Trans-interface-diffusion-controlled coarsening of γ′ particles in Ni–Al alloys: commentaries and analyses of recent data

Ardell, A.J.

doi:10.1007/s10853-020-05036-0

Cited by 14 publications

(2 citation statements)

References 80 publications

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“…As follows from Table , criterion (eq ) is obeyed for the Ni 3 Al/Ni–Al system. Eqs and provide a new design rule for ISCNCs, − GP-zones, − or superalloys. − …”

Section: Resultsmentioning

confidence: 99%

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Interfacial Energy of Strained Coherent Interfaces and a New Design Rule To Select Phase Combinations for In Situ Coherent Nanocomposites

Kaptay

2023

Langmuir

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Nanocomposites show the best performance when their reinforcing phase precipitates in situ from a matrix upon heat treatment and when coherency between the matrix and the reinforcing phase is preserved even upon coarsening the precipitated particles. In this paper, first a new equation is derived for the interfacial energy of strained coherent interfaces. From here, a new design rule is derived in a form of a new dimensionless number to select phase combinations for in situ coherent nanocomposites (ISCNCs). This is calculated from the molar volume mismatch between the two phases, their elastic constants, and the modeled interfacial energy between them. When this dimensionless number is smaller than a critical value, ISCNCs are formed. The critical value of this dimensionless number is found here using experimental data for the Ni−Al/Ni 3 Al superalloy. The validity of the new design rule was confirmed on the Al−Li/Al 3 Li system. An algorithm is suggested to apply the new design rule. Our new design rule can be simplified to more easily available initial parameters: if the matrix and the precipitate have the same cubic crystal structure the precipitate is expected to form ISCNCs with that matrix if their standard molar volumes differ less than by about 2%.

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“…As follows from Table , criterion (eq ) is obeyed for the Ni 3 Al/Ni–Al system. Eqs and provide a new design rule for ISCNCs, − GP-zones, − or superalloys. − …”

Section: Resultsmentioning

confidence: 99%

“…In situ coherent nanocomposites (ISCNCs), − GP-zones, − and superalloys − are important classes of multiphase solid materials. Coherency between the phases in these materials is their most important feature ensuring their outstanding properties.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Energy of Strained Coherent Interfaces and a New Design Rule To Select Phase Combinations for In Situ Coherent Nanocomposites

Kaptay

2023

Langmuir

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Regression based computer vision analysis of volume-fraction effect on Pb–Sn solid–liquid coarsening in microgravity

Prabakar

Amos

2023

Appl. Phys. A

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Temperature Dependence of the γ/γ′ Interfacial Energy in Binary Ni–Al Alloys

Ardell

2021

Metall Mater Trans A

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Published data on the coarsening kinetics of γ′ (Ni3Al) precipitates in binary Ni–Al alloys aged at 12 temperatures ranging from 773 K to 1073 K are analyzed to provide a comprehensive evaluation of the temperature dependence of the γ/γ′ interfacial free energy, σ. The data are analyzed using equations of the trans-interface-diffusion-controlled (TIDC) theory of coarsening, with temporal exponent n = 2.4. The results show that σ decreases with increasing temperature, T. A linear empirical equation is fitted to the data on σvsT; it extrapolates to σ = 0 in the liquid region of the Ni–Al phase diagram, as it should do. A quantitative temperature-dependent transition radius, rtrans, is calculated; it depends on the product of the interface width and the ratio of the chemical diffusion coefficients in the γ phase and interface regions. Applying the TIDC coarsening equations to calculate σ is justified when the average radius, 〈r〉, satisfies the condition 〈r〉 < rtrans, which is valid for all the data used in the fit. The data on σvsT are compared with theoretical predictions. The results are discussed in the context of previous work, as well as with values of σ obtained through analyses using the equations of traditional LSW coarsening kinetics, n = 3.

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Trans-interface-diffusion-controlled coarsening of γ′ particles in Ni–Al alloys: commentaries and analyses of recent data

Cited by 14 publications

References 80 publications

Interfacial Energy of Strained Coherent Interfaces and a New Design Rule To Select Phase Combinations for In Situ Coherent Nanocomposites

Interfacial Energy of Strained Coherent Interfaces and a New Design Rule To Select Phase Combinations for In Situ Coherent Nanocomposites

Regression based computer vision analysis of volume-fraction effect on Pb–Sn solid–liquid coarsening in microgravity

Temperature Dependence of the γ/γ′ Interfacial Energy in Binary Ni–Al Alloys

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