Experimental study on the high-damping properties of metallic lattice structures obtained from SLM

Scalzo, F.; Totis, Giovanni; Vaglio, Emanuele; Sortino, Marco

doi:10.1016/j.precisioneng.2021.02.010

Cited by 35 publications

(13 citation statements)

References 42 publications

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“…The measured data for circle-shape and square-shape overhanging surface quality are listed in Tables 4 and 5, respectively. The mathematical prediction model on sinking distance and overhanging surface roughness of square-shape and circle-shape inner structure were calculated accordingly as shown in Equations ( 3)- (6). The analysis of variance in regression results of the sinking distance and overhanging surface roughness of square-shape and circle-shape inner structure can be found in Tables 6-10, respectively.…”

Section: Resultsmentioning

confidence: 99%

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A Multi-Objectives Genetic Algorithm Based Predictive Model and Strategy Optimization during SLM Process

Xia

Han

2022

Materials

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Selective laser melting (SLM) process was optimized in this work using multi-objectives genetic algorithm. Process parameters involved in the printing process have an obvious impact on the quality of the printed parts. As the relationship between process parameters and the quality of different parts are complex, it is quite essential to study the effect of process parameter combination. In this work, the impact of four main process parameters, including defocusing amount, laser power, scan speed and layer thickness, were studied on overhanging surface quality of the parts with different inner structures. A multiple-factor and multiple-level experiment was conducted to establish a prediction model using regression analysis while multi-objective genetic algorithm was also employed here to improve the overhanging surface quality of parts with different inner shapes accordingly. The optimized process parameter combination was also used to print inner structure parts and compared with the prediction results to verify the model we have obtained before. The prediction results revealed that sinking distance and roughness value of the overhanging surface on a square-shape inner structure can reduce to 0.017 mm and 9.0 μm under the optimal process parameters combination, while the sinking distance and roughness value of the overhanging surface on a circle-shape inner structure can decrease to 0.014 mm and 10.7 μm under the optimal process parameters combination respectively. The testing results showed that the error rates of the prediction results were all within 10% in spite of random powder bonding in the printing process, which further proved the reliability of the previous results.

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Section: Resultsmentioning

confidence: 99%

“…After that, the lifting plate under the substrate went down one-layer height while the lifting plate in supplier tank went up one-layer height. The above steps repeated until the model was printed [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Objectives Genetic Algorithm Based Predictive Model and Strategy Optimization during SLM Process

Xia

Han

2022

Materials

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“…Specimens made of unit cells with FBCCZ topology and different cell and strut size were investigated by means of pulse testing, thus proving their better damping properties with respect to the reference material. The same authors did considerably extend this investigation to AISI 316L SLM lattice structures in [31], by also producing and testing specimens having different sizes. As a result of this research, a scale-independent Rayleigh model describing the observed viscous damping properties for each lattice type was successfully validated.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Experimental Setup on the Damping Properties of SLM Lattice Structures

2022

Self Cite

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Background Metal lattice structures obtained through Selective Laser Melting may increase the strength-to-weight ratio of advanced 3D printed parts, as well as their damping properties. Recent experimental results showed that AlSi10Mg and AISI 316L lattices are characterized by higher Rayleigh damping coefficients with respect to the fully dense material. However, some unclear or contradictory results were found, depending on the experimental setup adopted for modal analysis. Objective In this work the influence of the experimental setup when performing modal analysis on different SLM AISI 316L lattice structures was deeply investigated. The study provides a critical comparison of various experimental modal analysis approaches, allowing to evaluate the influence of external damping sources and material internal damping phenomena. Methods The dynamic behaviour of SLM AISI 316L specimens incorporating lattice structures was estimated by means of pulse testing and sinusoidal excitation through an electromagnetic shaker. The validity of the viscous damping model was assessed by means of sinusoidal excitation with different levels of vibration velocity. Moreover, the influence of experimental setup on modal analysis results was critically evaluated, by considering different actuators, contact and non-contact sensors and boundary/clamping conditions. Results The classical viscous damping model describes with good approximation the damping properties of SLM lattice structures. When exciting single specimens in free-free conditions, those embedding lattice structure and unmelted metal powder filler were characterized by superior internal damping properties with respect to the specimens incorporating the lattice structure without any filler, which was however more effective than the full density equivalent material. Most of the other experimental setups introduced additional external damping sources, that could alter this important outcome. Conclusions SLM lattice structures embedded into 3D printed components provide superior damping properties against mechanical and acoustic vibrations and the metal powder filler does significantly enhance such damping capacity. A correct estimation of material internal damping was achieved by applying non-contact sensors and free-free boundary conditions, whereas other experimental setups were partly inadequate.

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“…A proposed acoustic metamaterial with metatruss lattice structure fabricated by 3D printing [16]. Scalzo [17] experimentally studied the wave propagation in AlSi10Mg and AISI 316L lattice structures. Muhammad [18] designed a lattice metamaterial based sinusoidal-shaped ligament.…”

Section: Introductionmentioning

confidence: 99%

3D printed NiTi alloy lattice cantilever beam acoustic metamaterial

Gao

Guo

Sun

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, a novel acoustic metamaterial beam attached with lattice structures and resonators is designed for elastic wave attenuation. The proposed acoustic metamaterial beam is fabricated by 3D printing with NiTi alloy. Theoretical analysis using negative effective mass is performed to derive the band gap of structure. The finite element method and experimental analysis are performed to investigate the dispersion relation and transmission spectrum. Furthermore, the effect of geometric features on the band gap is studied by simulations. Results proved that the metamaterial beam can be utilized for the control of low-frequency vibration.

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Experimental study on the high-damping properties of metallic lattice structures obtained from SLM

Cited by 35 publications

References 42 publications

A Multi-Objectives Genetic Algorithm Based Predictive Model and Strategy Optimization during SLM Process

A Multi-Objectives Genetic Algorithm Based Predictive Model and Strategy Optimization during SLM Process

Influence of the Experimental Setup on the Damping Properties of SLM Lattice Structures

3D printed NiTi alloy lattice cantilever beam acoustic metamaterial

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