Effect of Selective Laser Melting Process Parameters on the Quality of Al Alloy Parts: Powder Characterization, Density, Surface Roughness, and Dimensional Accuracy

Maamoun, Ahmed; Xue, Yi; Elbestawi, M.A.; Veldhuis, Stephen C.

doi:10.3390/ma11122343

Cited by 210 publications

(119 citation statements)

References 38 publications

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“…The energy density and each process parameter are all significant factors affecting mechanical properties [17,18]. The SLMed sample using a lower hatching distance would have a higher ultimate tensile strength (UTS) and yield strength for AlSi10Mg [18].…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Selective Laser Melting Process Parameters on Relative Density of the AlSi10Mg Parts and Suitable Procedures of the Archimedes Method

et al. 2019

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In view of the importance of accurately measuring the relative density of a selective laser melted (SLMed) part for optimizing the selective laser melting (SLM) processing parameters, suitable procedures of the Archimedes method considering the surface-connected cavities were proposed by comparing the results using the Archimedes method with image analysis. The effects of the SLM processing parameters on the relative density of AlSi10Mg were investigated using the proposed procedures of the Archimedes methods and image analysis. Fourteen SLMed samples were produced by different SLM processing parameters according to Doehlert Matrix. The regression models correlating relative density and three SLM processing parameters (laser power, scan speed, and hatching distance) were built and the optimum parameter combination to get a high relative density was obtained. By plotting the response surfaces and contours of the regression models, it was found that the relative densities are both higher at the combination of the higher scan speed, higher power, and lower hatching distance and at the combination of a lower scan speed, a moderate laser power, and a optional hatching distance. It was also found that the parameter of hatching distance is the crucial parameter to get a high relative density and to get high mechanical property.

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Section: Introductionmentioning

confidence: 99%

“…In the most recent studies focusing on optimizing the SLM process parameters [17,18], the laser power reached less than 400 W because of the limitation of equipment. Therefore, a greater range of laser power will be conducive to finding the optimum combination of processing parameters.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Selective Laser Melting Process Parameters on Relative Density of the AlSi10Mg Parts and Suitable Procedures of the Archimedes Method

et al. 2019

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“…[27][28][29][30][31][32][33] The effects of process parameters of DLD on microstructure and mechanical properties can be found in previous studies. A great number of publications examine the effects of these process parameters on part quality for selective laser melting (SLM)/ direct metal laser sintering (DMLS) processes.…”

Section: Am Technology Backgroundmentioning

confidence: 97%

“…[84] Copyright 2015, Elsevier. [31] In addition to laser power, the scan speed is equally important, as shown in Figure 11. The properties of a material that has been additively manufactured are determined by the chemical and phase composition, grain size, and more importantly for AM parts the presence of defects such as pores, cracks, and surface roughness.…”

Section: Microstructure Of Am Alloysmentioning

confidence: 99%

Laser‐Based Additive Manufacturing Technologies for Aerospace Applications

2019

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Additive manufacturing (AM) is a transformative technology that has rapidly grown over the past decade. AM processes build parts layer by layer and have found applications in the aerospace, biomedical, and automotive fields. The technology holds particular promise for the aerospace industry due to the reduced process time, weight savings of parts, and opportunities for new material development. Herein, a review of laser-based AM processes, existing AM systems, and aerospace parts being fabricated is presented. It further explores the material properties and microstructure of printed samples with both powder bed fusion and direct energy deposition processes. The benefits and challenges associated with the widespread use of the technology are discussed with emphases on the aerospace sector. Finally, the steps required for parts produced by AM processes to become certified for use in aerospace applications are presented.

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“…Various researches were made regarding the proper process parameters definition and it was observed that a number of process variables for AM are generally used to optimize different characteristics, targeting certain properties of the produced material. Typically, the dimensional accuracy, surface quality and other intrinsic properties of SLM parts are related to variable process parameters such as: laser power, scanning speed, scanning strategy, layer thickness, hatch distance [8,9].…”

Section: Introductionmentioning

confidence: 99%

Edge and corner effects in selective laser melting of IN 625 alloy

Matache¹,

Vladut²,

Paraschiv³

et al. 2020

Manufacturing Rev.

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Experimental investigations on top surface of prismatic specimens, manufactured by Selective Laser Melting of IN 625 alloy, were carried out in order to assess the influence of laser power and scanning speed on edge and corner effects. Since the melt-pool behaviour is strongly influenced by the process parameters, all specimens were manufactured with no contour using the same layer thickness, hatch distance and scanning strategy at different levels of laser powers and scanning speeds. 3D laser surface scanning was performed in order to measure surface changes. The experimental results have revealed that melt-pool behaviour during solidification generates elevated ridges on both specimen sides and corners that are strongly influenced by the energy input. The edge ridges width increases with increasing the laser power and decrease with increasing the scanning speed, the rising of corners being much more pronounced. On the contrary, at constant laser power and variable scanning speeds the edge and corner ridges decrease.

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Effect of Selective Laser Melting Process Parameters on the Quality of Al Alloy Parts: Powder Characterization, Density, Surface Roughness, and Dimensional Accuracy

Cited by 210 publications

References 38 publications

The Effects of Selective Laser Melting Process Parameters on Relative Density of the AlSi10Mg Parts and Suitable Procedures of the Archimedes Method

The Effects of Selective Laser Melting Process Parameters on Relative Density of the AlSi10Mg Parts and Suitable Procedures of the Archimedes Method

Laser‐Based Additive Manufacturing Technologies for Aerospace Applications

Edge and corner effects in selective laser melting of IN 625 alloy

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