Additive manufacturing of metallic components – Process, structure and properties

Freedom of design, mass customisation, waste minimisation and the ability to manufacture complex structures, as well as fast prototyping, are the main benefits of additive manufacturing (AM) or 3D printing. A comprehensive review of the main 3D printing methods, materials and their development in trending applications was carried out. In particular, the revolutionary applications of AM in biomedical, aerospace, buildings and protective structures were discussed. The current state of materials development, including metal alloys, polymer composites, ceramics and concrete, was presented. In addition, this paper discussed the main processing challenges with void formation, anisotropic behaviour, the limitation of computer design and layer-by-layer appearance. Overall, this paper gives an overview of 3D printing, including a survey on its benefits and drawbacks as a benchmark for future research and development.

Additive manufacturing (3D printing): A review of materials, methods, applications and challenges

Additive manufacturing of metals

Consolidation phenomena in laser and powder-bed based layered manufacturing

Welding Metallurgy of

This laser special issue has brought together academic scientists, researchers and laser manufacturers for a share of their experiences on recent progress in laser science and technology in the fields of laser materials processing for manufacturing. The papers cover advances in laser materials fabrication and joining of emerging materials, their fabrication and application.

Laser Materials Fabrication and Joining.

Laser ablation is a new, very flexible process for micro-fabrication of micro-moulds and other micro-system devices. This process is suitable for machining difficult-to-machine materials, like ceramics, dielectrics, carbide and hardened steel with excellent productivity and surface. The paper presents the investigation on the material removal rate of aluminium 5754 using a nanosecond Nd:YAG laser with a wavelength of 1064 nm.

Analysis of the Material Removal Rate of Nanosecond Laser Ablation of Aluminium Using a Parallel Hatching Mode

Andrea Caiti (1,2), Giuseppe Casalino (1,3), Andrea Trucco (1,4) (1) ISME – Inter-University Research Centre on Integrated Systems for the Marine Environment – c/o Dibris, University of Genova (2) Research Centre “E. Piaggio” & DII Dept. Information Eng., University of Pisa (3) DIBRIS – Dept. Informatics, Bioengineering, Robotics & Systems Eng., University of Genova (4) DITEN – Dept. Electrical, Electronics, Telecommunication Eng. & Naval Architecture, University of Genova

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Research Initiatives in Europe: Cooperation for Blue Growth

Horizontal Parking Control of Autonomous Underwater Vehicle, FOLOGA

In this paper a set of technological parameters have been studied in order to define a possible laser welding process optimization and relative mechanical properties for Al 2024-T3 and Al 8090-T3 aluminum alloys. Bead-on-plate and butt joint of different thickness were obtained. About these materials there is an increasing interest that is due to their potential industrial applications, their enhanced mechanical properties jointed to the recognized lightness of the aluminum alloys permits to use them in particular in the aeronautical field.For this experimental work, a CO2 laser equipment has been employed using different working parameters and set-up configurations. On the basis of the evaluation of the bead-on-plate test the optimal process conditions were selected and a number of butt joints were made in order to valuate the mechanical properties of these welds.In fact each weld was characterized by metallographic tests as well as hardness and fatigue strength measurements.Finally, on the basis of the obtained results, some final operating technological evaluations and suggestions have been underlined.In this paper a set of technological parameters have been studied in order to define a possible laser welding process optimization and relative mechanical properties for Al 2024-T3 and Al 8090-T3 aluminum alloys. Bead-on-plate and butt joint of different thickness were obtained. About these materials there is an increasing interest that is due to their potential industrial applications, their enhanced mechanical properties jointed to the recognized lightness of the aluminum alloys permits to use them in particular in the aeronautical field.For this experimental work, a CO2 laser equipment has been employed using different working parameters and set-up configurations. On the basis of the evaluation of the bead-on-plate test the optimal process conditions were selected and a number of butt joints were made in order to valuate the mechanical properties of these welds.In fact each weld was characterized by metallographic tests as well as hardness and fatigue strength measurements.Finally, on the basis of the ...

Giuseppe Casalino

Papers

Laser Materials Fabrication and Joining.

Analysis of the Material Removal Rate of Nanosecond Laser Ablation of Aluminium Using a Parallel Hatching Mode

Research Initiatives in Europe: Cooperation for Blue Growth

Horizontal Parking Control of Autonomous Underwater Vehicle, FOLOGA

On CO2 laser welding of Al 2024-T3 and Al 8090-T3 aluminium alloys butt joints