Additive Manufacturing of Al Alloys and Aluminium Matrix Composites (AMCs)

Manfredi, Diego; Calignano, Flaviana; Krishnan, Manickavasagam; Canali, Riccardo; Ambrosio, Elisa Paola; Biamino, Sara; Ugues, Daniele; Pavese, Matteo; Fino, Paolo

doi:10.5772/58534

Cited by 111 publications

(93 citation statements)

References 57 publications

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“…[40,41] From there on, improvements were made on both sides, that is, the raw material and the laser source, leading to metal powder mixtures with a low and high melting metal or alloy. [8,33,44,45] Given the fact that these entire enhancements were made within a short period of time and by modifying existing AM machines, the previous "older" nomenclatures were still applied. [42,43] On the other side, the availability of improved lasers led to the possibility to fully melt the raw metal powder, rendering the addition of binding media partially obsolete.…”

Section: Nomenclaturementioning

confidence: 99%

“…Independent of the approach used to scan the crosssections, representing the crayoning of the core itself, all approaches have in common that the cross-section's boundary, the contour, is irradiated separately. [44,55] After finishing the exposure of one single layer, the substrate plate is lowered and a new powder layer is added on top by an inbuilt recoater system. [64] Due to the dispersion effects of the irradiation, caused by the interaction of the laser beam with the powder particles and the existing scan tracks, a widening of the affected zone occurs.…”

Section: Manufacture Schematamentioning

confidence: 99%

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A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

et al. 2018

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Additive manufacturing has multiple advantages over conventional fabrication techniques, such as the geometrical freedom and, to a great extent, the omission of tooling equipment. Hence, futuristic designs and non-standard topology-optimized structures can be fabricated without causing noteworthy extra cost, since the geometrical complexity is, exaggeratedly spoken, for free. The manufacturing time and the amount of required raw material are the key criteria, which determine the expenses. What at first glance appears as an engineer's dream, introduces its complexity in the description of the material's characteristics and their volatility to the manufacturing conditions. Within this study, the main properties (i.e., surface hardness, tensile, and compression strength, as well as fracture toughness) and their anisotropic and inhomogeneous nature are addressed. Detailed overviews of the progress to date for aluminum, iron, titanium, cobalt, and nickel based raw materials are provided. Furthermore, an overview about the state-of-the-art in the medical sector is included, comprising the areas of utilization and several trail studies.

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Section: Nomenclaturementioning

confidence: 99%

Section: Manufacture Schematamentioning

confidence: 99%

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

et al. 2018

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“…Additive manufacturing (AM) technology has gained increased attention in the last decade due to its potential to produce complex net shape structures with small tolerances, attractive cost, and a relatively short time to market [1,2]. The selective laser melting (SLM) process is part of this technology which employs a high energy laser beam to selectively melt a powder bed metal layer-by-layer according to predesigned CAD software [3,4].…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of AlSi10Mg Alloy Produced by Additive Manufacturing (AM) vs. Its Counterpart Gravity Cast Alloy

Leon

Shirizly

Aghion

2016

Metals

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Abstract:The attractiveness of additive manufacturing (AM) relates to the ability of this technology to rapidly produce very complex components at affordable costs. However, the properties and corrosion behavior, in particular, of products produced by AM technology should at least match the properties obtained by conventional technologies. The present study aims at evaluating the corrosion behavior and corrosion fatigue endurance of AlSi10Mg alloy produced by selective laser melting (SLM) in comparison with its conventional counterpart, gravity cast alloy. The results obtained indicate that the corrosion resistance of the printed and cast alloys was relatively similar, with a minor advantage to the printed alloy. The corrosion fatigue endurance of the printed alloy was relatively improved compared to the cast alloy. This was mainly attributed to the significant differences between the microstructure and defect characteristics of those two alloys.

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“…In Table 1 are summarized the parameters optimized starting from the above described AlSi10Mg powders. In all cases, the scanning strategy adopted is based on the laser exposure in stripes of 5 mm of the samples section and in their rotation of 67° between subsequent layers, which ensures to achieve the highest density [11]. With such parameters, cubic samples of 15mm per side were built for density measurements, microstructure observations by optical and electron microscopy (FESEM), and Vickers microhardness.…”

Section: Process Parameters and Scan Strategymentioning

confidence: 99%

“…The platform represents the metallic substrate used to give mechanical and thermal sustenance during the manufacturing of the parts. Considering then the proper manufacturing step, it is fundamental to correlate the starting powders size and shape to the main process parameters, like laser power, scanning speed, layer thickness, hatching distance, and to the scanning strategy adopted [11]. This strategy differs depending on the L-PBF machine supplier, but in all cases the re-melting of the previous layers during the fusing of the current layer exposed allows its complete adherence to the rest of the part and a high final density.…”

Section: Introductionmentioning

confidence: 99%

Laser Powder Bed Fusion of Aluminum Alloys

Manfredi¹,

Bidulský²

2017

Acta Metall Slovaca

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The aim of this study is to analyze and to summarize the results of the processing of aluminum alloys, and in particular of the Al-Si-Mg alloys, by means of the Additive Manufacturing (AM) technique defined as Laser Powder Bed Fusion (L-PBF). This process is gaining interest worldwide thanks to the possibility of obtaining a freeform fabrication coupled with high mechanical strength and hardness related to a very fine microstructure. L-PBF is very complex from a physical point of view, due to the extremely rapid interaction between a concentrated laser source and micrometric metallic powders. This generate very fast melting and subsequent solidification on each layer and on the previously consolidated substrate. The effects of the main process variables on the microstructure and mechanical properties of the final parts are analyzed: from the starting powder properties, such as shape and powder size distribution, to the main process parameters, such as laser power, scanning speed and scanning strategy. Furthermore, some examples of applications for the AlSi10Mg alloy are illustrated.

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Additive Manufacturing of Al Alloys and Aluminium Matrix Composites (AMCs)

Cited by 111 publications

References 57 publications

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

A Review of Metal Fabricated with Laser‐ and Powder‐Bed Based Additive Manufacturing Techniques: Process, Nomenclature, Materials, Achievable Properties, and its Utilization in the Medical Sector

Corrosion Behavior of AlSi10Mg Alloy Produced by Additive Manufacturing (AM) vs. Its Counterpart Gravity Cast Alloy

Laser Powder Bed Fusion of Aluminum Alloys

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