| Abstract Scope |
Thermophysical properties are essential components in multi-physics models for any manufacturing process. This presentation is about the assessment of the thermophysical properties of commercial materials used in welding and additive manufacturing. The material families studied are steel, stainless steel, aluminum, copper, cast iron, Ni-Fe-based superalloy, and titanium. The properties assessed are thermal conductivity, density, and specific heat capacity (and enthalpy) between room temperature and the melting range. The properties are assessed by estimating the deviations between independent sources including measurements, empirical equations, and computational predictions. The results show deviations up to 15% in thermal conductivity, 7% in specific heat capacity, and 2% in density. A methodology to estimate effective values of thermal conductivity, volumetric specific heat, and thermal diffusivity, accounting for their variation with temperature in the context of welding and additive manufacturing is presented. The calculated effective properties between room temperature to the relevant critical temperatures are tabulated. In summary, this work provides reliable ready-to-use numbers for properties to be used in multi-physics models in welding and additive manufacturing. |