Calculation of Regular Solution Phase Diagrams for Titanium Base Binary Systems

Kaufman, Larry; Bernstein, Harold

doi:10.1016/b978-0-08-006564-9.50046-4

Cited by 89 publications

(116 citation statements)

References 1 publication

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“…According to Kaufman's results on the martensitic starting temperature (M s ) of Ti-Nb alloys, 23) M s is a function of Nb content, and it decreases with increase in Nb. The M s for 29 mass% and 39 mass%Nb is about 300 and 100…”

Section: Disscusionmentioning

confidence: 99%

Effect of Nb on Microstructural Characteristics of Ti-Nb-Ta-Zr Alloy for Biomedical Applications

Hao

Yang

et al. 2002

Mater. Trans.

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The effects of several commonly used heat treatment schemes on the microstructures of two Ti-Nb-Ta-Zr alloys aimed at biomedical applications were studied in this work using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The specimens were water quenched from 790 • C and then aged at temperatures between 300 • C and 600 • C. The experimental results showed that α and ω phase precipitated from the metastable β matrix in Ti-29Nb-13Ta-4.6Zr alloy during isothermal ageing. But for Ti-39Nb-13Ta-4.6Zr, the precipitation reaction was more sluggish than that in Ti-29Nb-13Ta-4.6Zr because of high amount of β stabilizing elements in the former alloy. As a result the α phase was unable to precipitate during short time ageing treatment. After longer time (12 days) ageing treatment at 500 • C or 400 • C, recognizable α precipitates were observed in the aged samples. It is concluded that Ti-29Nb-13Ta-4.6Zr can be heat treated to obtain different microstructures and is better than Ti-39Nb-13Ta-4.6Zr in terms of age hardenability.

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Section: Disscusionmentioning

confidence: 99%

Effect of Nb on Microstructural Characteristics of Ti-Nb-Ta-Zr Alloy for Biomedical Applications

Hao

Yang

et al. 2002

Mater. Trans.

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“…In the CALPHAD method, 40) the properties of a system in thermodynamic equilibrium are evaluated by modeling the dependence on temperature and composition of the Gibbs energy of the individual phases. The equilibrium states of the system are calculated via the minimization of its Gibbs free energy with appropriate software packages.…”

Section: Calphad Calculations On Steels and Thermodynamic Databases 3mentioning

confidence: 99%

Thermodynamic Modeling in Reduced Activation Steels

Danón

Servant

2005

ISIJ Int.

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Reduced Activation (RA) martensitic steels of the 9/11CrWVTa type are promising candidates for fusion reactor applications as long as they exhibit good mechanical properties-similar to those of commercial martensitic steels of the 9/12CrMo(NbV) type-and satisfy design criteria related to the behavior under irradiation. A contribution on thermodynamic modeling in RA steels is presented. The current status of the development of a thermodynamic database in the framework of the CALPHAD approach is reported. Thermodynamic calculations concerning RA alloys are discussed which can be helpful to interpret experimental observations on phase relationships, phase compositions, transition temperatures, etc.

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“…Also, the phase diagrams of these binary systems [19][20][21] were assessed using CALPHAD approach. 22) However, the thermodynamic properties of liquid phases determined experimentally do not accord with that obtained by phase diagram assessment, in general. This discrepancy arises because the thermodynamic properties of liquid phases were not considered properly during the phase diagram assessment.…”

Section: Introductionmentioning

confidence: 79%

Activity Measurement of the Constituents in Molten Sn-Mg-Zn Ternary Lead Free Solder Alloys by Mass Spectrometry

et al. 2002

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Activities of the constituents in an alloy proposed for the Pb-free solder, Sn-Mg-Zn, were studied experimentally using a mass spectrometer. The ion current ratios of Mg to Zn were measured in the temperature range 700-800 K. From the experimental results and the assessed thermodynamic properties of molten Sn-Mg, Sn-Zn, and Mg-Zn binary alloys, the excess Gibbs free energy of liquid Sn-Mg-Zn ternary alloy was determined. Also, phase diagram of Sn-Mg-Zn ternary system was determined.

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Calculation of Regular Solution Phase Diagrams for Titanium Base Binary Systems

Cited by 89 publications

References 1 publication

Effect of Nb on Microstructural Characteristics of Ti-Nb-Ta-Zr Alloy for Biomedical Applications

Effect of Nb on Microstructural Characteristics of Ti-Nb-Ta-Zr Alloy for Biomedical Applications

Thermodynamic Modeling in Reduced Activation Steels

Activity Measurement of the Constituents in Molten Sn-Mg-Zn Ternary Lead Free Solder Alloys by Mass Spectrometry

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