• Additive manufacturing of functionally graded metals with coaxial powder-wire-hybrid feed
    By the processing of multi-materials with different compositions within one component, Functionally Graded Additive Manufacturing (FGAM) offers great potential for the demand-oriented design of additively manufactured functional components: By distributing different materials, the mechanical, thermal, chemical, magnetic and electrical properties of additively manufactured components can be adjusted with local resolution.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Additive manufacturing of integrated piezoresistive sensors
    Compared to conventional manufacturing processes, Additive Manufacturing offers a wide range of new design options, including a high potential for function integration. Fused Layer Modeling provides the possibility of combining several materials in one component without an additional joining process. For example, functions based on locally adapted thermal or electrical conductivity can be integrated into one component and piezoresistive structures can be realized by means of local application of composite materials.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Additive production of functionalized silicone optics
    While additive manufacturing technologies for metals and polymers have been employed successfully in industry for many years, research into the generative production of silicones is still in its infancy. Especially with regard to optical elements such as lenses, this material class offers a high potential, since it can withstand higher ambient temperatures than polymers and can also be reversibly deformed by mechanical force.
    Jahr: 2020
    Förderung: Leibniz University of Hannover
  • Atomic Layer Deposition for conformal surface functionalization of parts produced by additive manufacturing
    Additive Manufacturing Processes enable the realization of components with complex geometries using new material combinations. In addition to the mere fulfilment of structural-mechanical tasks, these components will have to offer additional functional properties to an increasing extent in the future. The surface quality, which is closely linked to the respective additive manufacturing process, often limits their possible applications. Restrictions can arise directly from the microstructure and the chemical and physical properties of the material combinations used.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Development of hybrid material systems with sensor properties
    Additive Manufacturing processes are becoming increasingly important regarding locally adapted material properties and functional integration. During the manufacturing process, inherent material properties can be specifically tailored to the respective area of application. Both the mechanical-technological and the physical properties of a component can be specifically modified.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Five-axis Adaptive Manufacturing of Fiber-reinforced Plastic Components
    A decisive factor for energy-efficient mobility is the payload ratio, which can be optimised implementing lightweight construction concepts. As the already existing lightweight applications are highly uneconomical for small series and their possible applications are limited, alternative production concepts have to be developed.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Functional nanoswitches for additively manufactured materials
    In the development of new Additive Manufacturing processes, the integration of precision optical functions places the highest demands on manufacturing tolerances. The required selective modern materials require an adaptation of the properties to a certain effect. Complex nanoswitches offer such physico-chemical property changes. Nanoswitches are able to change between different energetic electronic states physically and chemically. In doing so, properties such as refractive index, color, size, modulus of elasticity etc. change.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Non-destructive optical characterization of microoptical systems
    The Additive Manufacturing of microoptical systems allows the efficient realization of novel optical structures. For the further development and improvement of manufacturing processes and optical designs, a comprehensive characterization of the manufactured components is necessary. To date, destructive methods or functional tests are the only options available for optical characterization. However, there is a great need for new, non-destructive methods for the three-dimensional characterization of optical components.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Passive control elements for intelligent flow control in heat exchangers
    Heat exchangers are the most frequently used devices in energy and process engineering plants. Typically, one heat-emitting and one heat-absorbing fluid is involved and these are designed for a nominal load point with regard to flow rates and temperature level. In the partial load range, for example, the flow rates of the fluids can deviate significantly from the nominal load case, which typically leads to incorrect distributions and consequently poor efficiency of the apparatus.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Restriction-compliant design of additively manufactured functionalised structural components
    Within this project, a methodology for designing functional structural components manufactured by SLM processes will be developed. Special attention will be paid to the designing of new components by using knowledge about components’ conditions under the influence of mechanical loads.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Simulation and concept development for implants made of graded materials
    The use of graded materials with locally adapted properties can offer great added value for a variety of different applications. In biomedical engineering, such graded materials are of particular interest for implants, since the bimodal porous structure of bones can be reproduced and thus local mechanical properties such as stiffness or strength. For the development of implants, the stresses that occur during usage must be known and taken into account during construction.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Simulation of the laser metal deposition process using meshfree methods
    Additive manufacturing has great potential for the realization of end products with optimized geometry and tailored material properties. The laser metal deposition process (LMD process) is an excellent option for depositing high-precision materials at various locations and is therefore a suitable process for the production of multi-materials. However, the uncertain quality of the final additively manufactured component has so far been a major obstacle for the industrial application of Additive Manufacturing.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Strategies to increase product sustainability by Selective Laser Melting
    In this project, the potential of the industrial production of metallic components using Selective Laser Melting (SLM) as an Additive Manufacturing process is to be analysed with regard to ecological sustainability - defined by energy consumption over the product life cycle. The conditions under which SLM is more sustainable than existing conventional processes will be specified. This project focuses on functionalized structural components. The aim is to provide product design and quality engineers with a set of rules and to show potentials for improvements in sustainability.
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture
  • Targeted assembly of functional nanostructures by means of additive manufacturing
    The advantage of the wet chemical process for the production of nanoparticles is that various inorganic materials can be grown on many billions of nanoparticles with the precision of a few atomic monolayers. A variety of wet-chemical "bottom-up" production methods for nanoparticles of different sizes, shapes and material compositions are already known. Many of the resulting nanoscale materials have fascinating physical and chemical properties that are of great interest for a broad range of applications (e.g. catalysis, photocatalysis and sensor technology).
    Jahr: 2020
    Förderung: Lower Saxony Ministry for Science and Culture