Fracture Toughness of Hybrid Components with Selective Laser Melting 18Ni300 Steel Parts

Santos, L.M.S.; Jesús, Joel De; Ferreira, J.A.M.; Costa, J.D.; Capela, C.

doi:10.3390/app8101879

Cited by 20 publications

(11 citation statements)

References 23 publications

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“…The energy of the laser beam reaching the surface of the powder carries radiation pressure and radiation heat, which partly absorbed by the surface of the powder and partly reflected into the environment [87]. The simple Gaussian profile of the laser beam creates overheating in the center of the molten pool and consequently large temperature gradients between the center and its periphery.…”

Section: Discussion On Results Of Video Monitoringmentioning

confidence: 99%

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

et al. 2018

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Problems with the laser additive manufacturing of metal parts related to its low efficiency are known to hamper its development and application. The method of selective laser melting of metallic powders can be improved by the installation of an additional laser beam modulator. This allows one to control the power density distribution optically in the laser beam, which can influence the character of heat and mass transfer in a molten pool during processing. The modulator contributes alternative modes of laser beam: Gaussian, flat top (top hat), and donut (bagel). The study of its influence includes a mathematical description and theoretical characterization of the modes, high-speed video monitoring and optical diagnostics, characterization of processing and the physical phenomena of selective laser melting, geometric characterization of single tracks, optical microscopy, and a discussion of the obtained dependences of the main selective laser melting (SLM) parameters and the field of its optimization. The single tracks were produced using the advanced technique of porosity lowering. The parameters of the obtained samples are presented in the form of 3D graphs. The further outlook and advanced applications are discussed.

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Section: Discussion On Results Of Video Monitoringmentioning

confidence: 99%

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

et al. 2018

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“…Hybrid parts manufactured by selective laser melting designed to produce parts from a single material. Hybrid parts manufactured by selective laser melting were investigated [12]. The concept of multi-material fabrication by SLM has been reported in the literature [8][9]; however, these products were printed by physically mixing powders before layering.…”

Section: Introductionmentioning

confidence: 99%

Applying Selective Laser Melting to Join Al and Fe: An Investigation of Dissimilar Materials

2019

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Combining aluminum and steel is a major goal of automobile manufacturers and other industries because the hybrid material reduces the weight of components. However, differences in chemical properties, thermal expansion, and physical characteristics of aluminum and steel are barriers to achieving this goal. In this article, selective laser melting (SLM), which is widely used in industrial fields, was applied to join dissimilar materials by printing aluminum on a steel substrate. Defects of joining during the SLM process, characteristics of the intermetallic reaction layer, and the effects of the process parameters were investigated. The analysis indicates that flake behavior could affect the quality of joining. The phases of the intermetallic layer found in this study were in agreement with other research, but the morphology of the layer was much different. A formula to estimate the join quality in terms of density energy is proposed. The results indicate that the SLM process is a promising method to manufacture a hybrid material.

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“…SLM has demonstrated its potential for manufacturing mesh structure with the desired dimensions. The formation of a mesh pattern has a strong potential to increase the functionality and costeffectiveness of the SLM process [41]. In this study, the fabrication of a metal mesh using SLM has been investigated as a fast and easy process with a tailored dimensional accuracy.…”

Section: Materials and Process Characterizationmentioning

confidence: 99%

Fabrication of Mesh Patterns Using a Selective Laser-Melting Process

et al. 2019

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The selective laser-melting (SLM) process can be applied to the additive building of complex metal parts using melting metal powder with laser scanning. A metal mesh is a common type of metal screen consisting of parallel rows and intersecting columns. It is widely used in the agricultural, industrial, transportation, and machine protection sectors. This study investigated the fabrication of parts containing a mesh pattern from the SLM of AISI 304 stainless steel powder. The formation of a mesh pattern has a strong potential to increase the functionality and cost-effectiveness of the SLM process. To fabricate a single-layered thin mesh pattern, laser layering has been conducted on a copper base plate. The high thermal conductivity of copper allows heat to pass through it quickly, and prevents the adhesion of a thin laser-melted layer. The effects of the process conditions such as the laser scan speed and scanning path on the size and dimensional accuracy of the fabricated mesh patterns were characterized. As the analysis results indicate, a part with a mesh pattern was successfully obtained, and the application of the proposed method was shown to be feasible with a high degree of reliability.

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Fracture Toughness of Hybrid Components with Selective Laser Melting 18Ni300 Steel Parts

Cited by 20 publications

References 23 publications

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

Power Density Distribution for Laser Additive Manufacturing (SLM): Potential, Fundamentals and Advanced Applications

Applying Selective Laser Melting to Join Al and Fe: An Investigation of Dissimilar Materials

Fabrication of Mesh Patterns Using a Selective Laser-Melting Process

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