Critical evaluation of the pulsed selective laser melting process when fabricating Ti64 parts using a range of particle size distributions

Alfaify, Abdullah; Hughes, James; Ridgway, Keith

doi:10.1016/j.addma.2017.12.003

Cited by 21 publications

(12 citation statements)

References 18 publications

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“…Additive manufacturing (AM) is a particularly attractive path to reducing the high cost [3] of conventional wrought Ti parts, which are frequently associated with high buy-to-fly ratios [4]. There are a variety of AM technologies [5] which have been applied to Ti-6Al-4V (Ti64), the most common Ti alloy used in aerospace, [6][7][8]. High deposition rate wire-fed methods, like Wire-Arc Additive Manufacturing (WAAM), are particularly suited for the production of airframe parts because of their ability to efficiently produce larger-scale components which are meters in length [9].…”

Section: Introductionmentioning

confidence: 99%

The potential for grain refinement of Wire-Arc Additive Manufactured (WAAM) Ti-6Al-4V by ZrN and TiN inoculation

Kennedy

Davis

Caballero

et al. 2021

Additive Manufacturing

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Section: Introductionmentioning

confidence: 99%

The potential for grain refinement of Wire-Arc Additive Manufactured (WAAM) Ti-6Al-4V by ZrN and TiN inoculation

Kennedy

Davis

Caballero

et al. 2021

Additive Manufacturing

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“…The surface roughness of as-received and laser polished samples of Ti6Al4V and TC11 alloys were also compared, respectively [13]. Moreover, researches have reported on the relationship between the sample quality and the process parameters as laser power, exposure time, point distance, particle size, layer thickness and hatching distance during SLM [14,15,16]. The effect of six different kinds of scan patterns on microstructure and mechanical properties has been investigated [17].…”

Section: Introductionmentioning

confidence: 99%

The Martensitic Transformation and Mechanical Properties of Ti6Al4V Prepared via Selective Laser Melting

Jiang

et al. 2019

Materials

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This article investigated the microstructure of Ti6Al4V that was fabricated via selective laser melting; specifically, the mechanism of martensitic transformation and relationship among parent β phase, martensite (α’) and newly generated β phase that formed in the present experiments were elucidated. The primary X-ray diffraction (XRD), transmission electron microscopy (TEM) and tensile test were combined to discuss the relationship between α’, β phase and mechanical properties. The average width of each coarse β columnar grain is 80–160 μm, which is in agreement with the width of a laser scanning track. The result revealed a further relationship between β columnar grain and laser scanning track. Additionally, the high dislocation density, stacking faults and the typical (10true1¯1) twinning were identified in the as-built sample. The twinning was filled with many dislocation lines that exhibited apparent slip systems of climbing and cross-slip. Moreover, the α + β phase with fine dislocation lines and residual twinning were observed in the stress relieving sample. Furthermore, both as-built and stress-relieved samples had a better homogeneous density and finer grains in the center area than in the edge area, displaying good mechanical properties by Feature-Scan. The α’ phase resulted in the improvement of tensile strength and hardness and decrease of plasticity, while the newly generated β phase resulted in a decrease of strength and enhancement of plasticity. The poor plasticity was ascribed to the different print mode, remained support structures and large thermal stresses.

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“…The problem is related to the impossibility of directly increasing the laser power without a decrease in the quality of the manufactured objects [27][28][29][30]. The direct augmentation of the main SLM parameters leads to an unpredictable and dramatic decrease of the product quality, which is traditionally associated with an excess of energy in the molten pool.…”

Section: Introductionmentioning

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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Critical evaluation of the pulsed selective laser melting process when fabricating Ti64 parts using a range of particle size distributions

Cited by 21 publications

References 18 publications

The potential for grain refinement of Wire-Arc Additive Manufactured (WAAM) Ti-6Al-4V by ZrN and TiN inoculation

The potential for grain refinement of Wire-Arc Additive Manufactured (WAAM) Ti-6Al-4V by ZrN and TiN inoculation

The Martensitic Transformation and Mechanical Properties of Ti6Al4V Prepared via Selective Laser Melting

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

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