High Power Selective Laser Melting (HP SLM) of Aluminum Parts

Buchbinder, Damien; Schleifenbaum, Johannes Henrich; Heidrich, Sebastian; Meiners, Wilhelm; Bültmann, Jan

doi:10.1016/j.phpro.2011.03.035

Cited by 580 publications

(263 citation statements)

References 2 publications

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“…In the last decade, selective laser melting and sintering (SLM/SLS) of metal powders evolved as one of the most promising tools for the fabrication of three-dimensional freeform elements with highly sophisticated geometries that cannot be processed with conventional machining methods or casting techniques [1,2]. Nowadays SLM is advanced to the serial production of customized products in a wide range of applications, especially in automotive, aerospace and medicine.…”

Section: Introductionmentioning

confidence: 99%

Selective laser melting of hypereutectic Al-Si40-powder using ultra-short laser pulses

et al. 2017

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We investigate the use of ultra-short laser pulses for the selective melting of Al-Si40-powder to fabricate complex lightweight structures with wall sizes below 100 μm combined with higher tensile strength and lower thermal expansion coefficient in comparison to standard Al-Si alloys. During the cooling process using conventional techniques, large primary silicon particles are formed which impairs the mechanical and thermal properties. We demonstrate that these limitations can be overcome using ultra-short laser pulses enabling the rapid heating and cooling in a non-thermal equilibrium process. We analyze the morphology characteristics and micro-structures of single tracks and thin-walled structures depending on pulse energy, repetition rate and scanning velocity utilizing pulses with a duration of 500 fs at a wavelength of 1030 nm . The possibility to specifically change and optimize the microstructure is shown.

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Section: Introductionmentioning

confidence: 99%

Selective laser melting of hypereutectic Al-Si40-powder using ultra-short laser pulses

et al. 2017

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“…Thus, one might expect that using higher powers, with the accompanying higher laser speeds, might narrow the processing window to achieve near full density. However, there is evidence (see Buchbinder et al (2011)), in experiments on aluminum alloys at 300, 500, 700, and 1000W, that increasing laser power broadens the processing window.…”

Section: Introductionmentioning

confidence: 99%

Density of additively-manufactured, 316L SS parts using laser powder-bed fusion at powers up to 400 W

Kamath

El-Dasher

Gallegos

et al. 2014

Int J Adv Manuf Technol

314

136

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Selective laser melting is a powder-based, additive-manufacturing process where a threedimensional part is produced, layer by layer, by using a high-energy laser beam to fuse the metallic powder particles. A particular challenge in this process is the selection of appropriate process parameters that result in parts with desired properties. In this study, we describe an approach to selecting parameters for high density (>99%) parts using 316L stainless steel. Though there has been significant success in achieving near-full density for 316L parts, this work has been limited to laser powers <225W. We discuss how we can exploit prior knowledge, design of computational experiments using a simple model of laser melting, and single-track experiments to determine the process parameters for use at laser powers up to 400W. Our results show that, at higher power values, there is a large range of scan speeds over which the relative density remains >99%, with the density reducing rapidly at high speeds due to insufficient melting, and less rapidly at low speeds due to the effect of voids created as the process enters keyhole mode.

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“…The surface roughness depends on many factors such as material, powder particle size, layer thickness, laser and scan parameters, scan strategy and surface post-treatment [14]. The surface roughness of a sloping plane depend on the sloping angle because of the stair effect due to the layer wise production.…”

Section: Resultsmentioning

confidence: 99%

Dimensional Accuracy and Surface Roughness Analysis for AlSi10Mg Produced by Selective Laser Melting (SLM)

et al. 2016

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Abstract. Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique that built 3D part in a layer-by-layer method by melting the top surface layer of a powder bed with a high intensity laser according to sliced 3D CAD data. AlSi10Mg alloy is a traditional cast alloy that is broadly used for die-casting process and used in automotive industry due its good mechanical properties. This paper seeks to investigate the requirement SLM in rapid tooling application. The feasibility study is done by examining the surface roughness and dimensional accuracy as compared to the benchmark part produced through the SLM process with constant parameters. The benchmark produced by SLM shows the potential of SLM in a manufacturing application particularly in moulds.

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High Power Selective Laser Melting (HP SLM) of Aluminum Parts

Cited by 580 publications

References 2 publications

Selective laser melting of hypereutectic Al-Si40-powder using ultra-short laser pulses

Selective laser melting of hypereutectic Al-Si40-powder using ultra-short laser pulses

Density of additively-manufactured, 316L SS parts using laser powder-bed fusion at powers up to 400 W

Dimensional Accuracy and Surface Roughness Analysis for AlSi10Mg Produced by Selective Laser Melting (SLM)

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