Metal Fabrication by Additive Manufacturing Using Laser and Electron Beam Melting Technologies

Murr, L. E.; Gaytan, Sara M.; Ramirez, D. A.; Martínez, E.; Hernandez, Jennifer; Amato, Krista; Shindo, P. W.; Medina, Francisco; Wicker, Ryan B.

doi:10.1016/s1005-0302(12)60016-4

Cited by 1,292 publications

(465 citation statements)

References 18 publications

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“…Spherical and near-spherical grains have been found (Fig. 2); thus, efficient flowing and layer packaging are expected to result in uniform melting [35].…”

Section: Composition and Constructionmentioning

confidence: 99%

Laser powder-bed fusion of Inconel 718 to manufacture turbine blades

Caiazzo

Alfieri

Corrado

et al. 2017

Int J Adv Manuf Technol

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In the frame of additive manufacturing of metals, laser powder-bed fusion is investigated in this paper as an advanced industrial prototyping tool to manufacture Inconel 718 turbine blades at a predesign stage before flow production. Expediting of the evaluation of any upgrade to the part is aimed. To this purpose, possible anisotropy of manufacturing is preliminarily investigated via tensile testing at room and elevated temperature as a function of the sloping angle with the building plate; the normalized strength is given and compared with similar studies in the literature. Positioning and proper supporting in manufacturing are discussed; the parts are further investigated to assess their compliance with the intended nominal geometry.

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“…Spherical and near-spherical grains have been found (Fig. 2); thus, efficient flowing and layer packaging are expected to result in uniform melting [35].…”

Section: Composition and Constructionmentioning

confidence: 99%

Laser powder-bed fusion of Inconel 718 to manufacture turbine blades

Caiazzo

Alfieri

Corrado

et al. 2017

Int J Adv Manuf Technol

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“…Extensive research has been conducted on various additive manufactured metallic materials, 2,26,40 and dramatically different microstructures were observed compared to conventionally manufactured materials.…”

Section: Properties and Performance Of Additive Manufactured Materialsmentioning

confidence: 99%

Additive Manufacturing: Making Imagination the Major Limitation

Zhai

Lados

LaGoy³

2014

JOM

234

125

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Additive manufacturing (AM) refers to an advanced technology used for the fabrication of three-dimensional near-net-shaped functional components directly from computer models, using unit materials. The fundamentals and working principle of AM offer several advantages, including near-net-shape capabilities, superior design and geometrical flexibility, innovative multimaterial fabrication, reduced tooling and fixturing, shorter cycle time for design and manufacturing, instant local production at a global scale, and material, energy, and cost efficiency. Well suiting the requests of modern manufacturing climate, AM is viewed as the new industrial revolution, making its way into a continuously increasing number of industries, such as aerospace, defense, automotive, medical, architecture, art, jewelry, and food. This overview was created to relate the historical evolution of the AM technology to its state-of-the-art developments and emerging applications. Generic thoughts on the microstructural characteristics, properties, and performance of AM-fabricated materials will also be discussed, primarily related to metallic materials. This write-up will introduce the general reader to specifics of the AM field vis-à-vis advantages and common techniques, materials and properties, current applications, and future opportunities.

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“…Concerning powder based AM processes, there are still challenges to overcome like low build-up rates and a high anisotropy in mechanical proporties [2][3][4]. The build-up rate depends strongly on the deflection speed of the used heating source.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the grain structure of IN718 during selective electron beam melting

Körner

Helmer

Bauereiß

et al. 2014

MATEC Web of Conferences

109

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Abstract. Selective electron beam melting (SEBM) is an additive manufacturing method where complex parts are built from metal powders in layers of about 50 µm. SEBM works under vacuum conditions which results in a perfect protection of the metal alloy. The electron beam is used for heating (about 900 • C building temperature) and selective melting. The high beam velocities allow innovative scanning strategies in order to adapt the local solidification conditions which determine the epitaxial solidification process of IN718. We show how scanning strategies can be used either to produce a columnar grain structure with a high texture in building direction or a complete texture-free fine grained structure. Numerical simulations of the selective melting process are applied to reveal the fundamental mechanisms responsible for the completely different grain structures. In addition the influence of the different grain structures on the mechanical properties of IN718 is briefly discussed.

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Metal Fabrication by Additive Manufacturing Using Laser and Electron Beam Melting Technologies

Cited by 1,292 publications

References 18 publications

Laser powder-bed fusion of Inconel 718 to manufacture turbine blades

Laser powder-bed fusion of Inconel 718 to manufacture turbine blades

Additive Manufacturing: Making Imagination the Major Limitation

Tailoring the grain structure of IN718 during selective electron beam melting

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