Change in the primary solidification phase from fcc to bcc-based B2 in high entropy or complex concentrated alloys

D. Choudhuri; B. Gwalani; S. Gorsse; C. V. Mikler; R. V. Ramanujan; M. A. Gibson; R. Banerjee

doi:10.1016/j.scriptamat.2016.09.023

Change in the primary solidification phase from fcc to bcc-based B2 in high entropy or complex concentrated alloys

D. Choudhuri, B. Gwalani, S. Gorsse, C. V. Mikler, R. V. Ramanujan, M. A. Gibson, R. Banerjee^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

101 Citations (Scopus)

Abstract

An examination of a compositionally graded Al_xCuCrFeNi₂ high entropy alloy (HEA) or complex concentrated alloy (CCA), revealed that marginally increasing Al content from x = 0.8 to x = 1.0 (+ 6 at.%) changes the primary solidification phase from a simple disordered-fcc to a bcc-based ordered-B2 phase. Subsequently, a second solidification product forms, a disordered-bcc in case of x = 0.8 and a disordered-fcc in case of x = 1.0. Solid-state decomposition within these phases results in fcc + L1₂ and bcc + B2 products, accompanied by compositional partitioning. These results provide new insights into the influence of Al on the primary solidification product, and have been rationalized using a computational thermodynamic approach.

Original language	English
Pages (from-to)	186-190
Number of pages	5
Journal	Scripta Materialia
Volume	127
DOIs	https://doi.org/10.1016/j.scriptamat.2016.09.023
Publication status	Published - Jan 15 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 Acta Materialia Inc.

ASJC Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Keywords

Complex concentrated alloys
High entropy alloys
Lens
Microscopy
Thermodynamic modeling

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10.1016/j.scriptamat.2016.09.023

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title = "Change in the primary solidification phase from fcc to bcc-based B2 in high entropy or complex concentrated alloys",

abstract = "An examination of a compositionally graded AlxCuCrFeNi2 high entropy alloy (HEA) or complex concentrated alloy (CCA), revealed that marginally increasing Al content from x = 0.8 to x = 1.0 (+ 6 at.%) changes the primary solidification phase from a simple disordered-fcc to a bcc-based ordered-B2 phase. Subsequently, a second solidification product forms, a disordered-bcc in case of x = 0.8 and a disordered-fcc in case of x = 1.0. Solid-state decomposition within these phases results in fcc + L12 and bcc + B2 products, accompanied by compositional partitioning. These results provide new insights into the influence of Al on the primary solidification product, and have been rationalized using a computational thermodynamic approach.",

keywords = "Complex concentrated alloys, High entropy alloys, Lens, Microscopy, Thermodynamic modeling",

author = "D. Choudhuri and B. Gwalani and S. Gorsse and Mikler, {C. V.} and Ramanujan, {R. V.} and Gibson, {M. A.} and R. Banerjee",

note = "Publisher Copyright: {\textcopyright} 2016 Acta Materialia Inc.",

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doi = "10.1016/j.scriptamat.2016.09.023",

language = "English",

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AU - Choudhuri, D.

AU - Gwalani, B.

AU - Gorsse, S.

AU - Mikler, C. V.

AU - Ramanujan, R. V.

AU - Gibson, M. A.

AU - Banerjee, R.

PY - 2017/1/15

Y1 - 2017/1/15

N2 - An examination of a compositionally graded AlxCuCrFeNi2 high entropy alloy (HEA) or complex concentrated alloy (CCA), revealed that marginally increasing Al content from x = 0.8 to x = 1.0 (+ 6 at.%) changes the primary solidification phase from a simple disordered-fcc to a bcc-based ordered-B2 phase. Subsequently, a second solidification product forms, a disordered-bcc in case of x = 0.8 and a disordered-fcc in case of x = 1.0. Solid-state decomposition within these phases results in fcc + L12 and bcc + B2 products, accompanied by compositional partitioning. These results provide new insights into the influence of Al on the primary solidification product, and have been rationalized using a computational thermodynamic approach.

AB - An examination of a compositionally graded AlxCuCrFeNi2 high entropy alloy (HEA) or complex concentrated alloy (CCA), revealed that marginally increasing Al content from x = 0.8 to x = 1.0 (+ 6 at.%) changes the primary solidification phase from a simple disordered-fcc to a bcc-based ordered-B2 phase. Subsequently, a second solidification product forms, a disordered-bcc in case of x = 0.8 and a disordered-fcc in case of x = 1.0. Solid-state decomposition within these phases results in fcc + L12 and bcc + B2 products, accompanied by compositional partitioning. These results provide new insights into the influence of Al on the primary solidification product, and have been rationalized using a computational thermodynamic approach.

KW - Complex concentrated alloys

KW - High entropy alloys

KW - Lens

KW - Microscopy

KW - Thermodynamic modeling

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JO - Scripta Materialia

JF - Scripta Materialia

ER -

Change in the primary solidification phase from fcc to bcc-based B2 in high entropy or complex concentrated alloys

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

Access to Document

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