@inbook{41959, author = {{Grydin, Olexandr and Garthe, Kai-Uwe and Yuan, Xueyang and Broer, Jette and Keßler, Olaf and Králík, Rostislav and Cieslar, Miroslav and Schaper, Mirko}}, booktitle = {{Light Metals 2023}}, editor = {{Broek, Stephan}}, isbn = {{9783031225314}}, issn = {{2367-1181}}, pages = {{1031--1037}}, publisher = {{Springer Nature Switzerland}}, title = {{{Numerical and Experimental Investigation of Twin-Roll Casting of Aluminum–Lithium Strips}}}, doi = {{10.1007/978-3-031-22532-1_137}}, year = {{2023}}, } @inbook{34211, abstract = {{Nowadays, clinching is a widely used joining technique, where sheets are joined by pure deformation to create an interlock without the need for auxiliary parts. This leads to advantages such as reduced joining time and manufacturing costs. On the other hand, the joint strength solely relies on directed material deformation, which renders an accurate material modelling essential to reliably predict the joint forming. The formation of the joint locally involves large plastic strains and possibly complex non-proportional loading paths, as typical of many metal forming applications. Consequently, a finite plasticity formulation is utilised incorporating a Chaboche–Rousselier kinematic hardening law to capture the Bauschinger effect. Material parameters are identified from tension–compression tests on miniature spec- imens for the dual-phase steel HCT590X. The resulting material model is implemented in LS-Dyna to study the locally diverse loading paths and give a quantitative statement on the importance of kinematic hardening for clinching. It turns out that the Bauschinger effect mainly affects the springback of the sheets and has a smaller effect on the joint forming itself.}}, author = {{Friedlein, Johannes and Mergheim, Julia and Steinmann, Paul}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, keywords = {{Clinching, Material modelling, Kinematic hardening, Parameter identification, Bauschinger effect}}, publisher = {{Springer International Publishing}}, title = {{{Influence of Kinematic Hardening on Clinch Joining of Dual-Phase Steel HCT590X Sheet Metal}}}, doi = {{10.1007/978-3-031-06212-4_31}}, year = {{2022}}, } @inbook{34212, abstract = {{Force–displacement measurements and micrograph analyses are commonly used methods to validate numerical models of clinching processes. However, these methods often lead to resetting of elastic deformations and crack- closing after unloading. In contrast, the in situ computed tomography (CT) can provide three-dimensional images of the clinch point under loading conditions. In this paper, the potential of the in situ investigation of a clinching process as validation method is analyzed. For the in situ testing, a tailored test set-up featuring a beryllium cylinder for load-bearing and clinching tools made from ultra-high-strength titanium and Si3N4 are used. In the experiments, the clinching of two aluminum sheets is interrupted at specific process steps in order to perform the CT scans. It is shown that in situ CT visualizes the inner geometry of the joint at high precision and that this method is suitable to validate numerical models.}}, author = {{Köhler, Daniel and Kupfer, Robert and Troschitz, Juliane and Gude, Maik}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, keywords = {{Clinching, Non-destructive testing, Computed tomography, In situ CT}}, publisher = {{Springer International Publishing}}, title = {{{Clinching in In Situ CT—A Novel Validation Method for Mechanical Joining Processes}}}, doi = {{10.1007/978-3-031-06212-4_75}}, year = {{2022}}, } @inbook{33728, author = {{Bielak, C. R. and Böhnke, M. and Bobbert, M. and Meschut, G.}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, publisher = {{Springer International Publishing}}, title = {{{Development of a Numerical 3D Model for Analyzing Clinched Joints in Versatile Process Chains}}}, doi = {{10.1007/978-3-031-06212-4_15}}, year = {{2022}}, } @inbook{33003, author = {{Böhnke, Max and Bielak, Christian Roman and Bobbert, Mathias and Meschut, Gerson}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, location = {{Toronto, Kanada}}, publisher = {{Springer International Publishing}}, title = {{{Development of a Modified Punch Test for Investigating the Failure Behavior in Sheet Metal Materials}}}, doi = {{10.1007/978-3-031-06212-4_52}}, year = {{2022}}, } @inbook{34210, abstract = {{The application of the mechanical joining process clinching enables the joining of sheet metals with a wide range of material-thickness configurations, which is of interest in lightweight construction of multi-material structures. Each material-thickness combination results in a joint with its own property profile that is affected differently by variations. Manufacturing process-related effects from preforming steps influence the geometric shape of a clinched joint as well as its load-bearing capacity. During the clinching process high degrees of plastic strain, increased temperatures and high strain rates occur. In this context, a 3D numerical model was developed which can represent the material-specific behaviour during the process chain steps sheet metal forming, joining, and loading phase in order to achieve a high predictive accuracy of the simulation. Besides to the investigation of the prediction accuracy, the extent of the influence of individual modelling aspects such as temperature and strain rate dependency is examined.}}, author = {{Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, publisher = {{Springer International Publishing}}, title = {{{Development of a Numerical 3D Model for Analyzing Clinched Joints in Versatile Process Chains}}}, doi = {{10.1007/978-3-031-06212-4_15}}, year = {{2022}}, } @inbook{51195, author = {{Köhler, Daniel and Kupfer, Robert and Troschitz, Juliane and Gude, Maik}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783031062117}}, issn = {{2367-1181}}, publisher = {{Springer International Publishing}}, title = {{{Clinching in In Situ CT—A Novel Validation Method for Mechanical Joining Processes}}}, doi = {{10.1007/978-3-031-06212-4_75}}, year = {{2022}}, } @inbook{29771, author = {{Grydin, Olexandr and Mortensen, Dag and Neuser, Moritz and Lindholm, Dag and Fjaer, Hallvard G. and Schaper, Mirko}}, booktitle = {{Light Metals 2022}}, isbn = {{9783030925284}}, issn = {{2367-1181}}, publisher = {{Springer International Publishing}}, title = {{{Numerical and Experimental Investigation of Heat Transfer in the Solidification-Deformation Zone During Twin-Roll Casting of Aluminum Strips}}}, doi = {{10.1007/978-3-030-92529-1_96}}, year = {{2022}}, } @inbook{25448, author = {{Heggemann, Thomas and Sapli, Hüseyin and Homberg, W.}}, booktitle = {{Forming the Future}}, issn = {{2367-1181}}, title = {{{Experimental and Numerical Investigations into the Influence of the Process Parameters During the Deep Drawing of Fiber Metal Laminates}}}, doi = {{10.1007/978-3-030-75381-8_219}}, year = {{2021}}, } @inbook{23385, abstract = {{Innovative self-correcting process control techniques which adapt to the initial geometric characteristics of the strip are a promising approach to fix the local varying distortion of coiled strips by optimizing the leveling process. This paper presents an innovative strategy to improve straightening of AHSS materials (1.4310). This implies optimized leveling, adding minimal plastic deformation, and, thus, strain hardening. Therefore, an “intelligent straightening machine” is being developed which will be presented. To operate an intelligent straightening machine a reliable online measurement of the surface defects is fundamentally essential. This paper describes an approach towards the measurement of a bent steel strip for an automatic straightening process. Therefore, various ways of measuring the bending curvature are investigated. Optical, tactile, and the electromagnetic induction testing MagnaTest are compared with each other. The bending measurement is linked to open-loop control, providing an optimal straightening result in regards of formability, leveling, and reduced strain hardening.}}, author = {{Bader, Fabian and Bathelt, Lukas and Djakow, Eugen and Homberg, Werner and Henke, Christian and Trächtler, Ansgar}}, booktitle = {{Forming the Future}}, issn = {{2367-1181}}, title = {{{Self-optimized, Intelligent Open-Loop-Controlled Steel Strip Straightening Machine for Advanced Formability}}}, doi = {{10.1007/978-3-030-75381-8_1}}, year = {{2021}}, } @inbook{22766, author = {{Dahms, Frederik and Homberg, Werner}}, booktitle = {{Forming the Future}}, issn = {{2367-1181}}, location = {{Ohio, USA, VIRTUAL EVENT}}, pages = {{2249--2259}}, publisher = {{Springer, Cham}}, title = {{{Investigations and Improvements in 3D-DIC Optical Residual Stress Analysis—A New Temperature Compensation Method}}}, doi = {{10.1007/978-3-030-75381-8_189}}, year = {{2021}}, } @inbook{30296, author = {{Wiens, Eugen and Homberg, Werner and Arian, Bahman and Möhring, Kerstin and Walther, Frank}}, booktitle = {{Forming the Future}}, isbn = {{9783030753801}}, issn = {{2367-1181}}, location = {{Virtual Event}}, publisher = {{Springer International Publishing}}, title = {{{Forming of Parts with Locally Defined Mechanical and Ferromagnetic Properties by Flow-Forming}}}, doi = {{10.1007/978-3-030-75381-8_160}}, year = {{2021}}, } @inbook{23801, author = {{Reitz, Alexander and Grydin, Olexandr and Schaper, Mirko}}, booktitle = {{The Minerals, Metals & Materials Series}}, issn = {{2367-1181}}, publisher = {{Springer}}, title = {{{Phase Transformation Characterization by Means of High Temperature Digital Image Correlation for Graded Thermo-Mechanical Processing of Sheet Parts}}}, doi = {{10.1007/978-3-030-36628-5_7}}, year = {{2020}}, } @inbook{24575, author = {{Grydin, Olexandr and Stolbchenko, Mykhailo and Schaper, Mirko}}, booktitle = {{Light Metals 2020}}, issn = {{2367-1181}}, pages = {{1039--1044}}, title = {{{Influence of Nozzle Shape on Near-Surface Segregation Formation During Twin-Roll Casting of Aluminum Strips}}}, doi = {{10.1007/978-3-030-36408-3_141}}, year = {{2020}}, } @inbook{24097, author = {{Hoyer, Kay-Peter and Schaper, Mirko}}, booktitle = {{TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings}}, issn = {{2367-1181}}, title = {{{Alloy Design for Biomedical Applications in Additive Manufacturing}}}, doi = {{10.1007/978-3-030-05861-6_44}}, year = {{2019}}, } @inbook{24098, author = {{Tasche, Lennart and Hoyer, Kay-Peter and Zhuravlev, Evgeny and Grundmeier, Guido and Schaper, Mirko and Keßler, Olaf}}, booktitle = {{TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings}}, issn = {{2367-1181}}, title = {{{Surface Inoculation of Aluminium Powders for Additive Manufacturing Guided by Differential Fast Scanning Calorimetry}}}, doi = {{10.1007/978-3-030-05861-6_45}}, year = {{2019}}, } @inbook{22835, author = {{Tasche, Lennart and Hoyer, Kay-Peter and Zhuravlev, Evgeny and Grundmeier, Guido and Schaper, Mirko and Keßler, Olaf}}, booktitle = {{TMS 2019 148th Annual Meeting & Exhibition Supplemental Proceedings}}, issn = {{2367-1181}}, title = {{{Surface Inoculation of Aluminium Powders for Additive Manufacturing Guided by Differential Fast Scanning Calorimetry}}}, doi = {{10.1007/978-3-030-05861-6_45}}, year = {{2019}}, } @inbook{41523, author = {{Tasche, Lennart and Hoyer, Kay-Peter and Zhuravlev, Evgeny and Grundmeier, Guido and Schaper, Mirko and Keßler, Olaf}}, booktitle = {{The Minerals, Metals & Materials Series}}, isbn = {{9783030058609}}, issn = {{2367-1181}}, publisher = {{Springer International Publishing}}, title = {{{Surface Inoculation of Aluminium Powders for Additive Manufacturing Guided by Differential Fast Scanning Calorimetry}}}, doi = {{10.1007/978-3-030-05861-6_45}}, year = {{2019}}, } @inbook{23910, author = {{Andreiev, Anatolii and Grydin, Olexandr and Schaper, Mirko}}, booktitle = {{Proceedings of the 3rd Pan American Materials Congress}}, issn = {{2367-1181}}, title = {{{A Rapid Heating Method for Press Hardening Processing}}}, doi = {{10.1007/978-3-319-52132-9_72}}, year = {{2017}}, }