Laser polishing of 3D printed mesoscale components

Bhaduri, Debajyoti; Penchev, Pavel; Batal, Afif; Dimov, Stefan Simeonov; Soo, Sein Leung; Sten, Stella; Harrysson, Urban; Zhang, Zhenxue; Dong, Hanshan

doi:10.1016/j.apsusc.2017.01.211

Cited by 198 publications

(93 citation statements)

References 44 publications

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“…The lower strength of unpolished Cu/PLA sample is primarily due to the gaps and the extensive porosities inside the sample because of the poor printing quality. After laser polishing, the porosity and bulk defects are reduced, and the interface bonding between the Cu fiber and the PLA matrix is improved, resulting in an increase in polymer chain anchoring on the fiber . From Table , it is observed that after laser polishing, the elongation‐at‐break decreases by 24.41%, 32.83%, 28.37%, and 37.84% for S1, S2, S3, and S4, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Laser polishing is performed by irradiating a laser beam with a certain energy density and wavelength on a material to melt or evaporate the surface layer of the material to obtain a smooth surface. This method does not require any mechanical abrasives or polishing tools and can polish surfaces with very complex topography that are difficult or impossible to polish with conventional polishing methods . Laser polishing has so far been used to polish a variety of materials, including diamonds, glass, ceramics, and various metals .…”

Section: Introductionmentioning

confidence: 99%

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Laser polishing of Cu/PLA composite parts fabricated by fused deposition modeling: Analysis of surface finish and mechanical properties

et al. 2019

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Fused deposition modeling (FDM) technology decreases production time and cost in engineering industry, but with typical low surface quality. In this study, laser polishing was employed to improve surface quality of copper fiber/polylactide acid (Cu/PLA) composite parts fabricated by FDM. Surface roughness, surface morphology, dynamic mechanical analysis (DMA), and tensile properties were studied. The results showed that after laser polishing, the surface roughness was reduced by more than 91% (from 10.52 to 0.87 μm Sa) at the optimized parameters (the laser power of 5 W and the laser beam diameter of 200 μm). Laser polishing can effectively remove surface defects formed during FDM. DMA showed that the storage modulus, loss modulus, and glass transition temperature of Cu/PLA composites were significantly improved, because the Cu fibers and PLA matrix formed a strong interfacial adhesion after treatment. Moreover, the tensile strength and Young's modulus of the Cu/PLA composites sample also improved by laser polishing. The fracture morphologies were observed, and the possible strengthening mechanism was also discussed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Laser polishing of Cu/PLA composite parts fabricated by fused deposition modeling: Analysis of surface finish and mechanical properties

et al. 2019

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“…Macrostructure smoothing can be achieved by applying continuous wave (cw) laser radiation, this process is known as laser polishing (LP) and it is mainly focused on improving the surface quality of AM components via demolishing surface asperities. Although several attempts have been made to examine the effects of laser polishing and the resulting surface roughness, there has been no detailed and thorough investigation of the effect of process parameters on the generated surface, to enable prediction and optimisation of the process responses [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of process parameters on surface texture generated by laser polishing of additively manufactured Ti-6Al-4V

Solheid¹,

Elkaseer

Wunsch

et al. 2020

Laser-Based Micro- And Nanoprocessing XIV

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Although there have been numerous attempts to define how different laser polishing parameters affect the generated surface roughness, there has been no detailed investigation of how their effects can be combined to optimize the process. This paper applies statistical analysis to model and predict the resulting surface roughness for laser post-processing of components made of Ti-6Al-4V and produced by laser powder bed fusion. This model is based on analysis of a wideranging experimental programme investigating how the interaction of the governing parameters, i.e., laser power, number of repetitions, axial feed rate, scanning speed, and focal position, affected surface roughness. The experimental programme was the result of a robust Design of Experiments analysis and experimental analysis using ANOVA. It is expected that the outcomes will contribute towards the understanding of how the governing parameters influence the laser polishing process and final surface roughness, and would be a tool for optimizing their selection. The results of the ANOVA (analysis of variance) revealed that the most significant parameters are scanning speed followed by laser power and then axial feed rate. In addition, a clear tendency for the estimated Ra to decrease with the increase in laser power at lower values of axial feed rate and of scanning speed, and a focal position in the region of 2 mm. It is noted that the process parameters were varied over wide ranges, including extreme values, which made it difficult to accurately model the dependent variable over the full range of experimental trials.

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“…Consequently, the total porosity, pore size and size distribution cannot be controlled (Kasperovich et al, 2016). Therefore, post-processes such as mechanical polishing, chemical etching, heat treatment and anodizing are very crucial (Tarafder et al, 2013;Sadie and Subramanian, 2014;Pequegnat et al, 2015;Bhaduri et al, 2017;Shamvedi et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

The Characteristics of Selective 3D Metal Additive Process Using Electrochemical Deposition and Nozzle Fluid Dynamics

Kim¹,

Kang

Kim³

et al. 2020

Front. Mech. Eng.

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In this study, we investigated the characteristics of the three-dimensional (3D) additive printing process of pure copper(Cu) on metal substrates through the localized electroplating with precisely controlled nozzle fluid dynamics. In addition, we analyzed the characteristics of 3D shape formations in relation to the changes in the main electroplating factors, such as electrolyte temperature, applied current, nozzle pressure, and distance between the working electrode and the nozzle. The variations of the surface texture and growth rate owing to these factors were confirmed and optimum condition was investigated. Finally, the successful fabrication of complicated 3D structures, such as micro coils and star-like pattern were demonstrated through the proposed method.

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Laser polishing of 3D printed mesoscale components

Cited by 198 publications

References 44 publications

Laser polishing of Cu/PLA composite parts fabricated by fused deposition modeling: Analysis of surface finish and mechanical properties

Laser polishing of Cu/PLA composite parts fabricated by fused deposition modeling: Analysis of surface finish and mechanical properties

Effect of process parameters on surface texture generated by laser polishing of additively manufactured Ti-6Al-4V

The Characteristics of Selective 3D Metal Additive Process Using Electrochemical Deposition and Nozzle Fluid Dynamics

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