Evolution of phase stability and structural properties in CrFeNiTiV high-entropy alloy under high-temperature heat treatment conditions

Nagarjuna, Cheenepalli; Dewangan, Sheetal Kumar; Lee, Hansung; Ahn, Byungmin

doi:10.1016/j.msea.2023.145680

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…Table 3 provides a comprehensive overview of stability criteria (Ω, Λ, ϕ Ye , and

) for the two studied alloys and a wide range of other alloys produced via mechanical alloying, drawn from various sources in the literature [ 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 ]. The table shows the reported microstructure in the as-milled state as well as in the annealed state.…”

Section: Discussionmentioning

confidence: 99%

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Santiago-Andrades,

Vidal-Crespo,

Blázquez

et al. 2023

Nanomaterials

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Various stability criteria developed for high-entropy alloys are applied to compositions produced by mechanical alloying. While they agree with the annealed samples, these criteria fail to describe the as-milled metastable systems, highlighting the ability of mechanical alloying to overcome the limitations imposed by these criteria. The criteria are based on atomic size (Ω ≥ 1.1 and δr ≤ 6.6%) and/or electronegativity misfit, as well as on mixing enthalpy (Λ>0.95 J mol−1K−1 and −5 kJ mol−1<∆Hmix<0), or purely thermodynamic (ϕYe>20; ϕKing>1; Teff<500 K). These criteria are applied to several compositions found in the literature and to two metastable fcc solid solutions produced by mechanical alloying with compositions Al0.75CoXFeNi with X = Cr and Mn. Single-phase microstructures are stable up to above 600 K, leading to more stable multiphase systems after annealing above this temperature. Mössbauer spectrometry shows that, whereas the alloy with Cr is paramagnetic in the as-milled and annealed state, the alloy with Mn changes from paramagnetic to ferromagnetic behavior (Curie temperature ~700 K) after annealing. Thermomagnetic experiments on annealed samples show for both compositions some hysteretic events at high temperatures (850 to 1000 K), probably ascribed to reversible ordering phenomena.

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“…Table 3 provides a comprehensive overview of stability criteria (Ω, Λ, ϕ Ye , and

Section: Discussionmentioning

confidence: 99%

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Santiago-Andrades,

Vidal-Crespo,

Blázquez

et al. 2023

Nanomaterials

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Effect of Si alloying on the structural, thermal expansion, and magnetic properties of FeCoNiAlSix high-entropy alloys

Nagarjuna,

Dewangan,

Lee

et al. 2024

J Mater Sci

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From phase decomposition to evaporation: A multi-modal evaluation of thermally degraded model lightweight high-entropy alloy

Alam,

Adaan-Nyiak,

Hwang

et al. 2024

Materials Characterization

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Evolution of phase stability and structural properties in CrFeNiTiV high-entropy alloy under high-temperature heat treatment conditions

Cited by 5 publications

References 37 publications

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Mechanical Alloying as a Way to Produce Metastable Single-Phase High-Entropy Alloys beyond the Stability Criteria

Effect of Si alloying on the structural, thermal expansion, and magnetic properties of FeCoNiAlSix high-entropy alloys

From phase decomposition to evaporation: A multi-modal evaluation of thermally degraded model lightweight high-entropy alloy

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