Enthalpy and heat capacity of titanium based alloys

Bros, H.; Michel, M. L.; Castanet, R.

doi:10.1007/bf02547007

Cited by 15 publications

(10 citation statements)

References 1 publication

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“…However, a comparison with available limited literature reveals that the present C P estimates are in reasonable accord with the reported values for typical ␣/␤ titanium alloys [14][15][16]. Since Ti-4Nb-4Zr is a solid solution alloy, a crude estimate of its C P may be attempted by taking the mole fraction weighted average of individual elemental C P .…”

Section: Thermal Property Tabulationsupporting

confidence: 85%

“…Since Ti-4Nb-4Zr is a solid solution alloy, a crude estimate of its C P may be attempted by taking the mole fraction weighted average of individual elemental C P . That is, C P (TiNbZr) ≈ x Ti C P,Ti + x Nb C P,Nb + x Zr C P,Zr (14) where x Ti , etc. refer to the mole fraction of titanium and C P,Ti is its corresponding molar heat capacity.…”

Section: Thermal Property Tabulationmentioning

confidence: 98%

“…It may be said that notwithstanding the extensive literature on structure-property correlation in titanium-based alloys, the availability of assessed thermophysical property information is restricted only to a few systems [14][15][16] and practically none exists for the alpha alloys of Ti-Nb-Zr ternary. However, a comparison with available limited literature reveals that the present C P estimates are in reasonable accord with the reported values for typical ␣/␤ titanium alloys [14][15][16].…”

Section: Thermal Property Tabulationmentioning

confidence: 98%

See 2 more Smart Citations

Thermal property characterization of a Ti–4wt.%Nb–4wt.%Zr alloy using drop and differential scanning calorimetry

Anbarasan

Ganesh

Raju

et al. 2008

Journal of Alloys and Compounds

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Section: Thermal Property Tabulationsupporting

confidence: 85%

Section: Thermal Property Tabulationmentioning

confidence: 98%

Section: Thermal Property Tabulationmentioning

confidence: 98%

See 1 more Smart Citation

Thermal property characterization of a Ti–4wt.%Nb–4wt.%Zr alloy using drop and differential scanning calorimetry

Anbarasan

Ganesh

Raju

et al. 2008

Journal of Alloys and Compounds

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“…4, the specific heat C P at 298.15 K is estimated to be 519 J · kg −1 · K −1 . This value is in the same range as the ones reported for other related Ti-based alloys [18].…”

Section: Analytical Representation Of Enthalpy Increment Datasupporting

confidence: 82%

A Study on Thermal Properties and α(hcp) → β(bcc) Phase Transformation Energetics in Ti–5 mass% Ta–1.8 mass% Nb Alloy Using Inverse Drop Calorimetry

et al. 2010

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Accurate measurements of enthalpy increment (H T − H 298. 15 ) values have been made on a Ti-5 mass% Ta-1.8 mass% Nb alloy using the inverse drop calorimetry technique in the temperature range from 463 K to 1457 K. The measured enthalpy increment values show a steady increase with temperature in both α-hcp and β-bcc solid solution regions. It is found that both the onset as well the completion of the α → β phase change are demonstrated by a marked deviation of the enthalpy increment behavior from the otherwise smooth variation encountered in the respective low-temperature α-and high-temperature β-phase domains. The transformation start (T s ) and finish (T f ) temperatures of the α → β phase change are found to be (1072 ± 10) K and (1156 ± 10) K, respectively. In the actual α → β phase transformation region, the variation of the enthalpy with the progress of transformation is found to follow a sigmoidal shape which is in line with the diffusive nature of the phase transformation. An estimation of the total enthalpy change associated with the α → β phase transformation ( • H tr ) has been made by assuming a simple diffusion limited kinetic model for the phase change. The net enthalpy change for the α → β transformation is found to be 76 J · g −1 . The measured temperature variation of the enthalpy increment in both α-and β-phase regimes are fitted to simple analytical functional forms to obtain temperature-dependent estimates of the specific heat, C P . The total specific heat change associated with the α → β phase transformation • C α P →β is estimated to be 904 J · kg −1 · K −1 .

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“…Bros et al [112] measured the heat content of various TieAleX alloys, amongst which an alloy with 9.5 at. % Al and 2.1 at.…”

Section: Thermochemical Atomistic and Diffusion Datamentioning

confidence: 99%

Assessment of the Al–Fe–Ti system

2006

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The Al-Fe-Ti system has been assessed and the limiting binary systems are shortly reviewed.Based on a thorough review of the literature, isotherms at 800, 900, and 1000 °C have been re-evaluated and a provisional isotherm at 1200 °C is presented for the first time. The effect of alloying the binary phases with the third component is reviewed with regard to the ternary homogeneity ranges, crystallography, order/disorder transformations, and site occupancies. Of the variously reported ternary compounds only the existence of "Al 2 FeTi" (τ 2 ) and "Al 8 FeTi 3 " (τ 3 ) is confirmed. The occurrence of the phases τ 2 * , τ′ 2 , and of a new stacking variant of TiAl is still under discussion, while the existence of the phases Fe 2 AlTi (τ 1 ) and Fe 25 Al 69 Ti 6 (X) is ruled out. The presented reaction scheme corroborates the isothermal sections and also a representation of the liquidus surface is given. Magnetic, electrical, thermochemical, atomistic and diffusion data for Al-Fe-Ti alloys are summarised and an overview about studies on modelling of phase equilibria and phase transformations is given.

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Enthalpy and heat capacity of titanium based alloys

Cited by 15 publications

References 1 publication

Thermal property characterization of a Ti–4wt.%Nb–4wt.%Zr alloy using drop and differential scanning calorimetry

Thermal property characterization of a Ti–4wt.%Nb–4wt.%Zr alloy using drop and differential scanning calorimetry

A Study on Thermal Properties and α(hcp) → β(bcc) Phase Transformation Energetics in Ti–5 mass% Ta–1.8 mass% Nb Alloy Using Inverse Drop Calorimetry

Assessment of the Al–Fe–Ti system

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