Tensile Properties Characterization of AlSi10Mg Parts Produced by Direct Metal Laser Sintering via Nested Effects Modeling

Palumbo, Biagio; Re, Francesco Del; Martorelli, Massimo; Lanzotti, Antonio; Corrado, Pasquale

doi:10.3390/ma10020144

Cited by 30 publications

(12 citation statements)

References 30 publications

(30 reference statements)

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“…This allowed us to conduct a high-resolution full factorial DOE. Other experimental approaches include surface response methods (SRM) [48] and nested effects modelling (NEM) techniques [49] which allow more independent variables in the study (e.g. varying condition for layer thickness, hatching strategies and hatching island size) at the cost of experimental resolution.…”

Section: Design Of Experiments For the Pbfmentioning

confidence: 99%

Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion

Nilsén

Ituarte

Salmi

et al. 2019

Additive Manufacturing

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Increasingly, metal parts made by additive manufacturing are produced using powder bed fusion (PBF). In this paper we report upon the combined effects of PBF parameters, including power and scan speed, in layer-by-layer manufacturing of gas atomized non-modulated (NM) Ni-Mn-Ga alloy. The effects of process parameters upon PBF is studied by applying nine different parameter sets in the as-printed state and after homogenization and ordering. The chemical composition of the samples is analyzed using EDX attached to an SEM, and the crystal structures are determined by X-ray diffraction. The phase transformation temperatures are measured using a low-field ac susceptibility measurement system and the magnetic properties are measured with a vibrating sample magnetometer (VSM). Before the heat-treatment, all as-printed samples showed paramagnetic behavior with low magnetization and no phase transformations could be observed in the susceptibility measurements. After annealing, the samples recovered the ferromagnetic behavior with comparable magnetization to annealed gas atomized powder. The as-printed samples were composed of a mixture of different crystal structures. However, after annealing the original NM structure with a = b = 5.47 Å and c = 6.66 Å with a c/a-ratio of 1.22 was recovered and crystallographic twins could be observed in an SEM.

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Section: Design Of Experiments For the Pbfmentioning

confidence: 99%

Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion

Nilsén

Ituarte

Salmi

et al. 2019

Additive Manufacturing

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“…perpendicular to the building direction). Palumbo et al [16] employed a nested effects modelling technique to investigate the effect of different laser exposure strategies on the physical and mechanical properties of AlSi10Mg fabricated by direct metal laser sintering. Del Re et al [17] used one-way analysis of variance to assess the effect of powder reuse on the mechanical properties and surface quality of AlSi10Mg parts.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat treatment and laser surface remelting on AlSi10Mg alloy fabricated by selective laser melting

Han

Jiao

2019

Int J Adv Manuf Technol

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The selective laser melting (SLM) of aluminium alloys is of interest to researchers because of these alloys' potential applications in the aerospace and automotive domains. Post-processing is generally required in order to enhance the mechanical properties of devices that involve moving parts, where surface mechanical properties are significant factors. This paper describes a preliminary study that was conducted to investigate the effect of post-processing on the microstructure and mechanical properties of SLM fabricated AlSi10Mg alloy, with an emphasis on the laser surface remelting (LSR) process. The experimental results demonstrate that the heat treatment degraded tensile strength while improving ductility by achieving grain growth and residual stress release. The yield strength obtained in the experiment was reduced from 200 to 100 MPa, whereas the elongation increased from 6 to 22%. The LSR process was found to contribute to an improvement in surface finish. The surface roughness indicator R a was determined to be 0.93 μm in the LSR post-processed sample, compared to a fairly high value of 19.3 μm in the as-fabricated samples. The LSR process also enhanced the microhardness by refining the microstructure; the Si eutectic dendritic structure that formed was found to be finer than that of the as-fabricated samples. Compared to the as-fabricated samples, the LSR process contributed to a 19.5% increase in microhardness. The findings suggest that the microstructure and mechanical properties of SLM-fabricated AlSi10Mg parts could be tailored by suitable post-processing such as heat treatment and LSR. The significance of this research is its proposal of a novel technique to enhance surface hardness using LSR, which is a significant step towards the combination of SLM and LSR processes to manufacture customised aluminium components for the automotive and aerospace sectors.

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“…The most popular process for metal AM is laser beam melting (LBM), also known as selective laser melting (SLM), direct metal laser sintering (DMLS), and industrial three‐dimensional printing . 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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Tensile Properties Characterization of AlSi10Mg Parts Produced by Direct Metal Laser Sintering via Nested Effects Modeling

Cited by 30 publications

References 30 publications

Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion

Effect of process parameters on non-modulated Ni-Mn-Ga alloy manufactured using powder bed fusion

Effect of heat treatment and laser surface remelting on AlSi10Mg alloy fabricated by selective laser melting

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

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