Influence of the direction of selective laser sintering on machinability of parts from 316L steel

Alexeev, V P; Balyakin, Andrey; Khaimovich, Alexander

doi:10.1088/1757-899x/177/1/012120

Cited by 11 publications

(8 citation statements)

References 3 publications

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“…They concluded that the machinability of this material is worse in comparison to the wrought reference [27]. Alexeev et al [28] showed that the magnitude of the cutting force depends on the direction of feed motion of the end mill relative to the build-up direction (BUD) of the workpieces (AISI 316 L) during L-PBF. Milling perpendicular to the BUD caused higher forces than milling parallel to the direction of build-up [28].…”

Section: Introductionmentioning

confidence: 99%

“…Alexeev et al [28] showed that the magnitude of the cutting force depends on the direction of feed motion of the end mill relative to the build-up direction (BUD) of the workpieces (AISI 316 L) during L-PBF. Milling perpendicular to the BUD caused higher forces than milling parallel to the direction of build-up [28]. Differences with respect to the results of finishing were also documented between a L-PBF Inconel 718 and a cast reference in grinding.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the machinability when milling AlSi10Mg additively manufactured via laser-based powder bed fusion

Zimmermann

Müller

Kirsch

et al. 2020

Int J Adv Manuf Technol

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Laser-based powder bed fusion (L-PBF) is a promising technology for the production of near net–shaped metallic components. The high surface roughness and the comparatively low-dimensional accuracy of such components, however, usually require a finishing by a subtractive process such as milling or grinding in order to meet the requirements of the application. Materials manufactured via L-PBF are characterized by a unique microstructure and anisotropic material properties. These specific properties could also affect the subtractive processes themselves. In this paper, the effect of L-PBF on the machinability of the aluminum alloy AlSi10Mg is explored when milling. The chips, the process forces, the surface morphology, the microhardness, and the burr formation are analyzed in dependence on the manufacturing parameter settings used for L-PBF and the direction of feed motion of the end mill relative to the build-up direction of the parts. The results are compared with a conventionally cast AlSi10Mg. The analysis shows that L-PBF influences the machinability. Differences between the reference and the L-PBF AlSi10Mg were observed in the chip form, the process forces, the surface morphology, and the burr formation. The initial manufacturing method of the part thus needs to be considered during the design of the finishing process to achieve suitable results.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the machinability when milling AlSi10Mg additively manufactured via laser-based powder bed fusion

Zimmermann

Müller

Kirsch

et al. 2020

Int J Adv Manuf Technol

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show abstract

“…Changing process forces were determined in dependence on the dimensions of the melt paths of the workpiece microstructure. The differences are due to the melt borders resulting from SLM, which prevent deformations of dislocations during milling and thus increase cutting forces [13].…”

Section: Introductionmentioning

confidence: 99%

Micro milling of additively manufactured AISI 316L: impact of the layerwise microstructure on the process results

Greco

Kieren-Ehses

Kirsch

et al. 2020

Int J Adv Manuf Technol

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In the field of metal additive manufacturing (AM), one of the most used methods is selective laser melting (SLM)—building components layer by layer in a powder bed via laser. The process of SLM is defined by several parameters like laser power, laser scanning speed, hatch spacing, or layer thickness. The manufacturing of small components via AM is very difficult as it sets high demands on the powder to be used and on the SLM process in general. Hence, SLM with subsequent micromilling is a suitable method for the production of microstructured, additively manufactured components. One application for this kind of components is microstructured implants which are typically unique and therefore well suited for additive manufacturing. In order to enable the micromachining of additively manufactured materials, the influence of the special properties of the additive manufactured material on micromilling processes needs to be investigated. In this research, a detailed characterization of additive manufactured workpieces made of AISI 316L is shown. Further, the impact of the process parameters and the build-up direction defined during SLM on the workpiece properties is investigated. The resulting impact of the workpiece properties on micromilling is analyzed and rated on the basis of process forces, burr formation, surface roughness, and tool wear. Significant differences in the results of micromilling were found depending on the geometry of the melt paths generated during SLM.

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“…The focus of optimization is efficiency functions considered as capacity limitations, which generally arise when solving engineering problems [10,11]. Computing CAD models in CAE system helps optimize the materials used in parts' design [12,13].…”

Section: Introductionmentioning

confidence: 99%

Design Optimization of Machine Accessories through Analysis of their Elements Deformation in NX NASTRAN

Нехорошев¹,

Bezsonov²,

Meshcheryakov³

et al. 2018

Proceedings of the International Conference "Actual Issues of Mechanical Engineering" (AIME 2018)

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The article presents design optimization of machine accessories used for milling, according to required accuracy of geometrical parameter of machined part. The authors propose a computerized engineering analysis of deformation of device elements when cutting forces are applied. NX Nastran software is used for analysis. A parameter-oriented 3D model of a device was created for the procedure. The model was built with NX CAM software using the variable parameterization method that provides for developing multiplechoice flexible models of device assembly. The authors analyzed multiple designs of device elements which, when deformed under cutting forces, directly influenced the accuracy of geometrical dimension acquired after processing. It is shown that application of NX Nastran software and a parameter-oriented 3D model of the device facilitates the process of device redesign according to technical requirements for operation and machining conditions, thus significantly reducing engineering time and level of errors that occur throughout design and production stages.

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Influence of the direction of selective laser sintering on machinability of parts from 316L steel

Cited by 11 publications

References 3 publications

Analysis of the machinability when milling AlSi10Mg additively manufactured via laser-based powder bed fusion

Analysis of the machinability when milling AlSi10Mg additively manufactured via laser-based powder bed fusion

Micro milling of additively manufactured AISI 316L: impact of the layerwise microstructure on the process results

Design Optimization of Machine Accessories through Analysis of their Elements Deformation in NX NASTRAN

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