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Aufsatz
Effect of Compositional Variation Induced by EBM Processing on Deformation Behavior and Phase Stability of Austenitic Cr-Mn-Ni TRIP Steel
(2020-01-24)
Electron beam melting (EBM) is an established powder bed-based additive manufacturing process for the fabrication of complex-shaped metallic components. For metastable austenitic Cr-Mn-Ni TRIP steel, the formation of a homogeneous fine-grained microstructure and outstanding damage tolerance have been reported. However, depending on the process parameters, a certain fraction of Mn evaporates. This can have a significant impact on deformation mechanisms as well as kinetics, as was previously shown for as-cast material. ...
Aufsatz
On the Impact of Texture and Grain Size on the Pseudoelastic Properties of Polycrystalline Fe–Ni–Co–Al–Ti Alloy
(2020-05-08)
The effects of thermomechanical treatments on crystallographic texture and grain size evolution and their impact on the pseudoelastic properties in Fe41–Ni28–Co17–Al11.5–Ti2.5 (at.%) were studied in the present paper. The results show that cold rolling leads to brass-type texture in this alloy, which is typical for low stacking fault energy materials. Thermal treatments up to 1300 °C were conducted and it is shown that the presence of β-phase helps to control grain growth. After the dissolution of the secondary phase ...
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
Influences on the mechanical properties of SRCs in a combined compacting and back injecting process
(2022-03-03)
In this research paper, the effects of the combined compacting and back-injection process to produce back-injected self-reinforced composites on the mechanical properties of the self-reinforced composites (SRCs) are investigated. For this purpose, the parameters barrel temperature, time of injection and holding pressure were varied for the back injection. Tensile and bending tests were carried out on the SRCs. The results show that the mechanical properties depend to a large extent on the process parameters. The ...
Rezension
[Rezension zu:] Katrin Kogman-Appel, Catalan Maps and Jewish Books. The Intellectual Profile of Elisha ben Abraham Cresques (1325-1387) (Terrarum Orbis, Vol. 15), Turnhout, Brepols 2020. 358 S., 108 Abb., € 125,-.
(2022-02-01)
Rezension von Ingrid Baumgärtner zu: Katrin Kogman-Appel, Catalan Maps and Jewish Books. The Intellectual Profile of Elisha ben Abraham Cresques (1325-1387) (Terrarum Orbis, Vol. 15), Turnhout, Brepols 2020. 358 S., 108 Abb., € 125,-.
Video
JOHN F. C. TURNER EN PERÚ
(2022-12-16)
La conferencia, basada en la colaboración con Turner y una labor de reactivación de memoria urbana en barriadas turnerianas, presenta aspectos de su legado poco conocidos y dignos de servir de base para nuevas lecturas del urbanismo peruano y en particular de los barrios autoconstruidos de Lima. Invita a explorar la visión holística de Turner con miras a lo que puede aportar para imaginar el desarrollo colectivamente gestionado y sostenible de una multitud de barrios que hoy se expanden en zonas naturales y sobre ...
Video
DEL QHAPAQ ÑAN A LAS RUTAS COLONIALES
(2023-03-17)
En un mismo territorio se instalan primero el Tahuantinsuyo y luego el Virreinato del Perú, y, sobre la base de ambos, desde la Independencia, la República del Perú.
Los cambios estructurales en lo social, económico y político en el paso de una civilización autóctona a una economía y sociedad coloniales se expresan también en las diferentes estrategias de ocupación del territorio.
La presente conferencia esboza la gestación y transformación de la estructura vial peruana en sus momentos constitutivos como base y ...
Video
PIURA
(2023-03-31)
Desde su fundación española en 1532, el medio geográfico, las transformaciones económicas y una planificación insuficiente marcan una relación conflictiva entre la ciudad y su entorno, caracterizado por el bosque seco tropical renovado de modo cíclico por El Niño. Víctor Velezmoro presenta el devenir histórico de una ciudad que se sofoca ante la ausencia de un plan que permita enfrentar la dicotomía de su ubicación en el desierto y a la vez sujeta a inundaciones.
Víctor Velezmoro Montes
Licenciado en Arte por ...
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 ...