Engineering transformation pathways in an Al0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination

S. Dasari; A. Jagetia; V. Soni; B. Gwalani; S. Gorsse; R. Banerjee

doi:10.1080/21663831.2020.1777215

Engineering transformation pathways in an Al_0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination

S. Dasari
, A. Jagetia
, V. Soni
, B. Gwalani
, S. Gorsse
, R. Banerjee

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

21 Scopus citations

Abstract

Guided by thermodynamic modeling, engineering phase transformation pathways via thermo-mechanical processing, in a complex concentrated alloy/high entropy alloy (HEA) of composition Al_0.3CoFeNi, lead to a novel multi-scale microstructure consisting of fine-scale FCC + L1₂ grains mixed with B2 + BCC grains. The two-step pathway comprises initial decomposition of the parent single-phase FCC to form a fine-grained FCC + B2 microstructure, which further decomposes in the second step into the complex four-phase mixture, exhibiting an excellent combination of tensile yield stress of ∼1490 MPa, ultimate tensile strength of ∼1663 MPa, with a good ductility of ∼12% at room temperature.

Original language	English
Pages (from-to)	399-407
Number of pages	9
Journal	Materials Research Letters
Volume	8
Issue number	11
Early online date	Nov 1 2020
DOIs	https://doi.org/10.1080/21663831.2020.1777215
State	Published - Nov 1 2020
Externally published	Yes

Keywords

complex concentrated alloys
High entropy alloys
mechanical properties
multi-phase microstructure
multicomponent intermetallic precipitation

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10.1080/21663831.2020.1777215

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title = "Engineering transformation pathways in an Al0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination",

abstract = "Guided by thermodynamic modeling, engineering phase transformation pathways via thermo-mechanical processing, in a complex concentrated alloy/high entropy alloy (HEA) of composition Al0.3CoFeNi, lead to a novel multi-scale microstructure consisting of fine-scale FCC + L12 grains mixed with B2 + BCC grains. The two-step pathway comprises initial decomposition of the parent single-phase FCC to form a fine-grained FCC + B2 microstructure, which further decomposes in the second step into the complex four-phase mixture, exhibiting an excellent combination of tensile yield stress of ∼1490 MPa, ultimate tensile strength of ∼1663 MPa, with a good ductility of ∼12\% at room temperature.",

keywords = "complex concentrated alloys, High entropy alloys, mechanical properties, multi-phase microstructure, multicomponent intermetallic precipitation",

author = "S. Dasari and A. Jagetia and V. Soni and B. Gwalani and S. Gorsse and R. Banerjee",

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year = "2020",

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doi = "10.1080/21663831.2020.1777215",

language = "English",

volume = "8",

pages = "399--407",

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T1 - Engineering transformation pathways in an Al0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination

AU - Dasari, S.

AU - Jagetia, A.

AU - Soni, V.

AU - Gwalani, B.

AU - Gorsse, S.

AU - Banerjee, R.

PY - 2020/11/1

Y1 - 2020/11/1

N2 - Guided by thermodynamic modeling, engineering phase transformation pathways via thermo-mechanical processing, in a complex concentrated alloy/high entropy alloy (HEA) of composition Al0.3CoFeNi, lead to a novel multi-scale microstructure consisting of fine-scale FCC + L12 grains mixed with B2 + BCC grains. The two-step pathway comprises initial decomposition of the parent single-phase FCC to form a fine-grained FCC + B2 microstructure, which further decomposes in the second step into the complex four-phase mixture, exhibiting an excellent combination of tensile yield stress of ∼1490 MPa, ultimate tensile strength of ∼1663 MPa, with a good ductility of ∼12% at room temperature.

AB - Guided by thermodynamic modeling, engineering phase transformation pathways via thermo-mechanical processing, in a complex concentrated alloy/high entropy alloy (HEA) of composition Al0.3CoFeNi, lead to a novel multi-scale microstructure consisting of fine-scale FCC + L12 grains mixed with B2 + BCC grains. The two-step pathway comprises initial decomposition of the parent single-phase FCC to form a fine-grained FCC + B2 microstructure, which further decomposes in the second step into the complex four-phase mixture, exhibiting an excellent combination of tensile yield stress of ∼1490 MPa, ultimate tensile strength of ∼1663 MPa, with a good ductility of ∼12% at room temperature.

KW - complex concentrated alloys

KW - High entropy alloys

KW - mechanical properties

KW - multi-phase microstructure

KW - multicomponent intermetallic precipitation

UR - https://www.scopus.com/pages/publications/85087633541

U2 - 10.1080/21663831.2020.1777215

DO - 10.1080/21663831.2020.1777215

M3 - Article

AN - SCOPUS:85087633541

SN - 2166-3831

VL - 8

SP - 399

EP - 407

JO - Materials Research Letters

JF - Materials Research Letters

IS - 11

ER -

Engineering transformation pathways in an Al_0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination

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Keywords

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