Laser incidence angle influence on energy density variations, surface roughness, and porosity of additively manufactured parts

Fathi-Hafshejani, Parvin; Soltani-Tehrani, Arash; Shamsaei, Nima; Mahjouri‐Samani, Masoud

doi:10.1016/j.addma.2021.102572

Cited by 16 publications

(7 citation statements)

References 36 publications

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“…Several studies have suggested that the E L has an influence on the structural properties of PBF‐LB/M manufactured materials such as texture, porosity, and microstructure. [ 30,49,50 ] However, likely to the relatively narrow E L ‐range investigated here, the structural features are similar regardless to the applied E L . To further assess the impact of different microstructural states, samples were annealed, as described earlier.…”

Section: Resultsmentioning

confidence: 83%

“…In order to gain more information about the role of the ECSA, CVs at different scan rates (5,10,20,30,40,50,80,100,150, and 200 mV s −1 ) were performed in the potential range 0.8-1.0 V versus RHE (Figure S7, Supporting Information) to obtain the double layer capacitance (C dl ). The average of the anodic and cathodic current was then plotted against the scan rate.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Additively Manufactured Iron‐Based Bulk Metallic Glass Composite Electrocatalysts: Effect of Microstructural States on the Oxygen Evolution Reaction Activity

Wegner

Martínez‐Hincapié

Čolić

et al. 2023

Adv Materials Inter

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Section: Resultsmentioning

confidence: 83%

Section: Electrochemical Characterizationmentioning

confidence: 99%

Additively Manufactured Iron‐Based Bulk Metallic Glass Composite Electrocatalysts: Effect of Microstructural States on the Oxygen Evolution Reaction Activity

Wegner

Martínez‐Hincapié

Čolić

et al. 2023

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…Furthermore, all the articles dealing with the effect of printing and process parameters on roughness were gathered into another category. In this category, eleven articles focusing on metal AM processes [30][31][32][33][34][35][36][37][38][39][40] and three articles, which focus on polymer parts in FFF [41][42][43] were identified. For instance, Panahizadeh et al [35] investigated laser powder bed fusion and optimized the parameters of laser power, scanning speed, hatch space, scanning pattern angle, and heat treatment temperatures, using the multiobjective non-dominant sorting genetic algorithm, to obtain parameter combinations that lead to maximum relative density and minimum roughness on Ti6Al4V samples.…”

Section: Surfacementioning

confidence: 99%

Surface Properties and Tribological Behavior of Additively Manufactured Components: A Systematic Review

et al. 2023

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Innovative additive manufacturing processes for resilient and sustainable production will become even more important in the upcoming years. Due to the targeted and flexible use of materials, additive manufacturing allows for conserving resources and lightweight design enabling energy-efficient systems. While additive manufacturing processes were used in the past several decades mainly for high-priced individualized components and prototypes, the focus is now increasingly shifting to near-net-shape series production and the production of spare parts, whereby surface properties and the tribological behavior of the manufactured parts is becoming more and more important. Therefore, the present review provides a comprehensive overview of research in tribology to date in the field of additively manufactured components. Basic research still remains the main focus of the analyzed 165 papers. However, due to the potential of additive manufacturing processes in the area of individualized components, a certain trend toward medical technology applications can be identified for the moment. Regarding materials, the focus of previous studies has been on metals, with stainless steel and titanium alloys being the most frequently investigated materials. On the processing side, powder bed processes are mainly used. Based on the present literature research, the expected future trends in the field of tribology of additively manufactured components can be identified. In addition to further basic research, these include, above all, aspects of process optimization, function integration, coating, and post-treatment of the surfaces.

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“…Nevertheless, the compaction roller during the lay-up process causes the income tape to have curvature characteristics. The tilted beam leads to a laser beam spot elongation [ 13 , 14 ] and incident angle variation, resulting in non-uniform laser power density distribution on the surface of the income tape. A shadow zone is formed before the nip point [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Curvature Feature on Laser Heating during Tape Placement Process for Carbon Fiber Reinforced Polyether Ether Ketone Composite

Liu

Huan

et al. 2023

Polymers

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The curvature feature makes the irradiance and absorptivity change, resulting in an uneven power density distribution, which affects the quality of composite parts. In this study, a theoretical model-based Super-Gaussian profile beam in the laser irradiation area was established to obtain the heat flux distribution on the curved surface. The effect of curvature on the surface scattering reflection, temperature distribution, and surface morphology were investigated and verified the validity of the theoretical model. Furthermore, the influence of the laser intensity distribution, laser inclination and curvature radius on the power density distribution and distribution uniformity were studied. Research indicated that the power density increases as the distance from the origin increase resulting from the variation of the irradiance and absorptance along the circumference. The flatter the intensity distribution of the laser beam in the height direction, the less uniform the power density distribution. Accordingly, the typical Gaussian profile beam significantly ameliorates the power density distribution. This research provides a novel understanding of using heat sources during laser heating thermoplastic tape placement.

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Laser incidence angle influence on energy density variations, surface roughness, and porosity of additively manufactured parts

Cited by 16 publications

References 36 publications

Additively Manufactured Iron‐Based Bulk Metallic Glass Composite Electrocatalysts: Effect of Microstructural States on the Oxygen Evolution Reaction Activity

Additively Manufactured Iron‐Based Bulk Metallic Glass Composite Electrocatalysts: Effect of Microstructural States on the Oxygen Evolution Reaction Activity

Surface Properties and Tribological Behavior of Additively Manufactured Components: A Systematic Review

Influence of Curvature Feature on Laser Heating during Tape Placement Process for Carbon Fiber Reinforced Polyether Ether Ketone Composite

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