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

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Article reports a novel multi-phase microstructure in a HEA/CCA similar to the microstructure observed in dual-phase stainless steel.

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9 p.

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Dasari, S.; Jagetia, Abhinav; Soni, V.; Gwalani, Bharat; Banerjee, Rajarshi & Gorsse, Stéphane July 2, 2020.

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Article reports a novel multi-phase microstructure in a HEA/CCA similar to the microstructure observed in dual-phase stainless steel.

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9 p.

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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.

This paper reports a novel multi-phase microstructure in a HEA/CCA similar to the microstructure observed in dual-phase stainless steel. This report exemplifies the novelty of HEA/CCA compositional space.

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  • Materials Research Letters, 8(11), Taylor & Francis, July 2, 2020, pp. 1-9

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  • Publication Title: Materials Research Letters
  • Volume: 8
  • Issue: 11
  • Page Start: 399
  • Page End: 407
  • Peer Reviewed: Yes

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  • July 2, 2020

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  • May 27, 2022, 5:50 a.m.

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  • Dec. 12, 2023, 1:12 p.m.

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Dasari, S.; Jagetia, Abhinav; Soni, V.; Gwalani, Bharat; Banerjee, Rajarshi & Gorsse, Stéphane. Engineering transformation pathways in an Al0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination, article, July 2, 2020; (https://digital.library.unt.edu/ark:/67531/metadc1934072/: accessed June 7, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT College of Engineering.

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