Thermophysical Property Database

The thermophysical property database PanTiAl2025_TP is compatible with the PanTiAl2025_TH thermodynamic database and suitable for the simulation of thermophysical properties of TiAl-based alloys. It includes the molar volume data for all the phases, surface tension and viscosity properties for the liquid phase.

Molar Volume

The current molar volume database covers all 208 phases assessed in the PanTiAl2025_TH database. It is used to calculate the density, thermal expansion, solidification shrinkage of the alloys.

The simulated density changes vs. temperature of a series of TiAl-based alloys are shown below to validate the current database.

Figure 1: Density of Ti-Al binary alloys at 25 °C [1992ASM]

Figure 2: Density of TiAl4822+Mn sintered at 1150 °C [2020Ann]

Surface Tension

The surface tension of the liquid phase is added into the property database. Figure 3 shows the surface tension of the TiAl4822 (Ti-34.44Al-2.6Cr-4.7Nb, wt.%) alloy.

Figure 3: Surface tension of the TiAl4822 alloy

Viscosity

The viscosity of the liquid phase is added into the property database. Figure 4 shows the viscosity of the TiAl4822 alloy.

Figure 4: Viscosity of the TiAl4822 alloy

[1992ASM] ASM Handbook. Volume 3, Alloy Phase Diagrams. Materials Park, OH :ASM International, 1992.

[2020Ann] Annamalai, A.R.; Srikanth, M.; Varshney, R.; Ashokkumar, M.Y.; Patro, S.K.; Jen, C.-P. Microstructure Evolution and Mechanical Properties of Spark Plasma Sintered Manganese Addition on Ti-48Al-2Cr-2Nb Alloys. Metals, 10 (2020): 1577.