Microstructure simulation


Access uses computer-aided methods to investigate microstructure development in metallic materials along the manufacturing and processing chain. The simulation models provide quantitative correlations between process and microstructure as well as microstructure and properties. ACCESS develops and distributes the MICRESS and HOMAT software packages for this purpose.

In addition to a wide variety of casting processes (including sand casting, gravity die casting, die casting or directional solidification for the production of single crystals), Access deals with the joining processes of welding and soldering, as well as microstructural development, in particular solid phase transformations in the course of heat treatment steps. The transfer and extension of simulation models for the description of solidified joints in additive manufacturing is another new and exciting field of work. For the thermodynamic material description of multi-component alloys, Access uses the CALPHAD approach as well as programs and databases from Thermo-Calc Software.

Current developments are aimed at a consistent digital description of material structures across process boundaries, as well as linking different simulation models on different scales. One example is the linking of process models on a component scale with a local microstructure description for the material. The data exchange and interaction of different simulation calculations can be realized, for example , via the open simulation platform AIXVIPMAP.

Access works on the topics listed above as part of publicly funded basic research, application-oriented joint research or in direct cooperation with our customers.

Software

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MICRESS (MICRostructure Evolution Simulation Software) is the central software for the spatially and time-resolved simulation of microstructure evolution in metallic materials. MICRESS has been developed at Access for more than 20 years and has been used under license by academic and industrial users worldwide since 2004. A unique feature is the runtime coupling to thermodynamic databases via the so-called TQ interface of ThermoCalc.

More recent software developments include the HOMAT program package for calculating the effective properties of complex multiphase microstructures or composite materials, for example.

We support the linking of different software tools in the sense of ICME (Integrated Computational Materials Engineering) for a consistent, simulative mapping of complete process chains by developing the free simulation platform AIXVIPMAP.

MICRESS can be used to simulate and thus quantitatively investigate a large number of processes on the microstructure scale. These include

  • cellular and dendritic solidification morphologies
  • directional and equiaxial solidification
  • Eutectic and peritectic solidification
  • Germination processes
  • Solid state phase transformations incl. mechanical stresses
  • Maturing processes during heat treatment

Examples of use

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