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Browsing by Subject "Aluminum alloys"

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Advanced high pressure turbine blade repair technologies

Alfred, Irene; Nicolaus, Martin; Hermsdorf, Jörg; Kaierle, Stefan; Möhwald, Kai; Maier, Hans Jürgen; Wesling, Volker (Amsterdam : Elsevier B.V., 2018)

Components in aircraft engines and gas turbines are exposed to extreme conditions in order to increase performance and efficiency of the overall engine, hence there is an increasing need for cost-effective and time-efficient ...
Advanced process design for re-contouring using a time-domain dynamic material removal simulation

Denkena, Berend; Pape, O.; Grove, T.; Mücke, A. (Amsterdam : Elsevier B.V., 2019)

The repair of components often requires the removal of excess weld material. This removal is considered as re-contouring. Re-contouring processes have to be designed individually for each case of damage to fulfil the high ...
Aerodynamic damping of composite UHBR fans under the consideration of acoustic intake reflections

Gößling, Jan; Seume, Joerg R.; Flüh, Jan Peter; Paletta, Nicola; Eggers, Torben; Friedrichs, Jens; Natale, Nunzio (New York, N.Y. : The American Society of Mechanical Engineers, 2022)

Steadily rising regulations and demands on aeroengines require the continuous reduction of CO2 emissions. Among other factors, particularly the weight reduction of the engine as well as synergetic engine-airframe integration ...
Biodistribution, biocompatibility and targeted accumulation of magnetic nanoporous silica nanoparticles as drug carrier in orthopedics

Janßen, Hilke Catherina; Angrisani, Nina; Kalies, Stefan; Hansmann, Florian; Kietzmann, Manfred; Warwas, Dawid Peter; Behrens, Peter; Reifenrath, Janin (London : BioMed Central Ltd., 2020)

Background: In orthopedics, the treatment of implant-associated infections represents a high challenge. Especially, potent antibacterial effects at implant surfaces can only be achieved by the use of high doses of antibiotics, ...
Comparison of Electromagnetic and Marangoni Forces on Thin Coatings during Rapid Heating Process

Steinberg, T.; Opitz, T.; Rybakov, A.; Baake, E. (Bristol : Institute of Physics Publishing, 2018)

The present paper is dedicated to the investigation of Marangoni and Lorentz forces in a rapid heating process. During the melting of aluminum-silicon (AlSi) layer on the bor-manganese steel 22MnB5, the liquid AlSi is ...
Detection and 3D modelling of vehicles from terrestrial stereo image pairs

Coenen, Max; Rottensteiner, Franz; Heipke, Christian (Göttingen : Copernicus GmbH, 2017)

The detection and pose estimation of vehicles plays an important role for automated and autonomous moving objects e.g. in autonomous driving environments. We tackle that problem on the basis of street level stereo images, ...
Development of a laser powder bed fusion process tailored for the additive manufacturing of high-quality components made of the commercial magnesium alloy WE43

Julmi, Stefan; Abel, Arvid; Gerdes, Niklas; Hoff, Christian; Hermsdorf, Jörg; Overmeyer, Ludger; Klose, Christian; Maier, Hans Jürgen (Basel : MDPI AG, 2021)

Additive manufacturing (AM) has become increasingly important over the last decade and the quality of the products generated with AM technology has strongly improved. The most common metals that are processed by AM techniques ...
FEA-based optimisation of a clinching process with an open multiple-part die aimed at damage minimisation in CR240BH-AlSi10MnMg joints

Behrens, Bernd-Arno; Bouguecha, Anas; Vucetic, Milan; Hübner, Sven; Yilkiran, Deniz; Jin, Yilin; Peshekhodov, Ilya (Les Ulis : EDP Sciences, 2015)

The paper presents results of a FEA-based tool design optimisation for a clinching process with an open multiple-part die. The studied materials are the bake-hardening steel CR240BH (1.5 mm) on the punch side and the ...
Fluxless Brazing of aluminum alloys using non vacuum electron beam by 60kV acceleration voltage

Klimov, G.; Maier, H.-J.; Beniyash, A.; Hassel, T. (Bristol : Institute of Physics Publishing, 2018)

Lightweight construction materials, in particular aluminum alloys, have recently become more important as construction materials due to their low weight with high strength and sufficient wear and corrosion properties. In ...
Formability of 7000 aluminum alloys in warm and hot forming condition

Behrens, Bernd-Arno; Hübner, S.; Vogt, H. (Bristol : Institute of Physics Publishing, 2018)

In recent years, the automobile industry has been calling for new lightweight solutions to fulfill increasing ecologically requirements. A weight reduction of automobile body constructions is necessary to reduce fuel ...
Formation of locally aluminum-doped p-type silicon regions by in-line high-rate evaporation

Mader, Christoph; Bock, Robert; Müller, Jens; Schmidt, Jan; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)

Locally aluminum-doped p-type silicon regions are formed by in-line high-rate evaporation of aluminum. We deposit aluminum layers of 28 μm thickness at dynamic deposition rates of 20 μm×m/min on locally laser-ablated Al2O3 ...
Influence of Machining Parameters on Heat Generation during Milling of Aluminum Alloys

Denkena, Berend; Brüning, J.; Niederwestberg, D.; Grabowski, R. (Amsterdam : Elsevier, 2016)

Thin-walled components, i.e. fuselage frames of airplanes, are prone to an unstable process behavior during milling. Therefore, tools with a chamfer between the cutting edge and the flank face are often used for such ...
Influence of the ultrasonic vibration amplitude on the melt pool dynamics and the weld shape of laser beam welded EN AW-6082 utilizing a new excitation system for laser beam welding

Ohrdes, H.; Nothdurft, S.; Nowroth, C.; Grajczak, J.; Twiefel, J.; Hermsdorf, J.; Kaierle, S.; Wallaschek, J. (Berlin : Springer, 2021)

Laser beam welding is a commonly used technology for joining similar and dissimilar materials. In order to improve the mechanical properties of the weld, the introduction of ultrasonic vibration into the weld zone has been ...
Influences on the formability and mechanical properties of 7000-aluminum alloys in hot and warm forming

Behrens, Bernd-Arno; Nürnberger, F.; Bonk, Christian; Hübner, S.; Behrens, S.; Vogt, H. (Bristol : Institute of Physics Publishing, 2017)

Aluminum alloys of the 7000 series possess high lightweight potential due to their high specific tensile strength combined with a good ultimate elongation. For this reason, hot-formed boron-manganese-steel parts can be ...
Investigation of the electroplastic effect using nanoindentation

Andre, D.; Burlet, T.; Körkemeyer, F.; Gerstein, G.; Gibson, J.S.K.-L.; Sandlöbes-Haut, S.; Korte-Kerzel, S. (London : Elsevier Ltd., 2019)

A promising approach to deform metallic-intermetallic composite materials is the application of electric current pulses during the deformation process to achieve a lower yield strength and enhanced elongation to fracture. ...
Investigation on the microstructure of ecap-processed iron-aluminium alloys

Behrens, Bernd-Arno; Brunotte, Kai; Petersen, Tom; Relge, Roman (Basel : MDPI AG, 2021)

The present work deals with adjusting a fine-grained microstructure in iron-rich iron-aluminium alloys using the ECAP-process (Equal Channel Angular Pressing). Due to the limited formability of Fe-Al alloys with increased ...
Investigations on laser beam welding of different dissimilar joints of steel and aluminum alloys for automotive lightweight construction

Seffer, Oliver; Pfeifer, Ronny; Springer, André; Kaierle, Stefan (Amsterdam : Elsevier B.V., 2016)

Due to the enormous potential of weight saving, and the consequential reduction of pollutant emissions, the use of hybrid components made of steel and aluminum alloys is increasing steadily, especially concerning automotive ...
Ion Beam Processing for Sample Preparation of Hybrid Materials with Strongly Differing Mechanical Properties

Barienti, Khemais; Kahra, Christoph; Herbst, Sebastian; Nürnberger, Florian; Maier, Hans Jürgen (Heidelberg : Springer, 2020)

For studies of the interface zone of metallic composites with significantly differing mechanical properties across the interface, high-quality sample preparation is paramount. In particular, the analysis of the composition ...
Osteointegration of porous poly-ε-caprolactone-coated and previtalised magnesium implants in critically sized calvarial bone defects in the mouse model

Grau, Michael; Seiler, Christian; Roland, Laura; Matena, Julia; Windhövel, Claudia; Teske, Michael; Escobar, Hugo Murua; Lüpke, Matthias; Seifert, Hermann; Gellrich, Nils-Claudius; Haferkamp, Heinz; Nolte, Ingo (Basel : MDPI AG, 2017)

Metallic biomaterials are widely used in maxillofacial surgery. While titanium is presumed to be the gold standard, magnesium-based implants are a current topic of interest and investigation due to their biocompatible, ...
Recombination at local aluminum-alloyed silicon solar cell base contacts by dynamic infrared lifetime mapping

Müller, Jens; Bothe, Karsten; Gatz, Sebastian; Plagwitz, Heiko; Schubert, Gunnar; Brendel, Rolf (Amsterdam : Elsevier BV, 2011)

The application of local aluminum (Al)-alloyed contacts to the p-type base of silicon solar cells reduces minority charge carrier recombination due to the formation of a local back surface field (LBSF). We study the ...

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