Support optimization for overhanging parts in direct metal laser sintering

Oter, Zafer Cagatay; Coşkun, Mert; Akça, Yaşar; Sürmen, Ömer; Yılmaz, Mustafa Safa; Özer, Gökhan; Tarakçı, Gürkan; Khan, Hamaid Mahmood; Koç, Ebubekir

doi:10.1016/j.ijleo.2018.12.072

Cited by 29 publications

(14 citation statements)

References 22 publications

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“…The optimisation of the parameters required for the SLM fabrication of dense parts is of paramount importance to achieve good mechanical properties. There are several studies on the optimisation of the SLM processes with regard to fabricating various materials (Oter et al , 2019; Yap et al , 2016; Liu et al , 2015; Du et al , 2016; Han et al , 2017; Jhabvala et al , 2010; Jue et al , 2017). German (1998) reported that the shape, size, spacing as well as the location of the pores significantly influenced the ductility of a material.…”

Section: Introductionmentioning

confidence: 99%

Effect of nAl₂O₃ on the part density and microstructure during the laser-based powder bed fusion of AlSi₁₀Mg composite

Chen

Tan

et al. 2020

RPJ

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Purpose In recent years, additive manufacturing techniques have attracted much research attention because of their ability to fabricate customised parts with complex geometry. The range of composites suitable for laser-based powder bed fusion technique is limited, and has not been investigated yet. This paper aims to study the fabrication of AlSi10Mg reinforced with nAl2O3 using the laser-based powder bed fusion technique. Design/methodology/approach An experimental approach was used to investigate the densification of AlSi10Mg–nAl2O3 composites using laser-based powder bed fusion technique. Optimisation of the porosity was performed, and microstructure evolution was evaluated. Findings In this study, laser volumetric energy density (approximately 109 J/mm3) was found to be required for the fabrication of AlSi10Mg–nAl2O3 composites with a relative volumetric density approximating 99%. The use of laser volumetric energy density resulted in larger grains. Columnar grain structure was observed via the use of electron backscatter diffraction mapping. Originality/value This paper examines the processing of new aluminium composite material suitable for the fabrication via the laser-based powder bed fusion technique.

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Section: Introductionmentioning

confidence: 99%

Effect of nAl₂O₃ on the part density and microstructure during the laser-based powder bed fusion of AlSi₁₀Mg composite

Chen

Tan

et al. 2020

RPJ

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“…DMLS is an AM technology for the layer‐by‐layer production of metallic parts and semifinished products directly from the CAD models via laser sintering of metal powders . This method has superior features compared to conventional casting such as the ability to easily produce highly complex geometric parts and end products, reduction of expensive tooling, reduction of the amount of material waste by using only the required raw material, and product fabrication at a lower cost within a few hours …”

Section: Introductionmentioning

confidence: 99%

Investigation of the effects of different heat treatment parameters on the corrosion and mechanical properties of the AlSi10Mg alloy produced with direct metal laser sintering

Özer

Tarakçı

Yılmaz

et al. 2019

Materials & Corrosion

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In this study, AlSi10Mg samples produced by the direct metal laser sintering (DMLS) method were applied to heat treatment with different parameters (stress relief and T6). Heat‐treated and as‐built samples were subjected to intergranular corrosion test according to BS EN ISO 11846 standard. Hardness, tensile, electrical conductivity, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, and weight loss tests were applied to the samples. The corrosion, electrical conductivity, and mechanical properties of the DMLS‐AlSi10Mg material were investigated in detail depending on the heat‐treatment parameters.

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“…The uncertainties in powder granulometry within the build chamber, such as powder size, shape, distribution, and powder packing density, can significantly alter final mechanical and surface properties, hindering parts' repeatability and product quality [5,14,15]. Moreover, the processing conditions such as the scanning location, geometry type, and atmospheric conditions can alter the final mechanical properties of the SLM components [16,17]. Therefore, the mechanical properties of SLM components fabricated with identical laser parameters can still have different surface roughness, density, and mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

Weibull distribution of selective laser melted AlSi10Mg parts for compression testing

Khan¹,

Dirikolu²,

Koç³

2021

J Adv Manuf Eng

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Selective laser melting (SLM) is an additive manufacturing process to fabricate three-dimen- sional structures by fusing powder particles using a computer-guided laser source. The SLM process can produce lightweight bespoke designs, having high strength comparable to con- ventional components. However, the developed surface texture and some of the mechanical properties are still sub-standard compared to the conventional components. The process un- certainty can produce inconsistency in parts’ properties, even those prepared concurrently, affecting SLM parts' repeatability and quality. Therefore, designing applications based on the most probable outcome of the desired properties can embrace process uncertainty. Weibull distribution is a statistical-based probability distribution method that measures the likelihood of the values’ occurrence of any random variable falling in a specific set of values. In this study, the Weibull distribution measured the relative likelihood (90% probability) of the compressive yield, and ultimate strength of the SLM prepared AlSi10Mg samples in a given 22 random sample size. The results showed that the compressive yield and ultimate strength fall between 321 MPa to 382 MPa and 665 MPa to 883 MPa.

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Support optimization for overhanging parts in direct metal laser sintering

Cited by 29 publications

References 22 publications

Effect of nAl₂O₃ on the part density and microstructure during the laser-based powder bed fusion of AlSi₁₀Mg composite

Effect of nAl₂O₃ on the part density and microstructure during the laser-based powder bed fusion of AlSi₁₀Mg composite

Investigation of the effects of different heat treatment parameters on the corrosion and mechanical properties of the AlSi10Mg alloy produced with direct metal laser sintering

Weibull distribution of selective laser melted AlSi10Mg parts for compression testing

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Support optimization for overhanging parts in direct metal laser sintering

Cited by 29 publications

References 22 publications

Effect of nAl2O3 on the part density and microstructure during the laser-based powder bed fusion of AlSi10Mg composite

Effect of nAl2O3 on the part density and microstructure during the laser-based powder bed fusion of AlSi10Mg composite

Investigation of the effects of different heat treatment parameters on the corrosion and mechanical properties of the AlSi10Mg alloy produced with direct metal laser sintering

Weibull distribution of selective laser melted AlSi10Mg parts for compression testing

Contact Info

Product

Resources

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Effect of nAl₂O₃ on the part density and microstructure during the laser-based powder bed fusion of AlSi₁₀Mg composite

Effect of nAl₂O₃ on the part density and microstructure during the laser-based powder bed fusion of AlSi₁₀Mg composite