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This work covers the latest state-of-the-art research results from leading European researchers in advanced micro technologies for batch processing of metals, polymers, and ceramics, and the development of new production platforms for micro systems-based products.These contributions are from leading authors at a platform endorsed and funded by the European Union R&D community, as well as leading universities, and independent research and corporate organizations. This comprehensive collection of indexed and peer reviewed articles contains a CD with search functionality.* Contains au

Microtechnology --- Production engineering --- 621-181.48 --- Microsystems. Microtechnology. MEMS --- 4M --- Multi-material micro manufacture --- Microelectromechanical systems

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Les procédés de fabrication additive permettent de réaliser des pièces par superposition de couches successives de matière. Un grand nombre de techniques et de matériaux sont utilisés. Un de ces procédés se base sur la solidification du lit de poudre par apport de chaleur.

La société Aerosint SA a développé sa technologie propriétaire dans le domaine de la fabrication additive en concevant un système de dépôt de poudre multi-matières sélectif. Ce système permet la réalisation de pièces complexes dont la production est rendue possible par une solidification qui ne requiert aucun liant pour les poudres de céramiques ou métalliques. Actuellement, la poudre est déposée sélectivement dans le moule avant d’être placée dans un four pour subir un frittage amenant à sa solidification. Les densités des pièces obtenues sont limitées et uniquement déterminées par l’accumulation de couches de poudre. Une piste d’amélioration consisterait à intégrer une compaction de la poudre avant frittage.

Ce travail a pour objectif de développer un système de compaction séquentielle pour le procédé
étudié. Ce développement est une première dans le domaine. Tout d’abord, des recherches sur la technologie et ses besoins ont été réalisées. Combiné aux connaissances des différentes techniques de traitement des matériaux, un cahier des charge a été dégagé. La conception et le développement du système de compaction a mené à l’élaboration d’une solution complète qui pourra être intégrée dans la machine de dépôt d’Aerosint. Finalement, des analyses sur le fonctionnement, les risques et la réalisation du système ont été réalisées.

Grâce à ce projet, la technologie innovante d’Aerosint pourra produire des pièces d’une densité plus élevée, notamment des pièces en titane pour le domaine des prothèses médicales. Additive manufacturing processes allow the production of parts by superimposing successive layers of material. A large number of techniques and materials are used. One of these processes is based on the solidification of the powder bed by heat.

Aerosint SA has developed its own technology in the field of additive manufacturing by designing a selective multi-material powder deposition system. This system allows the realization of complex parts whose production is made possible by a solidification which does not require any binder, as much for ceramic or metallic powders. Currently, the powder is selectively deposited in the mold before being placed in a furnace to undergo sintering leading to its solidification. The densities of the parts obtained are limited and only determined by the accumulation of powder layers. One way of improvement would be to integrate a compaction of the powder before sintering.

The objective of this work is to develop a sequential compaction system for the studied process.
This development is a first in the field. First of all, research on the technology and its needs has
been carried out. Combined with the knowledge of the various techniques of treatment of materials, the specifications were drawn up. The design and development of the compaction system led to a complete solution that could be integrated into the Aerosint deposition machine. Finally, analyses of the operation, risks and realization of the system were carried out.

Thanks to this project, Aerosint’s innovative technology will be able to produce parts with a higher density, especially titanium parts for the medical prosthesis field.

Fabrication additive --- pressage --- poudre --- dépôt sélectif --- multi-matériaux --- Additive manufacturing --- die pressing --- powder --- selective deposition --- multi-material --- Ingénierie, informatique & technologie > Ingénierie mécanique

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In recent years, the requirements for technical components have steadily been increasing. This development is intensified by the desire for products with a lower weight, smaller size, and extended functionality, but also with a higher resistance against specific stresses. Mono-material components, which are produced by established processes, feature limited properties according to their respective material characteristics. Thus, a significant increase in production quality and efficiency can only be reached by combining different materials in a hybrid metal component. In this way, components with tailored properties can be manufactured that meet the locally varying requirements. Through the local use of different materials within a component, for example, the weight or the use of expensive alloying elements can be reduced. The aim of this Special Issue is to cover the recent progress and new developments regarding all aspects of hybrid bulk metal components. This includes fundamental questions regarding the joining, forming, finishing, simulation, and testing of hybrid metal parts.

Technology: general issues --- tailored forming --- bulk metal forming --- geometry measurement --- wrought-hot objects --- turning --- process monitoring --- feeling machine --- benchmark --- lateral angular co-extrusion --- mechanical behavior --- hybrid metal components --- ultrasound --- laser beam welding --- excitation methods --- melt pool dynamics --- nickel base alloy 2.4856 --- membrane mode enhanced cohesive zone elements --- damage --- joining zone --- cross-wedge rolling --- welding --- PTA --- LMD-W --- forming --- rolling --- coating --- hybrid bearing --- residual stresses --- X-ray diffraction --- rolling contact fatigue --- bearing fatigue life --- AISI 52100 --- plasma transferred arc welding --- residual stress --- scanning acoustic microscopy --- hybrid components --- bevel gears --- hot forging --- process-integrated heat treatment --- air-water spray cooling --- self-tempering --- aluminum-steel compound --- intermetallic phases --- co-extrusion --- nanoindentation --- multi-material --- IZEO --- topology optimization --- computer-aided engineering environment --- GPDA --- manufacturing restrictions --- composites --- HSHPT --- nano multilayers --- Ni-Ti --- SPD --- friction welding --- surface geometry modification

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Fiber-reinforced composite (FRC) materials are widely used in advanced structures and are often applied in order to replace traditional materials such as metal components, especially those used in corrosive environments. They have become essential materials for maintaining and strengthening existing infrastructure due to the fact that they combine low weight and density with high strength, corrosion resistance, and high durability, providing many benefits in performance and durability. Modified fiber-based composites exhibit better mechanical properties, impact resistance, wear resistance, and fire resistance. Therefore, the FRC materials have reached a significant level of applications ranging from aerospace, aviation, and automotive systems to industrial, civil engineering, military, biomedical, marine facilities, and renewable energy. In order to update the field of design and development of composites with the use of organic or inorganic fibers, a Special Issue entitled “Progress of Fiber-Reinforced Composites: Design and Applications” has been introduced. This reprint gathers and reviews the collection of twelve article contributions, with authors from Europe, Asia and America accepted for publication in the aforementioned Special Issue of Applied Sciences.

Technology: general issues --- fiber-cement-treated subgrade soil --- mechanical properties --- triaxial test --- brittleness index --- failure angle --- carbon fibers --- lignin --- melt spinning --- carbonization --- Raman --- micro-CT --- banana fiber --- impact response --- compression after impact --- natural fiber --- compression shear properties --- bonded–bolted hybrid --- C/C composites --- high temperature --- hybrid structures --- metallic/composite joints --- plasticity --- damage propagation --- FEM --- crashworthiness --- finite element analysis (FEA) --- composites --- progressive failure analysis (PFA) --- cyclic hygrothermal aging --- high strain rates --- braided composites --- compressive property --- basalt fiber-reinforced polymer (BFRP) --- thickness --- durability --- hygrothermal ageing --- accelerated ageing method --- GFRP composite structures --- slip-critical connection --- stainless-steel cover plates --- surface treatment --- prevailing torque --- anchor --- shear behavior --- concrete edge breakout resistance --- ultimate flexural strength --- energy absorption capacity --- steel fiber --- multi-material design --- thermoplastic composites --- joining --- resistance spot welding --- metal inserts --- tubular composites --- finite element analysis --- computational fluid dynamics --- wireless communication --- signal attenuation --- n/a --- bonded-bolted hybrid

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In recent years, the requirements for technical components have steadily been increasing. This development is intensified by the desire for products with a lower weight, smaller size, and extended functionality, but also with a higher resistance against specific stresses. Mono-material components, which are produced by established processes, feature limited properties according to their respective material characteristics. Thus, a significant increase in production quality and efficiency can only be reached by combining different materials in a hybrid metal component. In this way, components with tailored properties can be manufactured that meet the locally varying requirements. Through the local use of different materials within a component, for example, the weight or the use of expensive alloying elements can be reduced. The aim of this Special Issue is to cover the recent progress and new developments regarding all aspects of hybrid bulk metal components. This includes fundamental questions regarding the joining, forming, finishing, simulation, and testing of hybrid metal parts.

tailored forming --- bulk metal forming --- geometry measurement --- wrought-hot objects --- turning --- process monitoring --- feeling machine --- benchmark --- lateral angular co-extrusion --- mechanical behavior --- hybrid metal components --- ultrasound --- laser beam welding --- excitation methods --- melt pool dynamics --- nickel base alloy 2.4856 --- membrane mode enhanced cohesive zone elements --- damage --- joining zone --- cross-wedge rolling --- welding --- PTA --- LMD-W --- forming --- rolling --- coating --- hybrid bearing --- residual stresses --- X-ray diffraction --- rolling contact fatigue --- bearing fatigue life --- AISI 52100 --- plasma transferred arc welding --- residual stress --- scanning acoustic microscopy --- hybrid components --- bevel gears --- hot forging --- process-integrated heat treatment --- air-water spray cooling --- self-tempering --- aluminum-steel compound --- intermetallic phases --- co-extrusion --- nanoindentation --- multi-material --- IZEO --- topology optimization --- computer-aided engineering environment --- GPDA --- manufacturing restrictions --- composites --- HSHPT --- nano multilayers --- Ni-Ti --- SPD --- friction welding --- surface geometry modification