Parametric Optimization For A Quality Prototype From Selective Laser Sintering: Grey Taguchi Method

Narayana, B. Venkata; Venkatesh, Sriram

doi:10.1016/j.matpr.2019.07.385

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…The mechanical characteristics of the hip joint prostheses made using SLS highly depend on the process parameters, part positioning, and part orientation during the manufacturing process. The main technological parameters of the SLS process are the following: laser power, scanning speed, layer thickness, etc., which should be set up according to the biocompatible powder chosen for the fabrication process [ 25 ]. During the last few years, several studies focused on how to determine the proper SLS process parameters for each material used to produce parts using this technology.…”

Section: Introductionmentioning

confidence: 99%

Selective Laser Sintering of PA 2200 for Hip Implant Applications: Finite Element Analysis, Process Optimization, Morphological and Mechanical Characterization

et al. 2021

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Polyamide 12 (PA 22000) is a well-known material and one of the most biocompatible materials tested and used to manufacture customized medical implants by selective laser sintering technology. To optimize the implants, several research activities were considered, starting with the design and manufacture of test samples made of PA 2200 by selective laser sintering (SLS) technology, with different processing parameters and part orientations. The obtained samples were subjected to compression tests and later to SEM analyses of the fractured zones, in which we determined the microstructural properties of the analyzed samples. Finally, an evaluation of the surface roughness of the material and the possibility of improving the surface roughness of the realized parts using finite element analysis to determine the optimum contact pressure between the component made of PA 2200 by SLS and the component made of TiAl6V4 by SLM was performed.

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Section: Introductionmentioning

confidence: 99%

Selective Laser Sintering of PA 2200 for Hip Implant Applications: Finite Element Analysis, Process Optimization, Morphological and Mechanical Characterization

et al. 2021

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“…Variance analysis can be utilized to determine the degree of influence different process parameters have on bending strength of sintered parts, enabling optimiza-tion and identification of an optimal combination of process parameters. The analysis of variance of the bending strength of composite sintered parts was calculated according to Formulae (3)-( 6) as shown in Table 3 [28], with corresponding variance analysis shown in Table 4 based on these calculations.…”

Section: Resultsmentioning

confidence: 99%

“…Variance analysis can be utilized to determine the degree of influence different process parameters have on bending strength of sintered parts, enabling optimization and identification of an optimal combination of process parameters. The analysis of variance of the bending strength of composite sintered parts was calculated according to Formulae (3)–(6) as shown in Table 3 [ 28 ], with corresponding variance analysis shown in Table 4 based on these calculations.

where

—sum of test indicators at the ith level of the test factor in column j;

—mean value of the test indicator at the ith level of factor j; k—level number; n—number of tests;

—column j range;

—sum of squares of variance at different levels of test factor in Column j; T—measure the sum of test indexes;

—measured values of test indicators per test number.…”

Section: Discussionmentioning

confidence: 99%

Process Study of Selective Laser Sintering of PS/GF/HGM Composites

Liu,

Zhu,

Zhang

et al. 2024

Materials

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To address the issues of insufficient strength and poor precision in polystyrene forming parts during the selective laser sintering process, a ternary composite of polystyrene/glass fiber/hollow glass microbeads was prepared through co-modification by incorporating glass fiber and hollow glass microbeads into polystyrene using a mechanical mixing method. The bending strength and dimensional accuracy of the sintered composites were investigated by conducting an orthogonal test and analysis of variance to study the effects of laser power, scanning speed, scanning spacing, and delamination thickness. The process parameters were optimized and selected to determine the optimal combination. The results demonstrated that when considering bending strength and Z-dimensional accuracy as evaluation criteria for terpolymer sintered parts, the optimum process parameters are as follows: laser power of 24 W, scanning speed of 1600 mm/s, scanning spacing of 0.24 mm, and delamination thickness of 0.22 mm. Under these optimal process parameters, the bending strength of sintered parts reaches 6.12 MPa with a relative error in the Z-dimension of only 0.87%. The bending strength of pure polystyrene sintered parts is enhanced by 15.69% under the same conditions, while the relative error in the Z-dimension is reduced by 63.45%. It improves the forming strength and precision of polystyrene in the selective laser sintering process and achieves the effect of enhancement and modification, which provides a reference and a new direction for exploring polystyrene-based high-performance composites and expands the application scope of selective laser sintering technology.

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DIRECT METAL LASER SINTERING TO DEVELOP COMPLEX CONTOURS OF AlSi10Mg ALUMINIUM ALLOY — BUILD PARAMETERS OPTIMIZATION

JASWIN,

GEETHA,

SARAVANAN

et al. 2024

Surf. Rev. Lett.

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In the recent years, Additive Manufacturing (AM) has become a very demanding process utilized by majority of the manufacturing industries due to its complex geometrical capabilities, high accuracy, minimal material usage and better build quality. Among the various types of AM methods, Direct Metal Laser Sintering (DMLS) is a feasible method with many applications and a lot of scope for research. This paper focuses on optimizing the important parameters of DMLS process for better build quality of AlSi10Mg Aluminium alloy. The parameters identified are laser power, hatch distance, scanning speed, and layer thickness. Grey–Taguchi multi response optimization method has been used. Experimental specimens were fabricated and tested. Micro-Vickers hardness and average surface roughness were studied. Experiments were analyzed to determine the best combination of parameters of the DMLS process. A detailed micro-structural study was conducted on the specimens. Also, crystallographic study was made. The resultant specimen thus produced had a better build quality along with satisfying micro-structural characteristics.

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Parametric Optimization For A Quality Prototype From Selective Laser Sintering: Grey Taguchi Method

Cited by 3 publications

References 10 publications

Selective Laser Sintering of PA 2200 for Hip Implant Applications: Finite Element Analysis, Process Optimization, Morphological and Mechanical Characterization

Selective Laser Sintering of PA 2200 for Hip Implant Applications: Finite Element Analysis, Process Optimization, Morphological and Mechanical Characterization

Process Study of Selective Laser Sintering of PS/GF/HGM Composites

DIRECT METAL LASER SINTERING TO DEVELOP COMPLEX CONTOURS OF AlSi10Mg ALUMINIUM ALLOY — BUILD PARAMETERS OPTIMIZATION

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