Entropy-driven melting point depression in fcc HEAs

Kirk, Tanner; Vela, Brent; Mehalic, Seth; Youseff, Khaled; Arróyave, Raymundo

doi:10.1016/j.scriptamat.2021.114336

Entropy-driven melting point depression in fcc HEAs

Journal Article · Sat Oct 16 00:00:00 EDT 2021 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2021.114336· OSTI ID:1826928

^[1]; ^[2]; ^[2]; ^[3]; ^[2]

Texas A & M Univ., College Station, TX (United States); Texas A&M University
Texas A & M Univ., College Station, TX (United States)
Qatar Univ., Doha (Qatar)

High Entropy Alloys (HEAs) are an increasingly dominant alloy design paradigm. The premise of entropic stabilization of single-phase alloys has motivated much of the research on HEAs. Chemical complexity may indeed help stabilize single alloy phases relative to other lower-entropy competing solid phases. Paradoxically, this complexity may de-stabilize these alloys against the liquid phase, potentially limiting the application space of HEAs at elevated temperatures. In this work, we carry out a comprehensive investigation of the phase stability in the fcc CoCrFeMnNiV-Al HEA space using a state of the art CALPHAD database. By using modern visualization techniques and statistical analysis we examine the trade-off between chemical complexity and stability against the liquid state and identify a potentially difficult to overcome barrier for development of high temperature alloys, at least within the conventional fcc HEA space. Here, limited experimental data seem to be consistent with this analysis.

View Accepted Manuscript (DOE)

Research Organization:: Texas A&M Univ., College Station, TX (United States); Texas A&M University, College Station, TX (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AR0001427

OSTI ID:: 1826928

Alternate ID(s):: OSTI ID: 1826409
OSTI ID: 2202741

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Vol. 208; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

References (17)

TCHEA1: A Thermodynamic Database Not Limited for “High Entropy” Alloys Mao, Huahai; Chen, Hai-Lin; Chen, Qing Journal of Phase Equilibria and Diffusion, Vol. 38, Issue 4 https://doi.org/10.1007/s11669-017-0570-7	journal	July 2017
Fracture Toughness and Fatigue Crack Growth Behavior of As-Cast High-Entropy Alloys Seifi, Mohsen; Li, Dongyue; Yong, Zhang JOM, Vol. 67, Issue 10 https://doi.org/10.1007/s11837-015-1563-9	journal	August 2015
Fatigue behavior of Al0.5CoCrCuFeNi high entropy alloys Hemphill, M. A.; Yuan, T.; Wang, G. Y. Acta Materialia, Vol. 60, Issue 16 https://doi.org/10.1016/j.actamat.2012.06.046	journal	September 2012
Effect of aluminum on the microstructure and properties of two refractory high-entropy alloys Senkov, O. N.; Senkova, S. V.; Woodward, C. Acta Materialia, Vol. 68 https://doi.org/10.1016/j.actamat.2014.01.029	journal	April 2014
Fatigue behavior of a wrought Al0.5CoCrCuFeNi two-phase high-entropy alloy Tang, Zhi; Yuan, Tao; Tsai, Che-Wei Acta Materialia, Vol. 99 https://doi.org/10.1016/j.actamat.2015.07.004	journal	October 2015
A precipitation-hardened high-entropy alloy with outstanding tensile properties He, J. Y.; Wang, H.; Huang, H. L. Acta Materialia, Vol. 102 https://doi.org/10.1016/j.actamat.2015.08.076	journal	January 2016
A critical review of high entropy alloys and related concepts Miracle, D. B.; Senkov, O. N. Acta Materialia, Vol. 122 https://doi.org/10.1016/j.actamat.2016.08.081	journal	January 2017
Probing the entropy hypothesis in highly concentrated alloys Schön, Cláudio Geraldo; Duong, Thien; Wang, Yuhao Acta Materialia, Vol. 148 https://doi.org/10.1016/j.actamat.2018.01.028	journal	April 2018
High entropy alloys: A focused review of mechanical properties and deformation mechanisms George, E. P.; Curtin, W. A.; Tasan, C. C. Acta Materialia, Vol. 188 https://doi.org/10.1016/j.actamat.2019.12.015	journal	April 2020
In situ study of non-equilibrium solidification of CoCrFeNi high-entropy alloy and CrFeNi and CoCrNi ternary suballoys Andreoli, Angelo F.; Shuleshova, Olga; Witusiewicz, Victor T. Acta Materialia, Vol. 212 https://doi.org/10.1016/j.actamat.2021.116880	journal	June 2021
Effect of Co on the phase stability of CrMnFeCoxNi high entropy alloys following long-duration exposures at intermediate temperatures Bloomfield, M. E.; Christofidou, K. A.; Jones, N. G. Intermetallics, Vol. 114 https://doi.org/10.1016/j.intermet.2019.106582	journal	November 2019
Interdiffusion in Cr–Fe–Co–Ni medium-entropy alloys Durand, A.; Peng, L.; Laplanche, G. Intermetallics, Vol. 122 https://doi.org/10.1016/j.intermet.2020.106789	journal	July 2020
The influence of Fe variations on the phase stability of CrMnFexCoNi alloys following long-duration exposures at intermediate temperatures Bloomfield, M. E.; Christofidou, K. A.; Monni, F. Intermetallics, Vol. 131 https://doi.org/10.1016/j.intermet.2021.107108	journal	April 2021
On the prediction and the formation of the sigma phase in CrMnCoFeNix high entropy alloys Christofidou, K. A.; McAuliffe, T. P.; Mignanelli, P. M. Journal of Alloys and Compounds, Vol. 770 https://doi.org/10.1016/j.jallcom.2018.08.032	journal	January 2019
Metastable high-entropy dual-phase alloys overcome the strength–ductility trade-off Li, Zhiming; Pradeep, Konda Gokuldoss; Deng, Yun Nature, Vol. 534, Issue 7606 https://doi.org/10.1038/nature17981	journal	May 2016
Unavoidable disorder and entropy in multi-component systems Toher, Cormac; Oses, Corey; Hicks, David npj Computational Materials, Vol. 5, Issue 1 https://doi.org/10.1038/s41524-019-0206-z	journal	July 2019
Role of Static Displacements in Stabilizing Body Centered Cubic High Entropy Alloys Samolyuk, G. D.; Osetsky, Y. N.; Stocks, G. M. Physical Review Letters, Vol. 126, Issue 2 https://doi.org/10.1103/PhysRevLett.126.025501	journal	January 2021

Similar Records

The CALPHAD approach for HEAs: Challenges and opportunities

Journal Article · Mon Mar 14 20:00:00 EDT 2022 · MRS Bulletin · OSTI ID:1869106

Related Subjects

36 MATERIALS SCIENCE
Alloy design
High entropy alloys
High temperature applications
Melting

Entropy-driven melting point depression in fcc HEAs

Citation Formats

References (17)

Similar Records

Related Subjects