high-entropy alloys were compared to a commercial, high-strength Ni-based superalloy RR1000. Potentially, precipitation-strengthened high-entropy alloys could find applications replacing Ni-based superalloys as structural materials in power generation applications.},
doi = {10.1007/s11661-017-4399-9},
journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
number = 1,
volume = 49,
place = {United States},
year = {2017},
month = {11}
}

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Works referenced in this record:

Manufacturing of High Entropy Alloys
journal, July 2015


Influence of Heat Treatment on the Distribution of Ni<SUB>2</SUB>Nb and Microsegregation in Cast Inconel 718 Alloy
journal, January 2005


Comparison of thermodynamic database models and APT data for strength modeling in high Nb content γ–γ′ Ni-base superalloys
journal, December 2015


Effect of Nb addition on the microstructure and properties of AlCoCrFeNi high-entropy alloy
journal, January 2012


High-Temperature Tensile Strength of Al10Co25Cr8Fe15Ni36Ti6 Compositionally Complex Alloy (High-Entropy Alloy)
journal, June 2015


Laves-phase superalloys?
journal, June 1992


Sluggish diffusion in Co–Cr–Fe–Mn–Ni high-entropy alloys
journal, August 2013


The constitution of niobium-cobalt alloys
journal, May 1967


Microstructure and Mechanical Behavior of High-Entropy Alloys
journal, August 2015

  • Licavoli, Joseph J.; Gao, Michael C.; Sears, John S.
  • Journal of Materials Engineering and Performance, Vol. 24, Issue 10
  • DOI: 10.1007/s11665-015-1679-7

Nanostructured High-Entropy Alloys with Multiple Principal Elements: Novel Alloy Design Concepts and Outcomes
journal, May 2004

  • Yeh, J.-W.; Chen, S.-K.; Lin, S.-J.
  • Advanced Engineering Materials, Vol. 6, Issue 5, p. 299-303
  • DOI: 10.1002/adem.200300567

GSAS-II : the genesis of a modern open-source all purpose crystallography software package
journal, March 2013


A critical review of high entropy alloys and related concepts
journal, January 2017


On the Solidification and Phase Stability of a Co-Cr-Fe-Ni-Ti High-Entropy Alloy
journal, November 2013

  • Yeh, An-Chou; Chang, Yao-Jen; Tsai, Che-Wei
  • Metallurgical and Materials Transactions A, Vol. 45, Issue 1
  • DOI: 10.1007/s11661-013-2097-9

Microstructures and properties of high-entropy alloys
journal, April 2014


Development of a Refractory High Entropy Superalloy
journal, March 2016

  • Senkov, Oleg; Isheim, Dieter; Seidman, David
  • Entropy, Vol. 18, Issue 3
  • DOI: 10.3390/e18030102

Fiji: an open-source platform for biological-image analysis
journal, June 2012

  • Schindelin, Johannes; Arganda-Carreras, Ignacio; Frise, Erwin
  • Nature Methods, Vol. 9, Issue 7
  • DOI: 10.1038/nmeth.2019

VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data
journal, October 2011


High-Entropy Alloys: A Critical Review
journal, April 2014


Phase stability in high entropy alloys: Formation of solid-solution phase or amorphous phase
journal, December 2011


Microstructure and Tensile Behavior of Al8Co17Cr17Cu8Fe17Ni33 (at.%) High-Entropy Alloy
journal, September 2013


Investigation of the phase stabilities in AlNiCoCrFe high entropy alloys
journal, January 2017


Recent progress in high-entropy alloys
journal, December 2006


On The Superior High Temperature Hardness of Precipitation Strengthened High Entropy Ni-Based Alloys : High Entropy Ni-Based Alloys
journal, September 2016

  • Tsao, Te-Kang; Yeh, An-Chou; Kuo, Chen-Ming
  • Advanced Engineering Materials, Vol. 19, Issue 1
  • DOI: 10.1002/adem.201600475

Calculations of Mixing Enthalpy and Mismatch Entropy for Ternary Amorphous Alloys
journal, January 2000


Fine-scale precipitation in the high-entropy alloy Al 0.5 CrFeCoNiCu
journal, October 2015


Phase evolution in an Al0.5CrFeCoNiCu High Entropy Alloy
journal, April 2016


Precipitation behavior and its effects on tensile properties of FeCoNiCr high-entropy alloys
journal, December 2016


Searching for Next Single-Phase High-Entropy Alloy Compositions
journal, October 2013


Microstructure and electrochemical properties of high entropy alloys—a comparison with type-304 stainless steel
journal, September 2005


An understanding of high entropy alloys from phase diagram calculations
journal, June 2014


Fatigue behavior of Al0.5CoCrCuFeNi high entropy alloys
journal, September 2012


Entropy-driven phase stability and slow diffusion kinetics in an Al0.5CoCrCuFeNi high entropy alloy
journal, December 2012


The role of alloying elements in the design of nickel-base superalloys
journal, October 1984

  • Jena, A. K.; Chaturvedi, M. C.
  • Journal of Materials Science, Vol. 19, Issue 10
  • DOI: 10.1007/BF00549796

Effect of valence electron concentration on stability of fcc or bcc phase in high entropy alloys
journal, May 2011

  • Guo, Sheng; Ng, Chun; Lu, Jian
  • Journal of Applied Physics, Vol. 109, Issue 10
  • DOI: 10.1063/1.3587228

Microstructure, thermophysical and electrical properties in AlxCoCrFeNi (0≤x≤2) high-entropy alloys
journal, July 2009

  • Chou, Hsuan-Ping; Chang, Yee-Shyi; Chen, Swe-Kai
  • Materials Science and Engineering: B, Vol. 163, Issue 3
  • DOI: 10.1016/j.mseb.2009.05.024

NIH Image to ImageJ: 25 years of image analysis
journal, June 2012

  • Schneider, Caroline A.; Rasband, Wayne S.; Eliceiri, Kevin W.
  • Nature Methods, Vol. 9, Issue 7
  • DOI: 10.1038/nmeth.2089

Precipitation in the equiatomic high-entropy alloy CrMnFeCoNi
journal, March 2016


Thermo-Calc & DICTRA, computational tools for materials science
journal, June 2002


    Works referencing / citing this record:

    Inter‐Dependency Relationships in High‐Entropy Alloys: Phase Stability Criteria
    journal, August 2019

    • Chauhan, Pranjal; Chopra, Swamini; Thangaraju, Shanmugasundaram
    • Advanced Engineering Materials, Vol. 21, Issue 9
    • DOI: 10.1002/adem.201900251

    Phase Constituent and Microhardness of As-Cast and Long-Time Annealed AlxCo2−xCrFeNi Multicomponent Alloys
    journal, October 2019

    • Sun, Ya; Wu, Changjun; Peng, Haoping
    • Journal of Phase Equilibria and Diffusion, Vol. 40, Issue 5
    • DOI: 10.1007/s11669-019-00761-9

    Metastability in high-entropy alloys: A review
    journal, September 2018

    • Wei, Shaolou; He, Feng; Tasan, Cemal Cem
    • Journal of Materials Research, Vol. 33, Issue 19
    • DOI: 10.1557/jmr.2018.306