Thermodynamic assessment of the Cu-Ti-Zr system. III. Cu-Ti-Zr system

Турчанин, М. А.; Velikanova, Т. Ya.; Agraval, P. G.; Abdulov, A. R.; Dreval, Liya

doi:10.1007/s11106-008-9062-y

Cited by 21 publications

(3 citation statements)

References 25 publications

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“…In such approach, concentration range of amorphization is bounded by T0 L/ϕ lines, defined as the locus of points that correspond to the equality of the Gibbs energy of the liquid phase and the corresponding solid solutions at glass transition temperature Tg. The validity of this approach was confirmed through comparison of the results of calculation for a number of binary [5,[10][11][12] and ternary [5,7,13] systems of transition metals with known concentration ranges of amorphization. To carry out such calculations, the models describing temperature-composition dependence of the thermodynamic properties of solution phases (liquid or solid) should work successfully in equilibrium conditions and should be extrapolated to the supercooling temperature range.…”

Section: Calculation Procedures and Thermodynamic Databasementioning

confidence: 88%

“…In present work this database is extended for the sixcomponent glass-forming Cu-Fe-Ni-Ti-Zr-Hf system. This extension required that information on the thermodynamic properties of phases in the binary Cu-Fe [2], Fe-Ni [3], Fe-(Ti,Zr,Hf) [4,5] and ternary Cu-Fe-Ni [3], Cu-Fe-(Ti,Zr,Hf) [5,6], Cu-Ti-Hf [7], Fe-Ni-(Ti,Zr,Hf) [8], Fe-Ti-Zr [9], Fe-Ti-Hf systems be taken into account in the database.…”

Section: Introductionmentioning

confidence: 99%

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Application of CALPHAD Method for Predicting of Concentration Range of Amorphization of Transition Metals Melts

Agraval,

Turchanin,

Dreval

et al. 2024

DDF

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Early, the efficiency of the CALPHAD (Calculation of Phase Diagrams) method to a targeted search for compositions of amorphous alloys has been shown. The method for predicting the ranges of amorphization is based on the calculation of diagrams of metastable phase transformations between supercooled melts and boundary solid solutions on the base of pure elements. In this work, the model parameters for thermodynamic properties of liquid alloys and boundary solid solutions were summarized in a self-consistent database for the multicomponent Cu–Fe–Ni–Ti–Zr–Hf system. Such database for the multicomponent system is based on a common set of model parameters for boundary binary and ternary systems. This database was used to predict the concentration ranges of amorphization for the quinary Cu–Fe–Ni–Ti–Zr, Cu–Fe–Ni–Ti–Hf and boundary ternary and quaternary systems. The results of calculations are presented along sections in quaternary and quinary systems. The ternary and quaternary equiatomic alloys along with high entropy CuFeNiTiZr and CuFeNiTiHf alloys are trapped into prognosed composition ranges of amorphization. Predicted composition space of amorphization for melts of the Fe–Ni–Ti–Zr system is shown on the concentration tetrahedron. Based on the obtained results, a new criterion for predicting the concentration regions of amorphization of multicomponent melts is proposed, according to which the presence of a sufficient content of metals that are electron acceptors and donors is a chemical factor that affects the thermodynamic stability of melts and determines their glass-forming ability. For multicomponent melts of the Cu–Fe–Ni–Ti–Zr–Hf system the concentration ranges of amorphization correspond to the simultaneous fulfillment of the conditions xFe + xNi + xCu > 0.25 and xTi + xZr + xHf > 0.15, where Fe, Ni, and Cu are electron acceptors and Ti, Zr, and Hf are electron donors.

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Section: Calculation Procedures and Thermodynamic Databasementioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Application of CALPHAD Method for Predicting of Concentration Range of Amorphization of Transition Metals Melts

Agraval,

Turchanin,

Dreval

et al. 2024

DDF

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“…Moreover, Zr was detected in all Ti-Cu intermetallic phases of the Ti6242-Ag28Cu joint. It has previously been shown that TiCu can incorporate Zr [21,22], while there exists a continuous solid solution (Ti,Zr)2Cu intermetallic also designated γ-phase [22]. Nevertheless, the highest amount of…”

Section: Brazing Reaction Productsmentioning

confidence: 99%

Interfacial Reactions and Fracture Behavior of Ti Alloy-Ag28Cu Brazing Joints: Influence of Titanium Alloy Composition

Gussone

Kasperovich

Haubrich

et al. 2018

Metals

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Brazing of titanium provides a joining technique suitable for the fabrication of highly-loaded aerospace components, but it still poses numerous challenges, such as the formation of brittle intermetallic interphases. This study of the interphase formation in brazed joints consisting of different titanium alloys (Ti-CP2, Ti-CP4, Ti-6Al-4V, Ti-6Al-2Mo-4Zr-2Sn) and Ag28Cu shows that complex reactions lead to the formation of various intermetallic phases including a Ti2Cu-TiCu boundary zone. The compositions of the titanium alloys influenced the particular microstructures, which have been characterized with various methods including synchrotron X-ray microtomography. Tensile tests evidence high ultimate tensile strengths that are, importantly, not directly limited by the strength of the brazing alloy. The strength of the Ti2Cu-TiCu phase boundary is significantly increased by the alloying elements in Ti-6Al-4V and Ti-6Al-2Mo-4Zr-2Sn and the crack paths change from boundary failure to transcrystalline fracture through TiCu as well as Ag-rich regions. Cu diffusion into the titanium substrate, leading to a coarse grained β-phase that transforms eutectoidally into a lamellar α-Ti + Ti2Cu structure during cooling, occurred in all systems except Ti-6Al-2Mo-4Zr-2Sn where Mo stabilized a fine grained microstructure and enabled the formation of a columnar TiCu structure.

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Phase Equilibria in the Cu–Ti–Zr System at 750°C. I. The Isothermal Section with Copper Content from 0 to 50 at.%

Storchak-Fedyuk

Artyukh

Duma

et al. 2017

Powder Metall Met Ceram

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Thermodynamic assessment of the Cu-Ti-Zr system. III. Cu-Ti-Zr system

Cited by 21 publications

References 25 publications

Application of CALPHAD Method for Predicting of Concentration Range of Amorphization of Transition Metals Melts

Application of CALPHAD Method for Predicting of Concentration Range of Amorphization of Transition Metals Melts

Interfacial Reactions and Fracture Behavior of Ti Alloy-Ag28Cu Brazing Joints: Influence of Titanium Alloy Composition

Phase Equilibria in the Cu–Ti–Zr System at 750°C. I. The Isothermal Section with Copper Content from 0 to 50 at.%

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