SFB 459:  Shape Memory Technology - Fundamentals, Engineering Design and Applications, Processing and Manufacturing

• Subject Area: Materials Science and Engineering
• Term: from 2000 to 2011
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 5483976

Thermal and mechanical shape memory are both based on the martensitic transformation which is diffusionless. Lattice shear processes are associated with a cooperative movement of atoms. Although the displacement of each atom is not large, the martensitic transformation results in a shape change, since all atoms within one domain or variant move in the same direction. As as result, unique properties arise, such as the one way effect and pseudoelasticity. These unique properties make shape memory alloys (SMAs) potential candidates for many interesting functional applications. However, new shape memory applications (couplings, sensors, actuators, deploying devices, implants, …) can only be successfully launched when two basic requirements are fulfilled:
(1) High quality materials with good reproducibility of structural and functional properties must be made available at reasonable prices.
(2) Design principles must be found which make the best use of SMA properties without exceeding the physical limitations of the materials. Progress in the science and technology of SMAs can therefore only be achieved by a side-by-side development of (A) fundamentals, (B) engineering design and applications and (C) processing and manufacturing. This sets the frame for our collaborative research centre 459 where scientists from engineering, physics, chemistry, crystallography and medicine join forces to contribute to a break through in shape memory technology. In the second funding phase, eighteen scientific projects closely collaborate in order to achieve progress.

• DFG Programme: Collaborative Research Centres
• International Connection: United Kingdom

Completed projects

• A01 - Mechanical properties of shape memory alloys: structural and functional fatigue (Project Heads Eggeler, Gunther ;  Wagner, Martin Franz-Xaver )
• A02 - Stoffgesetze zur Beschreibung des Verhaltens von Formgedächtnislegierungen (Project Heads Bruhns, Otto-Timme ;  Oberste-Brandenburg, Claus )
• A03 - Mikrostrukturierung von Formgedächtnislegierungen (Project Head Wieck, Andreas Dirk )
• A4 - Bruchmechanische Werkstoffcharakterisierung von Formgedächtnislegierungen (Project Head Kalthoff, Jörg F. )
• A05 - High resolution detection of corrosion of NiTi, NiTiCu and NiTi material composites with respect to applications in medical technology (Project Head Schuhmann, Wolfgang )
• A6 - Ortsaufgelöste kristallographische Untersuchungen an NiTi Bauteilen mit Beugungsmethoden (Project Head Schmahl, Wolfgang W. )
• A08 - Transmission electron microscopy and simulations of microstructural evolution in NiTi shape memory alloys (Project Heads Eggeler, Gunther ;  Somsen, Christoph ;  Steinbach, Ingo )
• A09 - Micromechanical modeling of shape memory materials (Project Heads Hackl, Klaus ;  Hoppe, Ulrich )
• A11 - 3D molecular-dynamics simulations of structural and functional characteristics of shape memory alloys (Project Heads Drautz, Ralf ;  Kastner, Oliver )
• B01 - Design of smart shape memory structures and compilation of data in a knowledge and method base (Project Heads Sadek Hassanein, Tim ;  Welp, Ewald Georg )
• B03 - Engineering aspects of processing and performance of shape memory polymers (Project Heads Eggeler, Gunther ;  Neuking, Klaus )
• B05 - Formgedächtnislegierungen in der Antriebstechnik unter Betrachtung der Aspekte: Dämpfung, Kerbwirkung, Spieleinstellung bei Wälzlagern und Getrieben, Kupplungen (Project Head Predki, Wolfgang )
• B06 - Computer-assisted design of shape memory actuators (Project Head Meier, Horst )
• B7 - Entwicklung eines nicht-linearen Bohrsystems für den mikrotherapeutischen Einsatz (Project Heads Bracke, Andreas ;  Eggeler, Gunther ;  Grönemeyer, Dietrich H.W. )
• B09 - Application of micro-structured Ni-Ti-X thin films: fabrication and characterization of switchable adaptive surfaces (Project Head Ludwig, Alfred )
• B10 - Finite-Elemente-Modellierung des Strukturverhaltens von NiTi-Legierungen in medizinischen Anwendungen und Verbundsystemen (Project Head Reese, Stefanie )
• B11 - Entwicklung einer kieferchirurgischen Säge und eines NiTi-Verbindungs-Stents für Dysgnathie- bzw. Rekonstruktionsoperation (Project Heads Böckmann, Roland ;  Eggeler, Gunther ;  Neuking, Klaus ;  Wolff, Klaus-Dietrich )
• B12 - Simulation von Formgedächtnis-Bauteilen und Schlüsselexperimenten (Project Heads Hackl, Klaus ;  Hartmaier, Alexander ;  Hoppe, Ulrich ;  Kastner, Oliver )
• C1 - Untersuchungen zum Kriechen von NiTi-Legierungen und zum Einfluss von Kriechverformungen auf Phasenumwandlungstemperaturen (Project Head Eggeler, Gunther )
• C02 - Pulvermetallurgie von Formgedächtnislegierungen (Project Heads Buchkremer, Hans Peter ;  Stöver, Detlev )
• C03 - Strain tolerant wear protection on NiTi-surfaces (Project Heads Ludwig, Alfred ;  Pohl, Michael )
• C04 - Machining and micro-machining of NiTi shape memory alloys (Project Heads Biermann, Dirk ;  Weinert, Klaus D. )
• C05 - Fügen von NiTi-Formgedächtnislegierungen (Project Head Theisen, Werner )
• C06 - Structure modification of biomedical NiTi surfaces for optimal tissue contact (Project Heads Esenwein, Stefan A. ;  Köller, Manfred ;  Pohl, Michael ;  Theisen, Werner )
• C07 - Ingot metallurgy and thermomechanical processing (Project Heads Eggeler, Gunther ;  Frenzel, Jan ;  Neuking, Klaus )
• C8 - Herstellung, Charakterisierung und Modellierung dünner Formgedächtnisschichten (Project Heads Hackl, Klaus ;  Ludwig, Alfred ;  Quandt, Eckhard ;  Winzek, Bernhard )
• C09 - Combinatorial development of ternary and quaternary shape memory thin film systems with optimized properties (Project Head Ludwig, Alfred )
• C10 - Laser assisted near net-shape processing of complex NiTi-based shape memory components (Project Heads Frenzel, Jan ;  Meier, Horst )
• C11 - Laserbasierte Herstellung und Charakterisierung von NiTi-Nanopartikeln (Project Head Ostendorf, Andreas )
• T01 - Manufacturing of functional components made of NiTi-X basis powders by metal injection moulding (Project Heads Bram, Martin ;  Buchkremer, Hans Peter ;  Stöver, Detlev )
• T02 - Production and properties of welded joints in medical components with small dimensions (Project Head Theisen, Werner )
• T03 - Influence of processing parameters on high cycle fatigue of NiTi shape memory alloys (Project Heads Böckmann, Roland ;  Eggeler, Gunther ;  Frenzel, Jan ;  Kunkel, Martin ;  Wagner, Martin Franz-Xaver )
• T04 - System integration of SMA-actuators with respect to design, joining techniques, fatigue and dynamics (Project Heads Sadek Hassanein, Tim ;  Theisen, Werner ;  Wagner, Martin Franz-Xaver )
• T05 - Formgedächtnislegierungen in der Antriebstechnik: Spieleinstellung bei Umlaufgetrieben; Reibung und Verschleiß im geschmierten Kontakt (Project Head Predki, Wolfgang )
• Z01 - Central tasks and common Organizations of the Collaborative Research Center (Project Head Eggeler, Gunther )

• Applicant Institution: Ruhr-Universität Bochum
• Participating University: Technische Universität Dortmund
• Participating Institution: Forschungszentrum Jülich
• Spokesperson: Professor Dr.-Ing. Gunther Eggeler