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Aufsatz
On the low-cycle fatigue behavior of thermo-mechanically processed high-strength aluminum alloys
(2021)
In the present work low-cycle fatigue experiments were carried out on thermo-mechanically processed AA6082 and AA7075 sheets to evaluate mechanical properties under cyclic loading. Different cooling rates imposed by use of tempered forming tools after solutionizing and subsequent aging treatment led to the formation of precipitates with differing sizes and morphologies. Specimens thermo-mechanically processed in tools with temperatures of 24 °C and 200 °C showed superior mechanical properties under both monotonic and ...
Teil eines Buches
The Holy Land Geography as Emotional Experience
(De Gruyter, 2021-06-08)
In this paper,we evaluate various medieval cartographic and diagrammatic representations of the Holy Land. The analysis focuses particularly on the religious dimensions of these representations and their potential for making pilgrimage accessible, creating religious symbolism and exciting spiritual emotions. The leading hypothesis is that medieval mapmakers introduced special technical features into maps and similar cartographic representations to deepen religious emotions and to stimulate intense sensory responses ...
Aufsatz
Mittelalter erschließen
(2021-07-15)
Research communication has been gaining public attention in recent years. Therefore, medievalists also need to focus on the transfer of their research topics to the public both within and outside the university. Based on current political demands calling for a change in communication culture, the article first of all deals theoretically with two different concepts of research communication, by distinguishing between forms of translation and those of popularization. Numerous public events, exhibitions, and cooperative ...
Aufsatz
A Novel Approach to Robustly Determine Residual Stress in Additively Manufactured Microstructures Using Synchrotron Radiation
(2021-07-29)
In recent decades additive manufacturing (AM) for years has been in focus of academia and industry as its underlying production principle allows for the realization of designs of unprecedented geometrical complexity. However, often such structures are not realized due to the lack of understanding of structural and mechanical properties, this fact amongst others related to the unique microstructures established by the related processes. In this context, residual stresses, highly affected by the scan strategy and process ...
Aufsatz
Effect of Crystallographic Orientation and Grain Boundaries on Martensitic Transformation and Superelastic Response of Oligocrystalline Fe–Mn–Al–Ni Shape Memory Alloys
(2021-07-26)
In situ tensile tests employing digital image correlation were conducted to study the martensitic transformation of oligocrystalline Fe–Mn–Al–Ni shape memory alloys in depth. The influence of different grain orientations, i.e., near-〈001〉 and near-〈101〉, as well as the influence of different grain boundary misorientations are in focus of the present work. The results reveal that the reversibility of the martensite strongly depends on the type of martensitic evolving, i.e., twinned or detwinned. Furthermore, it is ...
Aufsatz
Simultaneous impact modified and chain extended glass fiber reinforced poly(lactic acid) composites: Mechanical, thermal, crystallization, and dynamic mechanical performance
(2021-02-05)
Herein, glass fiber (GF) reinforced binary, ternary, and quaternary poly(lactic acid) (PLA) composites were prepared. Toughening, and chain extension of PLA was achieved through the incorporation of impact modifier and chain extender and their concurrent effects on the spectroscopic, crystallization, mechanical, thermal, and thermomechanical properties of the composites were investigated. High mechanical properties of GF influenced the mechanical performance of the composites. However, GF alone could not restrict the ...
Aufsatz
Liquid Silicone Rubber Foams Made with Water as Blowing Agent
(2021-08-18)
Liquid silicone rubber (LSR) is primarily used in injection molding. Foamed molded parts made of LSR are almost nonexistent because the process reliability of LSR foam injection molding is currently not given. It makes sense to have suitable foaming processes for this material as well, because the density of this elastomer is about 1.15 g cm−3. With the injection molding process presented herein for foaming LSR, density reductions of up to 40% can be achieved. In this process, up to 3% by weight of water is added to ...
Teil eines Buches
Dynamiken in der Kartographie um 1500
(De Gruyter, 2021)
Auf der Suche nach dem ‚richtigen‘ kartographischen Wissen prallten im 15. Jahrhundert recht gegensätzliche Vorstellungen aufeinander: Die praktischen Erfahrungen von Seeleuten standen gegen die Anschauungen der gelehrten Kosmographen, die neuen Entdeckungen des Christoph Kolumbus gegen die alten Vermessungen des Claudius Ptolemäus, mündlich vorgetragene Erklärungen gegen schriftlich tradierte Einsichten, die Erweiterungen des geographischen Weltbilds gegen allgemein bekannte Traditionen, lokale Verfahrensweisen gegen ...
Teil eines Buches
Von der Reise zur Karte und zurück
(De Gruyter, 2021)
This essay concentrates on the creative potential of mapping for the subsequent processing of travels, experiences, and descriptions as well as on the associated cultural techniques, such as copying, imitating, quoting, de-contextualizing, re-contextualizing, and transplantation. It focuses on the transformation from travel to map and from the map back to the space traveled. Based on examples in which travel knowledge and cartographic skills are intertwined, the essay illuminates the wide spectrum of possibilities ...
Aufsatz
Geschichtswissenschaft
(2021-07-15)
Die mittelalterliche Geschichte ist derzeit noch relativ fester Bestandteil des allgemeinen Geschichtsunterrichts, obwohl die zeitliche Differenzierung durch die Kompetenzorientierung in den Lehrplänen immer weiter zurückgedrängt wird. Anders als rein chronologisch-inhaltliche Lehrpläne bietet die Kompetenzorientierung jedoch grundsätzlich gute Möglichkeiten, ‚mittelalterliches‘ Material einzubauen. In den meisten geisteswissenschaftlichen Fakultäten existiert in der Regel – mit einigen Ausnahmen – eine eigene ...