Understanding the melting temperature in Ni-base alloys is critical for casting, welding and additive processes. However, the melting temperature of an alloy can be sensitive to its actual chemistry. Handbooks and material data sheets typically only specify a nominal value for the melting range. Thermo-Calc can be used to explore the entire chemistry specification range and its effect on the liquidus and solidus temperatures.
This figure shows the variation in solidus temperature calculated for 1000 compositions that fall within the alloy 718 specification range. Similar diagrams can be calculated for other properties, such as γ′ solvus temperature or volume fraction of eutectic.