thermomechanical material testing machine

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The main focus of the Institute for Material Applications in Mechanical Engineering (IWM) is the research of the relationships between the manufacturing process, the material microstructure and the macroscopically measurable manufacturing and usage properties of materials, material composites and components. A main focus of interest is powder based primary forming processes, in particular innovative processes of additive manufacturing technology, as well as the heat treatment of metallic materials. In terms of properties, the IWM is particularly concerned with material fatigue at ambient and high temperatures and with fracture mechanics. The IWM has built up special competence with the multi-scale, numerical simulation of processes and failure sequences. It has proven to be particularly advantageous that the model parameters for the deformation and damage models developed or used can largely be determined experimentally in our own laboratory and that the simulation results can be verified experimentally.The device applied for is best classified as a thermomechanical material testing machine. The principle of combining a hydraulic material testing machine with direct heating of the sample by conducting electricity through it is unique and known simply as "Gleeble" in professional circles. This enables simultaneous, independent and precise control of temperature and mechanical parameters such as mechanical stress or strain. The resistive heating enables very high heating rates (up to 10,000 K/s) with a very homogeneous temperature distribution over the cross section. With hollow specimens cooled from the inside, high cooling rates are also possible. Measurements into the molten state are possible. Together, they give the device enormous flexibility.The device applied for would fill an important gap and enable thermomechanical material characterization in areas that were previously not possible to reach, but need to be covered for future research questions. With extremely high heating and cooling rates while ensuring a homogeneous temperature distribution, processes such as inductive hardening, grinding and welding as well as some additive manufacturing processes can be simulated and mechanical parameters can be determined. The device applied for will be used both for the determination of basic mechanical parameters for simulations and for the experimental verification of the results of the simulations. The ICME methodology is used to develop digital twins and digital shadows for processes, materials and components. As a result, the entire process chain is described virtually and the material and component properties are determined in great detail (digital twin). For additive manufacturing of metals, we hope to gain extensive knowledge about microstructure formation and damage mechanisms during the process.