TY - JOUR AB - AbstractPure iron is very attractive as a biodegradable implant material due to its high biocompatibility. In combination with additive manufacturing, which facilitates great flexibility of the implant design, it is possible to selectively adjust the microstructure of the material in the process, thereby control the corrosion and fatigue behavior. In the present study, conventional hot-rolled (HR) pure iron is compared to pure iron manufactured by electron beam melting (EBM). The microstructure, the corrosion behavior and the fatigue properties were studied comprehensively. The investigated sample conditions showed significant differences in the microstructures that led to changes in corrosion and fatigue properties. The EBM iron showed significantly lower fatigue strength compared to the HR iron. These different fatigue responses were observed under purely mechanical loading as well as with superimposed corrosion influence and are summarized in a model that describes the underlying failure mechanisms. AU - Wackenrohr, Steffen AU - Torrent, Christof Johannes Jaime AU - Herbst, Sebastian AU - Nürnberger, Florian AU - Krooss, Philipp AU - Ebbert, Christoph AU - Voigt, Markus AU - Grundmeier, Guido AU - Niendorf, Thomas AU - Maier, Hans Jürgen ID - 30922 IS - 1 JF - npj Materials Degradation KW - Materials Chemistry KW - Materials Science (miscellaneous) KW - Chemistry (miscellaneous) KW - Ceramics and Composites SN - 2397-2106 TI - Corrosion fatigue behavior of electron beam melted iron in simulated body fluid VL - 6 ER - TY - JOUR AB - Additive manufacturing (AM) processes are not solely used where maximum design freedom meets low lot sizes. Direct microstructure design and topology optimization can be realized concomitantly during processing by adjusting the geometry, the material composition, and the solidification behavior of the material considered. However, when complex specific requirements have to be met, a targeted part design is highly challenging. In the field of biodegradable implant surgery, a cytocompatible material of an application-adapted shape has to be characterized by a specific degradation behavior and reliably predictable mechanical properties. For instance, small amounts of oxides can have a significant effect on microstructural development, thus likewise affecting the strength and corrosion behavior of the processed material. In the present study, biocompatible pure Fe was processed using electron powder bed fusion (E-PBF). Two different modifications of the Fe were processed by incorporating Fe oxide and Ce oxide in different proportions in order to assess their impact on the microstructural evolution, the mechanical response and the corrosion behavior. The quasistatic mechanical and chemical properties were analyzed and correlated with the final microstructural appearance. AU - Torrent, Christof J. J. AU - Krooß, Philipp AU - Huang, Jingyuan AU - Voigt, Markus AU - Ebbert, Christoph AU - Knust, Steffen AU - Grundmeier, Guido AU - Niendorf, Thomas ID - 30923 IS - 1 JF - Alloys SN - 2674-063X TI - Oxide Modified Iron in Electron Beam Powder Bed Fusion—From Processability to Corrosion Properties VL - 1 ER - TY - JOUR AU - Schall, Christoph Wilhelm Theodor AU - Schöppner, Volker ID - 29947 IS - 3 JF - Polymer Engineering and Science KW - Computing Resources Provided by the Paderborn Center for Parallel Computing TI - Measurement of material degradation in dependence of shear rate, temperature, and residence time VL - 62 ER - TY - JOUR AB - The presented paper aims to characterize the damage and fracture behavior of HX340LAD Micro-Alloyed steels using small punch test. Variations with respect to punch geometries and cutting clearance are made to describe the damage behavior of the material under different loading conditions. Experimental investigations are conducted to identify the crack initiation in the specimens. Furthermore, the numerical FEM simulations are performed to identify the stress state at crack initiation. It is shown that different stress states from shear to biaxial tension can be achieved by changing the geometries of punch and varying the cutting clearance. Moreover, it is presented how changing the configurations can influence the stress state variables: Triaxiality and lode angle parameter. AU - Otroshi, Mortaza AU - Meschut, Gerson ID - 27186 IS - c JF - Engineering Failure Analysis KW - Ductile damage KW - stress state KW - small punch test KW - triaxiality KW - lode angle parameter SN - 1350-6307 TI - Influence of cutting clearance and punch geometry on the stress state in small punch test VL - 136 ER - TY - CONF AU - Chudalla, Nick AU - Teutenberg, Dominik AU - Meschut, Gerson AU - Schneider, Miriam AU - Smart, Dominik ID - 30004 T2 - 22. Kolloquium: Gemeinsame Forschung in der Klebtechnik TI - Systematisierung einer rechnergestützten Auswertemethode zur Versagensanalyse geklebter Verbindungen ER - TY - JOUR AU - Reineke Matsudo, Bernhard AU - Sain, Basudeb AU - Carletti, Luca AU - Zhang, Xue AU - Gao, Wenlong AU - Angelis, Costantino AU - Huang, Lingling AU - Zentgraf, Thomas ID - 29902 IS - 12 JF - Advanced Science KW - General Physics and Astronomy KW - General Engineering KW - Biochemistry KW - Genetics and Molecular Biology (miscellaneous) KW - General Materials Science KW - General Chemical Engineering KW - Medicine (miscellaneous) SN - 2198-3844 TI - Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces VL - 9 ER - TY - JOUR AU - Vorderbrüggen, Julian AU - Köhler, Daniel AU - Grüber, Bernd AU - Troschitz, Juliane AU - Gude, Maik AU - Meschut, Gerson ID - 30911 JF - Composite Structures KW - Civil and Structural Engineering KW - Ceramics and Composites SN - 0263-8223 TI - Development of a rivet geometry for solid self-piercing riveting of thermally loaded CFRP-metal joints in automotive construction VL - 291 ER - TY - JOUR AB - The process chain for the manufacturing of sheet metal components in mass production includes various cutting and forming operations, which influence the resulting properties of the parts and therefore subsequent manufacturing steps, such as clamping and joining. It is shown that clamping of the components leads to superimposed residual stresses and geometry changes. Therefore, the part properties differ from the initial state of the semifinished products, which has to be considered in the design of clinched joints. This paper presents an approach for coupled determination of the properties of semifinished and finished parts during deep drawing and clamping as well as their effects on the joint quality during clinching. One method for the effective and efficient determination of the properties of semifinished products and components during production is using process data from the preceding manufacturing processes, which is concretely presented in this work. In addition to the interconnection of the entire production chain, it is necessary to define relevant process data for each individual manufacturing step and to correlate the data with the material properties reliably. Therefore, the cross-process interactions of different steps of the process chain for the manufacturing of sheet metal components and the effect of process variations on subsequent manufacturing steps are investigated. Consequently, the boundary conditions for a mechanical joining process based on data from preceding process steps can be predicted. AU - Heyser, Per AU - Wiesenmayer, S AU - Frey, P AU - Nehls, T AU - Scharr, C AU - Flügge, W AU - Merklein, M AU - Meschut, Gerson ID - 30904 JF - Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications KW - Mechanical Engineering KW - General Materials Science SN - 1464-4207 TI - Consideration of the manufacturing history of sheet metal components for the adaptation of a clinching process ER - TY - CHAP AU - Yigitbas, Enes AU - Sauer, Stefan AU - Engels, Gregor ED - Vogel-Heuser, Birgit ED - Wimmer, Manuel ID - 29928 T2 - Digital Transformation: Core Technologies and Emerging Topics from a Computer Science Perspective TI - Self-Adaptive Digital Assistance Systems for Work 4.0 ER - TY - JOUR AU - Gao, Wenlong AU - Sain, Basudeb AU - Zentgraf, Thomas ID - 30964 IS - 4 JF - Physical Review Applied KW - General Physics and Astronomy SN - 2331-7019 TI - Spin-Orbit Interaction of Light Enabled by Negative Coupling in High-Quality-Factor Optical Metasurfaces VL - 17 ER -