Producing titanium aerospace components from powder using laser forming

Arcella, F. G.; Froes, F. H.

doi:10.1007/s11837-000-0028-x

Cited by 152 publications

(79 citation statements)

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“…In this regard, AM for metallic materials have a great potential when dealing with high-cost and hard-to-cut materials. For instance, titanium alloys are attractive materials for many components in aerospace industry and more recently, in biomedical applications, such as prostheses and implants [6].…”

Section: Additive Manufacturing Of H11 With Wire-based Laser Metal Dementioning

confidence: 99%

Additive Manufacturing of H11 with Wire-Based Laser Metal Deposition

2017

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Laser additive manufacturing (LAM) is a near-net-shape production technique by which a part can be built up from 3D CAD model data, without material removal. Recently, these production processes gained attention due to the spreading of polymer-based processes in private and commercial applications. However, due to the insufficient development of metal producing processes regarding design, process information and qualification, resistance on producing functional components with this technology is still present. To overcome this restriction further studies have to be undertaken. The present research proposes a parametric study of additive manufacturing of hot work tool steel, H11. The selected LAM process is wire-based laser metal deposition (LMD-W). The study consists of parameters optimization for single beads (laser power, travel speed and wire feed rate) as well as lateral and vertical overlap for layer-by-layer technique involved in LMD process. Results show that selection of an ideal set of parameters affects substantially the surface quality, bead uniformity and bond between substrate and clad. Discussion includes the role of overlapping on the soundness of parts based on the height homogeneity of each layer, porosity and the presence of gaps. For the conditions tested it was shown that once the deposition parameters are selected, lateral and vertical overlapping determines the integrity and quality of parts processed by LAM. Key-words:Laser additive manufacturing; Hot work tool steel; Parametric study; LMD-W. Manufatura Aditiva do Aço Ferramenta H11 por Deposição Metálica de Arame a LaserResumo: Manufatura aditiva a laser é uma técnica de produção por camadas na qual uma peça pode ser produzida a partir de um modelo 3D sem remoção de material. Recentemente, esses processos ganharam atenção devido à disseminação de processos com polímeros em aplicações privadas e comerciais. Entretanto, devido ao desenvolvimento insuficiente da manufatura aditiva com metais há uma resistência na produção de componentes funcionais com esta tecnologia. Portanto, para superar essa limitação, o presente artigo propõe um estudo nos parâmetros de processo de deposição metálica de arame a laser (LMD-W) do aço ferramenta para trabalho a quente, H11. O estudo consiste na otimização de parâmetros para cordões individuais (potência do laser, velocidade de deslocamento e de alimentação do arame), bem como sobreposição lateral e vertical para a técnica de camada por camada envolvida no processo. Os resultados mostram que a seleção de um conjunto ideal de parâmetros afeta substancialmente a qualidade superficial, a uniformidade dos cordões e a aderência entre o substrato e o cordão. A discussão ainda inclui a função da sobreposição na estabilidade do processo em relação à homogeneidade da altura de cada camada, porosidade e presença de falhas. Foi comprovado que após a seleção dos parâmetros de deposição, a sobreposição lateral e vertical determina a integridade e qualidade das peças manufaturadas aditivamente. Palavras-chave:M...

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Section: Additive Manufacturing Of H11 With Wire-based Laser Metal Dementioning

confidence: 99%

Additive Manufacturing of H11 with Wire-Based Laser Metal Deposition

2017

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“…Recent studies have been shown that additive manufacturing (AM) technologies could represent sustainable production routes for metals and, in particular, precious metals such as titanium alloys [1,2]. There are several advantages related to the production of titanium components by AM.…”

Section: Introductionmentioning

confidence: 99%

Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V

Simonelli

Tse

Tuck

2014

Materials Science and Engineering: A

807

288

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originates from the AM process. To understand the effect of the microstructure on the tensile properties, selective laser melted (SLM) Ti-6Al-4V samples built in three different orientations were tensile tested. The investigated samples were near fully dense, in two distinct conditions, as-built and stress relieved respectively. It was found that the build orientation affects the tensile properties, and in particular the ductility of the samples. The mechanical anisotropy of the parts was discussed in relation to the crystallographic texture, phase composition and the predominant fracture mechanisms. Fractography and electron backscatter diffraction (EBSD) results indicate that the predominant fracture mechanism is 2 intergranular fracture along the grain boundaries present and thus provide and explanation for the typical fracture surface features observed in fracture AM Ti-6Al-4V.

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“…El proceso de conformado por láser, (laserforming, LAM -'Laser Additive Manufacturing') [56] , está siendo implementado por la empresa Aeromet para la fabricación de ciertos componentes estructurales en colaboración con Boeing y el ejército de los EEUU. Esta tecnología no puede enmarcarse dentro de la pulvimetalurgia convencional, y las piezas producidas necesitan un proceso de mecanizado tras el conformado con láser.…”

Section: Conformado Por Láser (Laserforming)unclassified

“…Se han realizado materiales compuestos de titanio, con refuerzo de TiB, obteniendo resistencias, módulos de elasticidad y resistencias al desgaste que hacen al titanio apto para ser empleado en aplicaciones de automoción [43] . Sin embargo, las propiedades de los materiales obtenidos, en particular la resistencia a fatiga, son considerablemente inferiores a las de los materiales producidos por forja, debido fundamentalmente a la porosidad residual de los materiales pulvimetalúrgi-cos. Por tanto estos materiales posiblemente no sean aptos para aplicaciones donde se exija una alta Figura 4. esquema del procesado por conformado láser (Laser forming) [56] . fiabilidad, a no ser que se realicen etapas de procesado secundario que eliminen la porosidad, lo que encarece notablemente el producto final.…”

Section: Futuro Y Expectativas De Los Materiales Basados En Ti Pmunclassified

Introducción al procesado pulvimetalúrgico del titanio

Esteban¹,

Bolzoni²,

Ruiz-Navas³

et al. 2011

REVMETAL

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ResumenEl desarrollo de las nuevas tecnologías de extracción de titanio, que producen titanio elemental directamente en forma de polvo, sitúan a la pulvimetalurgia en un puesto estratégico para la fabricación de componentes de titanio. La disminución de coste del material base, junto a la economía de los procesos pulvimetalúrgicos, hacen más viable la diversificación de la industria del titanio, lo que permitiría alcanzar volúmenes de producción capaces de popularizar el metal y estabilizar su precio. En este trabajo se muestran algunas de las técnicas pulvimetalúrgicas empleadas para la fabricación de componentes de titanio a partir de los dos enfoques clásicos de mezcla de polvos elementales y el uso de polvos prealeados. Se describen entre otras las técnicas de prensado y sinterización convencional o compactación isostática en frío y caliente, que tratan de competir con las técnicas de procesado convencional, y se muestran algunas aplicaciones actuales y potenciales. Palabras claveTitanio; Pulvimetalurgia; Procesado del titanio.

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Producing titanium aerospace components from powder using laser forming

Cited by 152 publications

References 1 publication

Additive Manufacturing of H11 with Wire-Based Laser Metal Deposition

Additive Manufacturing of H11 with Wire-Based Laser Metal Deposition

Effect of the build orientation on the mechanical properties and fracture modes of SLM Ti–6Al–4V

Introducción al procesado pulvimetalúrgico del titanio

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