@article{41518,
  author       = {{Tillmann, Wolfgang and Hagen, Leif and Garthe, Kai-Uwe and Hoyer, Kay-Peter and Schaper, Mirko}},
  issn         = {{0933-5137}},
  journal      = {{Materialwissenschaft und Werkstofftechnik}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}},
  number       = {{11}},
  pages        = {{1452--1464}},
  publisher    = {{Wiley}},
  title        = {{{Effect of substrate pre‐treatment on the low cycle fatigue performance of tungsten carbide‐cobalt coated additive manufactured 316 L substrates}}},
  doi          = {{10.1002/mawe.202000109}},
  volume       = {{51}},
  year         = {{2020}},
}

@article{23797,
  abstract     = {{<jats:title>Abstract</jats:title>
<jats:p>Safety-relevant components in automobiles require materials that combine high strength with sufficient residual ductility and high-energy absorption. A graded thermo-mechanical treatment of the press-hardening steel 22MnB5 with graded microstructure can provide a material with such properties. Different austenitization temperatures, cooling and forming conditions within a sheet part lead to the development of microstructures with mixed phase compositions. To determine the resulting phase contents in such graded processed parts, a large number of dilatometric tests are usually required. With a non-contact characterization method, it is possible to detect local phase transformations on an inhomogeneously treated flat steel specimen. For press-hardening steel after heat treatment and thermo-mechanical processing, correlations between austenitization temperature, hot deformation strain, microstructure, and hardness are established.</jats:p>}},
  author       = {{Reitz, Alexander and Grydin, Olexandr and Schaper, Mirko}},
  issn         = {{1073-5623}},
  journal      = {{Metallurgical and Materials Transactions A}},
  pages        = {{5628--5638}},
  publisher    = {{Springer}},
  title        = {{{Characterization of Phase Transformations During Graded Thermo-Mechanical Processing of Press-Hardening Sheet Steel 22MnB5}}},
  doi          = {{10.1007/s11661-020-05976-x}},
  year         = {{2020}},
}

@article{24573,
  abstract     = {{<jats:p>Al-Li based alloys are attractive materials for the aerospace industry. The twin-roll casting of such materials could provide properties not achievable by conventional direct-chill casting and downstream processing methods due to significantly higher solidification rates. An Al-Li-Cu-Mg-Zr alloy was twin-roll cast with the same alloy containing a small addition of Sc. The microstructure of as-cast materials and the influence of Sc on the behavior of the alloy at elevated temperatures were studied by means of light and electron microscopy and by resistivity measurements. A fine-grained structure was formed during twin-roll casting, but several surface and internal defects were found on the strips, which should be suppressed by a further adjustment of the casting conditions. The addition of Sc had a positive effect on grain size uniformity and microstructure stabilization at elevated temperatures, as shown by the precipitation of a fine dispersion of coherent Sc- and Zr-containing precipitates.</jats:p>}},
  author       = {{Grydin, Olexandr and Stolbchenko, Mykhailo and Schaper, Mirko and Belejová, Sára and Králík, Rostislav and Bajtošová, Lucia and Křivská, Barbora and Hájek, Michal and Cieslar, Miroslav}},
  issn         = {{2075-4701}},
  journal      = {{Metals}},
  number       = {{8}},
  title        = {{{New Twin-Roll Cast Al-Li Based Alloys for High-Strength Applications}}},
  doi          = {{10.3390/met10080987}},
  volume       = {{10}},
  year         = {{2020}},
}

@article{24100,
  abstract     = {{Zinc oxide (ZnO) hollow spheres with defined morphology and micro-/nanostructure are prepared by a hydrothermal synthesis approach. The materials possess fine-leaved structures at their particle surface (nanowall hollow micro spheres). Morphology control is achieved by citric acid used as an additive in variable relative quantities during the synthesis. The structure formation is studied by various time-dependent ex situ methods, such as scanning electron microscopy, x-ray diffraction, and Raman spectroscopy. The fine-leaved surface structure is characterized by high-resolution transmission electron microscopy techniques (HRTEM, STEM), using a high-angle annular dark field detector, as well as by differential phase contrast analysis. In-depth structural characterization of the nanowalls by drop-by-drop ex situ FE-SEM analysis provides insight into possible structure formation mechanisms. Further investigation addresses the thermal stability of the particle morphology and the enhancement of the surface-to-volume ratio by heat treatment (examined by N2 physisorption).}},
  author       = {{Engelkemeier, Katja and Lindner, Jörg and Bürger, Julius and Vaupel, Kathrin and Hartmann, Marc and Tiemann, Michael and Hoyer, Kay-Peter and Schaper, Mirko}},
  issn         = {{0957-4484}},
  journal      = {{Nanotechnology}},
  pages        = {{095701}},
  title        = {{{Nano-architectural complexity of zinc oxide nanowall hollow microspheres and their structural properties}}},
  doi          = {{10.1088/1361-6528/ab55bc}},
  volume       = {{31}},
  year         = {{2020}},
}

@article{24572,
  abstract     = {{<jats:p> This experiment studied the strain parameters of rolling an aluminum matrix when wire netting is inserted between aluminum layers. During the experiment, two types of stainless steel fabric netting oriented parallel and diagonal to the rolling axis were placed between two aluminum strips and rolled. Multiple rolling processes were performed in which the temperature and pressure on the material were varied to produce bonding of matrix layers. During the study, the following main investigations were made: strain on areas of longitudinal and transverse cross sections of the composite was measured; stretching and ovalization of net wiring and changes in the net cell angles were determined; mechanical properties of composites along the rolling direction were tested. The main contradiction resulting from this experiment was as follows: the contact pressure required for the bonding of aluminum layers produces extreme tensile strain on the inserted net wires, reducing the mechanical properties of the reinforcing net and thus reducing properties of the entire composite. Optimal results in the longitudinal tension tests were achieved by using strips with diagonally oriented net-reinforcement. </jats:p>}},
  author       = {{Stolbchenko, Mykhailo and Makeieva, Hanna and Grydin, Olexandr and Frolov, Yaroslav and Schaper, Mirko}},
  issn         = {{1099-6362}},
  journal      = {{Journal of Sandwich Structures & Materials}},
  number       = {{6}},
  pages        = {{2009--2029}},
  title        = {{{Strain parameters at hot rolling of aluminum strips reinforced with steel netting}}},
  doi          = {{10.1177/1099636218792539}},
  volume       = {{22}},
  year         = {{2020}},
}

@article{41520,
  author       = {{Wu, Haoran and Bill, T. and Teng, Z.J. and Pramanik, Sudipta and Hoyer, Kay-Peter and Schaper, Mirko and Starke, Peter}},
  issn         = {{0921-5093}},
  journal      = {{Materials Science and Engineering: A}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}},
  publisher    = {{Elsevier BV}},
  title        = {{{Characterization of the fatigue behaviour for SAE 1045 steel without and with load-free sequences based on non-destructive, X-ray diffraction and transmission electron microscopic investigations}}},
  doi          = {{10.1016/j.msea.2020.139597}},
  volume       = {{794}},
  year         = {{2020}},
}

@article{41521,
  author       = {{Tillmann, Wolfgang and Lopes Dias, Nelson Filipe and Stangier, Dominic and Hagen, Leif and Schaper, Mirko and Hengsbach, Florian and Hoyer, Kay-Peter}},
  issn         = {{0257-8972}},
  journal      = {{Surface and Coatings Technology}},
  keywords     = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics, General Chemistry}},
  publisher    = {{Elsevier BV}},
  title        = {{{Tribo-mechanical properties and adhesion behavior of DLC coatings sputtered onto 36NiCrMo16 produced by selective laser melting}}},
  doi          = {{10.1016/j.surfcoat.2020.125748}},
  volume       = {{394}},
  year         = {{2020}},
}

@article{41522,
  author       = {{Andreiev, Anatolii and Hoyer, Kay-Peter and Grydin, Olexandr and Frolov, Yaroslav and Schaper, Mirko}},
  issn         = {{0933-5137}},
  journal      = {{Materialwissenschaft und Werkstofftechnik}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Condensed Matter Physics, General Materials Science}},
  number       = {{4}},
  pages        = {{517--530}},
  publisher    = {{Wiley}},
  title        = {{{Degradable silver‐based alloys}}},
  doi          = {{10.1002/mawe.201900191}},
  volume       = {{51}},
  year         = {{2020}},
}

@article{24571,
  author       = {{Stolbchenko, Mykhailo and Frolov, Yaroslav and Makeieva, Hanna and Grydin, Olexandr and Tershakovec, Michael A. and Schaper, Mirko}},
  issn         = {{1537-6494}},
  journal      = {{Mechanics of Advanced Materials and Structures}},
  number       = {{18}},
  pages        = {{1599--1608}},
  title        = {{{The mechanical properties of rolled wire-reinforced aluminum composites at different strain values}}},
  doi          = {{10.1080/15376494.2018.1520941}},
  volume       = {{27}},
  year         = {{2020}},
}

@article{24254,
  author       = {{Tillmann, Wolfgang and Hagen, Leif and Garthe, Kai-Uwe and Hoyer, Kay-Peter and Schaper, Mirko}},
  issn         = {{0933-5137}},
  journal      = {{Materialwissenschaft und Werkstofftechnik}},
  pages        = {{1452--1464}},
  title        = {{{Effect of substrate pre‐treatment on the low cycle fatigue performance of tungsten carbide‐cobalt coated additive manufactured 316 L substrates}}},
  doi          = {{10.1002/mawe.202000109}},
  year         = {{2020}},
}

@article{24092,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Different studies have been demonstrated that the surface integrity of substrate bulk materials to be coated has a significant impact on the adhesion of thermally sprayed coatings. It is known that the surface integrity of parts processed by selective laser melting (SLM) differs from those obtained from bulk materials. Although 316L stainless steel is among the most investigated material for SLM, the adhesion of thermally sprayed coatings on 316L stainless steel substrates processed by SLM has not been studied yet. This study aims at evaluating the effect of various mechanical pre-treatments onto 316L stainless steel substrates processed by SLM and their effect on the adhesion of high velocity oxy-fuel (HVOF)-sprayed WC-Co coatings. To differentiate between topographical effects and residual stress-related phenomena, a stress-relief heat treatment of the SLM substrates served as a reference throughout the investigations. The differently pre-treated SLM substrates were investigated with regard to the surface roughness and residual stresses. For the HVOF-sprayed SLM composites, Vickers interfacial indentation tests were conducted to assess the resulting coating adhesion. The findings demonstrated that the HVOF-sprayed WC-Co coatings predominantly exhibit good adhesion to the SLM 316L substrates. However, it was found that the stress state in the SLM 316L substrate surface is more likely to affect the adhesion of the WC-Co coating, while the substrate surface roughness showed a marginal effect.</jats:p>}},
  author       = {{Tillmann, Wolfgang and Hagen, Leif and Schaak, Christopher and Liß, Jan and Schaper, Mirko and Hoyer, Kay-Peter and Aydinöz, Mehmet Esat and Garthe, Kai-Uwe}},
  issn         = {{1059-9630}},
  journal      = {{Journal of Thermal Spray Technology}},
  pages        = {{1396--1409}},
  title        = {{{Adhesion of HVOF-Sprayed WC-Co Coatings on 316L Substrates Processed by SLM}}},
  doi          = {{10.1007/s11666-020-01081-y}},
  year         = {{2020}},
}

@article{24255,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Different studies have been demonstrated that the surface integrity of substrate bulk materials to be coated has a significant impact on the adhesion of thermally sprayed coatings. It is known that the surface integrity of parts processed by selective laser melting (SLM) differs from those obtained from bulk materials. Although 316L stainless steel is among the most investigated material for SLM, the adhesion of thermally sprayed coatings on 316L stainless steel substrates processed by SLM has not been studied yet. This study aims at evaluating the effect of various mechanical pre-treatments onto 316L stainless steel substrates processed by SLM and their effect on the adhesion of high velocity oxy-fuel (HVOF)-sprayed WC-Co coatings. To differentiate between topographical effects and residual stress-related phenomena, a stress-relief heat treatment of the SLM substrates served as a reference throughout the investigations. The differently pre-treated SLM substrates were investigated with regard to the surface roughness and residual stresses. For the HVOF-sprayed SLM composites, Vickers interfacial indentation tests were conducted to assess the resulting coating adhesion. The findings demonstrated that the HVOF-sprayed WC-Co coatings predominantly exhibit good adhesion to the SLM 316L substrates. However, it was found that the stress state in the SLM 316L substrate surface is more likely to affect the adhesion of the WC-Co coating, while the substrate surface roughness showed a marginal effect.</jats:p>}},
  author       = {{Tillmann, W. and Hagen, L. and Schaak, C. and Liß, J. and Schaper, Mirko and Hoyer, Kay-Peter and Aydinöz, M. E. and Garthe, Kai-Uwe}},
  issn         = {{1059-9630}},
  journal      = {{Journal of Thermal Spray Technology}},
  pages        = {{1396--1409}},
  title        = {{{Adhesion of HVOF-Sprayed WC-Co Coatings on 316L Substrates Processed by SLM}}},
  doi          = {{10.1007/s11666-020-01081-y}},
  year         = {{2020}},
}

@article{24093,
  author       = {{Wu, Haoran and Bill, Tobias and Teng, Zhenjie and Pramanik, Sudipta and Hoyer, Kay-Peter and Schaper, Mirko and Starke, Peter}},
  issn         = {{0921-5093}},
  journal      = {{Materials Science and Engineering: A}},
  title        = {{{Characterization of the fatigue behaviour for SAE 1045 steel without and with load-free sequences based on non-destructive, X-ray diffraction and transmission electron microscopic investigations}}},
  doi          = {{10.1016/j.msea.2020.139597}},
  year         = {{2020}},
}

@article{24094,
  author       = {{Tillmann, Wolfgang and Lopes Dias, Nelson Filipe and Stangier, Dominic and Hagen, Leif and Schaper, Mirko and Hengsbach, Florian and Hoyer, Kay-Peter}},
  issn         = {{0257-8972}},
  journal      = {{Surface and Coatings Technology}},
  title        = {{{Tribo-mechanical properties and adhesion behavior of DLC coatings sputtered onto 36NiCrMo16 produced by selective laser melting}}},
  doi          = {{10.1016/j.surfcoat.2020.125748}},
  year         = {{2020}},
}

@article{24091,
  author       = {{Tillmann, Wolfgang and Hagen, Leif and Garthe, Kai-Uwe and Hoyer, Kay-Peter and Schaper, Mirko}},
  issn         = {{0933-5137}},
  journal      = {{Materialwissenschaft und Werkstofftechnik}},
  pages        = {{1452--1464}},
  title        = {{{Effect of substrate pre‐treatment on the low cycle fatigue performance of tungsten carbide‐cobalt coated additive manufactured 316 L substrates}}},
  doi          = {{10.1002/mawe.202000109}},
  year         = {{2020}},
}

@article{23899,
  author       = {{Grydin, Olexandr and Matzelt, Manuel and Andreiev, Anatolii and Frolov, Yaroslav and Schaper, Mirko}},
  issn         = {{1438-1656}},
  journal      = {{Advanced Engineering Materials}},
  title        = {{{Influence of Microstructure in Near‐Surface Areas of Feedstocks on the Bond Strength of Roll Bonded Aluminum Clads}}},
  doi          = {{10.1002/adem.202000130}},
  year         = {{2020}},
}

@article{23896,
  author       = {{Andreiev, Anatolii and Hoyer, Kay-Peter and Grydin, Olexandr and Frolov, Yaroslaw and Schaper, Mirko}},
  issn         = {{0933-5137}},
  journal      = {{Materialwissenschaft und Werkstofftechnik}},
  pages        = {{517--530}},
  title        = {{{Degradable silver‐based alloys}}},
  doi          = {{10.1002/mawe.201900191}},
  year         = {{2020}},
}

@article{34816,
  abstract     = {{<jats:title>Zusammenfassung</jats:title><jats:p>Frühe mathematische Bildung findet in der Kindertagesstätte insbesondere in spontanen Alltagssituationen statt. Damit diese Alltagssituationen zu natürlichen Lernsituationen für die Kinder werden, müssen (angehende) frühpädagogische Fachkräfte zunächst das mathematische Potenzial in diesen Situationen erkennen. Diese Fähigkeit zur <jats:italic>situativen Beobachtung und Wahrnehmung </jats:italic>ist bisher unzureichend erforscht, was unter anderem auf begrenzte Methoden zur standardisierten Erfassung dieses Konstrukts zurückzuführen ist. Um diesem Bedarf zu begegnen, wurde das videobasierte Testinstrument <jats:italic>Vimas_num</jats:italic> zur Erfassung der Fähigkeit zur situativen Beobachtung und Wahrnehmung angehender frühpädagogischer Fachpersonen im Bereich Mengen und Zahlen entwickelt. Auf der Grundlage von drei aufeinander aufbauenden Studien wird die Validität verschiedener Aspekte der Testwertinterpretation untersucht. Die Ergebnisse geben Hinweise auf die Validität der Testwertinterpretation in Bezug auf den Testinhalt, die interne Struktur des Tests und die Zusammenhänge mit theoretisch verbundenen Konstrukten.</jats:p>}},
  author       = {{Bruns, Julia and Strahl, Carolin and Gasteiger, Hedwig}},
  issn         = {{0340-4099}},
  journal      = {{Unterrichtswissenschaft}},
  keywords     = {{Education}},
  number       = {{3}},
  pages        = {{345--371}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Situative Beobachtung und Wahrnehmung angehender frühpädagogischer Fachpersonen im Bereich Mathematik – Entwicklung und Validierung eines Testinstruments}}},
  doi          = {{10.1007/s42010-020-00091-7}},
  volume       = {{49}},
  year         = {{2020}},
}

@article{21529,
  abstract     = {{<jats:title>Zusammenfassung</jats:title><jats:p>Die Implementation früher mathematischer Bildung in Kindertagesstätten kann durch fachdidaktische Fortbildungen für frühpädagogische Fachkräfte unterstützt werden. Um Fachkräfte in der Breite zu erreichen, erscheint ein scaling up Ansatz geeignet, bei dem aufbauend auf das Fortbildungskonzept <jats:italic>EmMa – Erzieherinnen und Erzieher machen Mathematik </jats:italic>Multiplikatorinnen und Multiplikatoren qualifiziert werden. Dabei ergibt sich die Herausforderung, dass Fortbildende im Elementarbereich kaum mathematisches und mathematikdidaktisches Wissen mitbringen. Der Kontext dieser Studie ist der scaling up Prozess der Fortbildung <jats:italic>EmMa</jats:italic> unter diesen Umständen. Das Erkenntnisinteresse liegt in der Beschreibung und Bewertung der Adaptionshandlungen der Multiplikatorinnen und Multiplikatoren. Für die Bewertung der Adaptionen werden zwei Kriterien herangezogen: (1) das Kriterium der Präzision, das die Vollständigkeit und Klarheit der Inhalte umfasst und (2) das Kriterium der fachlichen Korrektheit, das durch das Ausbleiben fachbezogener Fehler beschrieben wird. Analysiert werden dabei die theoretischen, fachbezogenen Phasen der von Multiplikatorinnen und Multiplikatoren durchgeführten Fortbildung zur frühen mathematischen Bildung, da davon ausgegangen wird, dass insbesondere diese theoretischen Inhalte für diese Gruppe von Multiplikatorinnen und Multiplikatoren eine Herausforderung darstellen. Zur Untersuchung wurde eine videogestützte, qualitative Feldstudie mit <jats:italic>N</jats:italic> = 8 Fällen durchgeführt. Mit Hilfe der qualitativen Inhaltsanalyse wurden die Adaptionshandlungen der Multiplikatorinnen und Multiplikatoren charakterisiert und hinsichtlich ihrer Präzision und der fachlichen Fehler in diesen Adaptionen analysiert. Dabei zeigte sich, dass der eigenständige Umgang mit den mathematischen und mathematikdidaktischen Inhalten des Fortbildungskonzepts <jats:italic>EmMa </jats:italic>trotz intensiver Unterstützung anspruchsvoll und bei vielen Multiplikatorinnen und Multiplikatoren mit fachbezogenen Fehlern verbunden ist. Implikationen dieser Ergebnisse für die weitere Forschung werden diskutiert.</jats:p>}},
  author       = {{Bruns, Julia and Schopferer, Theresa and Gasteiger, Hedwig}},
  issn         = {{0173-5322}},
  journal      = {{Journal für Mathematik-Didaktik}},
  number       = {{1}},
  pages        = {{243--271}},
  title        = {{{Adaptionshandlungen von Multiplikatorinnen und Multiplikatoren zur frühen mathematischen Bildung – Beschreibung und Bewertung aus fachbezogener Perspektive}}},
  doi          = {{10.1007/s13138-020-00175-y}},
  volume       = {{42}},
  year         = {{2020}},
}

@inbook{21530,
  author       = {{Bruns, Julia and Carlsen, Martin and Eichen, Lars and Erfjord, Ingvald and Hundeland, Per Sigurd}},
  booktitle    = {{Mathematics Education in the Early Years}},
  isbn         = {{9783030347758}},
  pages        = {{317–332}},
  publisher    = {{Springer}},
  title        = {{{Situational Perception in Mathematics (SPiM)—Results of a Cross-Country Study in Austria and Norway}}},
  doi          = {{10.1007/978-3-030-34776-5_19}},
  year         = {{2020}},
}