Thermophysical Properties of Solid and Liquid Ti-6Al-4V (TA6V) Alloy

Abstract

Ti-6Al-4V (TA6V) titanium alloy is widely used in industrial applications such as aeronautic and aerospace due to its good mechanical properties at high temperatures. Experiments on two different resistive pulse heating devices (CEA Valduc and TU-Graz) have been carried out in order to study thermophysical properties (such as electrical resistivity, volume expansion, heat of fusion, heat capacity, normal spectral emissivity, thermal diffusivity, and thermal conductivity) of both solid and liquid Ti-6Al-4V. Fast timeresolved measurements of current, voltage, and surface radiation and shadowgraphs of the volume have been undertaken. At TU-Graz, a fast laser polarimeter has been used for determining the emissivity of liquid Ti-6Al-4V at 684.5 nm and a differential scanning calorimeter (DSC) for measuring the heat capacity of solid Ti-6Al-4V. This study deals with the specific behavior of the different solid phase transitions (effect of heating rate) and the melting region, and emphasizes the liquid state (T >2000 K).

Microstructures and Grain Refinement of Additive-Manufactured Ti-xW Alloys

“…The 2D finite element model implements the conservation of energy, momentum and mass equations. The thermophysical properties (temperature dependent) [31,32] and parameters used in the calculations are summarized in Table II. The liquid phase region (assumed to be laminar flow and a Newtonian fluid) includes the Buoyancy and Marangoni effects.…”

Peculiarities of Single Track Formation From Ti6al4v Alloy at Different Laser Power Densities by Selective Laser Melting

“…For the present study, all the properties of the material were temperature-dependent [11][12][13]. To validate the model, the actual experimental parameters were used as input for the simulation.…”

Understanding the effect of laser scan strategy on residual stress in selective laser melting through thermo-mechanical simulation

“…The values of emissivity used in equation (3) in this work were compiled using two sources, as shown in Table 1 [30,31].…”

“…Thermal conductivity values for the liquid state were taken from experiments performed by Bovineau et al [31]. The thermal conductivity values for all states are presented in Figure 4 and the supporting properties required for its calculation are listed in Table 2 and Table 3 Table 3 -Temperature dependent material properties used for solid Ti-6Al-4V.…”