Analysis of the influence of L-PBF porosity on the mechanical behavior of AlSi10Mg by XRCT-based FEM

Pascual, Alejandro; Ortega, Naiara; Plaza, Soraya; Lacalle, Luis Norberto López de; Ukar, Eneko

doi:10.1016/j.jmrt.2022.11.172

Cited by 13 publications

(2 citation statements)

References 56 publications

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“…However, extracting key information and establishing correlation functions from limited data analysis poses a current challenge. [1][2][3][4][5][6][7] Addressing the dynamic coupling effect of the radial force, axial force components, and bending moment of the bearing, Zhao et al 8 proposed a prediction method for the service life of the hub bearing under multi-axis loading conditions. Hu et al 9 introduced an energy method to solve address shock absorber lifespan concerns under different types of loading, with test results correlating with actual service mileage.…”

Section: Introductionmentioning

confidence: 99%

Equivalent method for assessment of bearings at operational types of loadings

Wang,

Zhou,

Yang

et al. 2024

Advances in Mechanical Engineering

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To investigate the effect of various factors on bearing stress response, Huber-Hencky-von Mises stress serves as a bridge, the equivalent interrelation between radial loading, axial loading, and temperature of bearing is studied using finite element method (FEM). Symbolic regression (SR) algorithm is employed to analyze simulation results, establishing a functional expression between independent and dependent variables by optimizing combinations of variables, constants, and functional forms. The results showed that within the specified force and temperature values, the curved surface of the equivalent correlation function, trained using the SR algorithm, demonstrates smoothness. Both training and validation data exhibit a strong correlation with this curved surface. Among the three factors, temperature exerts the greatest influence on bearing stress values, followed by radial loading, and axial loading components had the smallest impact.

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Section: Introductionmentioning

confidence: 99%

Equivalent method for assessment of bearings at operational types of loadings

Wang,

Zhou,

Yang

et al. 2024

Advances in Mechanical Engineering

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“…Higher ED results in higher peak temperatures and a larger volume of the melting pool. Thus, higher thermal gradients and larger residual stresses To reduce the carbon footprint, the manufacturing of lightweight structures is preferred, e.g., thin-walled titanium components used in the aerospace engineering sector, heat exchangers, and antennas [12][13][14][15][16][17][18][19]. Nonetheless, compared to thick and bulky components, the AM fabrication of lightweight parts is more challenging because they are more prone to warpages; as the building height increases, the mechanical constraint gradually reduces.…”

Section: Introductionmentioning

confidence: 99%

Recoater-Induced Distortions and Build Failures in Selective Laser Melting of Thin-Walled Ti6Al4V Parts

Chiumenti

Cervera

et al. 2023

JMMP

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Additively manufactured thin-walled structures through selective laser melting (SLM) are of great interest in achieving carbon-neutral industrial manufacturing. However, residual stresses and warpages as well as recoater crashes often occur in SLM, leading to the build failure of parts, especially for large-scale and lightweight geometries. The challenge in this work consists of investigating how the recoater affects the warpage and (sometimes) causes the failure of different thin-walled Ti6Al4V parts (wall thickness of 1.0 mm). All these parts are printed on the same platform using a commercial SLM machine. After the loose powder removal and before the cutting operation, a 3D-scanner is used to obtain the actual warpage of each component. Next, an in-house coupled thermo-mechanical finite element model suitable for the numerical simulation of the SLM process is enhanced to consider the recoater effects. This numerical framework is calibrated to predict the thin-walled warpage as measured by the 3D-scanner. The combination of numerical predictions with experimental observations facilitates a comprehensive understanding of the mechanical behavior of different thin-walled components as well as the failure mechanism due to the recoater. The findings show that the use of a higher laser energy input causes larger residual stresses and warpage responsible for the recoater crashes. Finally, potential solutions to mitigate the warpage and the recoater crashes in the SLM of lightweight structures are assessed using the validated model.

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Process parameters effect and porosity reduction on AlSi10Mg parts manufactured by selective laser melting

Rios,

Zambrano-Robledo,

Taborda

et al. 2023

Int J Adv Manuf Technol

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A study was carried out about the processing parameters in uence of an AlSi10Mg part manufactured by selective laser melting process in order to determine its optimal values and this way to improve the mechanical performance. For this purpose, a Design-of-Experiment was realized by the Taguchi method selecting a set of appro priate processing parameters (9 combinations), resulting in 45 samples whose relative densities were measured by Archimedes' principle. The results showed that a relative density of up to 99.65 % was achieved from raw data. While the statistical model by the Taguchi method indicated a comprehensive relationship between process parameters based on relative density, being laser power the major signi cance among the parameters. The Taguchi model suggested new values of process parameters, achieving AlSi10Mg parts with 99.98 % of relative density. To contrast the mechanical properties of both optimized and non-optimized parts, they were characterized by tension testing.

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Analysis of the influence of L-PBF porosity on the mechanical behavior of AlSi10Mg by XRCT-based FEM

Cited by 13 publications

References 56 publications

Equivalent method for assessment of bearings at operational types of loadings

Equivalent method for assessment of bearings at operational types of loadings

Recoater-Induced Distortions and Build Failures in Selective Laser Melting of Thin-Walled Ti6Al4V Parts

Process parameters effect and porosity reduction on AlSi10Mg parts manufactured by selective laser melting

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