Metallic Materials: Research
The research activities carried out at the Institute of Materials Engineering - Metallic Materials can be summarized under the topic of processing-microstructure-properties relationships. There are seven working groups being closely networked with the following main research areas:
- Influence of residual stresses on deformation and fracture behavior
- Microstructure and properties of welded, brazed and additively manufactured structures
- Microstructural characterization of machined or strengthened surface layers
- Effects of manufacturing processes as well as shot peening and deep rolling treatments on fatigue strength
- Investigation of fundamental issues related to the origin, determination and evaluation of residual stresses
- Residual stress analysis in boundary zones as well as welded and additively manufactured structures
- Residual stress analyses with mechanical and X-ray techniques
- Analysis of textures and phase fractions
- Addressing fundamental issues related to the causes, determination and evaluation of residual stresses
- Residual stress analyses in edge layers, welded joints and additively manufactured structures
- Residual stress analyses with mechanical and X-ray methods
- Analysis of textures and phase fractions
- Joining of high-strength steels and aluminum alloys
- Technical aspects of welding and brazing
- Short-term heat treatments
- Selective electron beam melting (ARCAM process)
- Selective laser melting (SLM process)
- New materials for additive manufacturing
- Direct microstructure design
- Thermal and mechanical post-process treatments
- Mechanical properties of additively manufactured structures
- High temperature shape memory materials
- Fe-based shape memory materials
- Microstructure design
- Functional fatigue
- Modeling of fundamental processes in the fields of materials engineering
The results of our research can be found in the doctoral theses and publications of our department.
In all fields, fundamental and application-oriented aspects are focused in a balanced manner. In particular, technical issues as well as the evaluation of damage and failure cases are addressed in close cooperation with industrial partners. A wide range of modern testing equipment is available to the working groups for the investigations. For example, several computer-controlled X-ray diffractometers are available for stress, phase and texture analysis. In addition, all arc welding processes can be used in the welding laboratory for fabrication of well-defined weld seams. In turn, additive manufacturing, so-called "metal 3D printing", is feasible via electron beam melting and selective laser melting technique. Furthermore, by means of modern hardware and software equipment including mechanical and servo-hydraulic testing machines the working group is able to perform complex fatigue and crack propagation investigations.
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