Two new steel and iron alloys databases are included in the 2020a release, the thermodynamic database TCFE10 and the mobility database MOBFE5.
TCFE10 receives several important updates:
MOBFE5 is updated to correspond to TCFE10:
Two new High Entropy Alloys databases are included in the 2020a release, the thermodynamic database TCHEA4 and the mobility database MOBHEA2.
TCHEA4 receives several important improvements:
MOBHEA2 is updated to correspond to TCHEA4:
The general alloy solutions database, SSOL7, receives several improvements:
This release includes updates to two nickel and one copper database.
The Scheil calculator now gives users the option to calculate back diffusion in the primary phase using diffusion data from a mobility database. It also takes into account the cooling rate and the secondary dendrite arm spacing. This new feature is available in the Graphical mode, Console mode and TC-Python.
A Scheil Solidification Simulation of the Aluminium Alloy AA7075 comparing a Classic Scheil Simulation (red line) with Scheil with Back Diffusion simulations (blue and green lines) and to experimental data.
It is now possible to make adiabatic calculations in the Process Metallurgy Module. An adiabatic calculation assumes no heat and mass exchange with the environment during the equilibrium reaction.
Adiabatic calculations are useful when adding cool material such as scrap or ferro-alloys to the system because it will typically result in lowering the global temperature. They’re also useful when adding reactive materials such as oxygen gas, which, for example, can result in a strong increase in the global temperature due to exothermal reactions. Typical exothermal reactions are the oxidation of Aluminium to Alumina or the oxidation of carbon to carbon monoxide gas.
When you set up an adiabatic calculation, you do not set a global temperature as condition but rather define the temperature for each material that is added, as shown in the image below. The global temperature is then the result of the equilibrium calculation.
A new example, PMET_03_Argon_Oxygen_Decarborization, is available which shows an adiabatic calculation for an AOD converter as a function of added gas amount and gas composition.
The updated Process Metallurgy Module showing the new settings available on the Process Metallurgy Calculator: Thermal control (adiabatic calculation), temperature setting for the material, and the normal cubic meter for the gas unit.
The Process Metallurgy Module is available for free to Thermo-Calc users who have the thermodynamic database TCOX9 or TCOX8 and who currently have a valid Maintenance and Support Subscription.
A new general model is added to the Property Model Calculator, the Yield Strength model.
This model considers four contributions to the overall yield stress of the material - intrinsic strength for the pure elements, grain boundary strength, solid solution strengthening and precipitation strengthening.
A user-set temperature is used for evaluating the equilibrium of the system and the resulting compositions and phase fractions are subsequently used in the evaluation of mechanical properties.
The Yield strength model is found under the General Models folder on the Property Model Calculator Configuration window. There are a variety of settings to define. Click the Description tab or search the help for more information.
Three new examples are included with Thermo-Calc 2020a which show various applications of the new Yield Strength model:
A new calculation type has been added to TC-Python called Batch Equilibrium. This calculation type is similar to single equilibrium calculations, but it offers significant performance improvements when calculating a lot of fast single equilibria, which are systems with few or non-complicated phases.
A new example, T_14_Batch Equilibria, is included to demonstrate this new calculation type.
A plot showing the results of the new example pyex_T_14_Batch_equilibria. This example shows you how to create a batch equilibrium calculation from a ternary system, loop it while changing Al and Cr concentration, then calculate the density and plot the result as a 3D surface.
TC-Python has received several other improvements and bug fixes, which are included in the release notes.
Viscosity of metallic liquid is added to two thermodynamic databases, TCFE10 and MOBHEA4. This is the first time the property viscosity is included in Thermo-Calc Software databases.
Viscosity can be plotted in Graphical mode, Console mode and in TC-Python. In graphical mode, the viscosity is plotted via the one-axis or grid calculators and then selected in the Plot configuration window as either Dynamic Viscosity or Kinematic Viscosity. In console mode, the viscosity can be plotted via a step calculation vs. temperature or composition.
Viscosity of metallic liquid can now be plotted in Graphical mode, Console mode and TC-Python when using the databases TCFE10 or TCHEA4.