Effect of Laser Speed on Cutting Characteristics of Cement-Based Materials

Lee, Dongkyoung; Seo, Youngjin; Pyo, Sukhoon

doi:10.3390/ma11071055

Cited by 21 publications

(19 citation statements)

References 34 publications

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“…LU set the different weight of silica fume and silica powder, respectively. The detailed mixture design and compressive strength can be found in Lee et al [16].…”

Section: Materials and MIX Designmentioning

confidence: 99%

“…MRZ is the area where the material is vaporized and removed by laser. On the contrary, HAZ is the area where material is not removed and only affected by heat [16,17]. Since the perfectly cut specimens exist only in the MRZ at the cut surface, the partially penetrated specimen is used to compare MRZ with HAZ.…”

Section: Microstructure Of the Processed Cement-based Materialsmentioning

confidence: 99%

“…By applying these advantages, Lee et al [16,17] applied a laser cutting technique to cement composites using a 1-kW multi-mode fiber laser (IPG YLS-1000). In addition to the geometrical parameters, the Energy Dispersive X-Ray (EDX) component analysis was used to study the compositional changes before and after the laser cutting of the composite surface.…”

Section: Introductionmentioning

confidence: 99%

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Microstructural Characteristics of Cement-Based Materials Fabricated Using Multi-Mode Fiber Laser

2020

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Cement-based materials are the most prevalent construction materials, and the conventional cutting techniques are still mostly used for fabricating the materials. However, these conventional cutting methods could generate undesirable micro-cracks and remove unintentional structural sections. This experimental study aims to evaluate the effects of the new fabricating method using laser on the microstructural characteristics of the cement-based materials. The experimental variables are laser cutting speed, water to cement ratio and material compositions. In order to compare the microstructure before and after the laser interaction, the microstructure of the cut surface is observed through scanning electron microscopy/energy dispersive X-Ray (SEM/EDX). After the laser interaction, the Material Removed Zone (MRZ) and Heat Affected Zone (HAZ) are observed on the cut surface. In MRZ, it is found that the glassy layer is thickened by an increasing amount of silicate-based materials in cement-based materials. In addition, it concluded that the amount of silicate-based material mixed in the cement-based materials affects the laser cutting quality.

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“…LU set the different weight of silica fume and silica powder, respectively. The detailed mixture design and compressive strength can be found in Lee et al [16].…”

Section: Materials and MIX Designmentioning

confidence: 99%

Section: Microstructure Of the Processed Cement-based Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructural Characteristics of Cement-Based Materials Fabricated Using Multi-Mode Fiber Laser

2020

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“…Their research demonstrated the feasibility of remotely using a laser-based concrete cutting technique by specifying the core diameter of the fiber and the fiber length as parameters. Lee et al [13] used a 1 kW multimode continuous fiber laser (YLS-1000 MM, IPG) emitting at 1070 nm to evaluate the variation of physical and chemical composition of cement-based materials after the laser cutting performance. In particular, they measured compositional variations using energy-dispersive X-ray spectroscopy to study the compositional change before and after the laser interaction with cement-based materials.…”

Section: Introductionmentioning

confidence: 99%

High-Power Fiber Laser Cutting for 50-mm-Thick Cement-Based Materials

2020

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This experimental research highlights the applicability of laser cutting to cement-based materials using multimode fiber lasers. A 9 kW multimode fiber laser is used, and the experimental variables are the water-to-cement ratio, laser speed, and material compositions such as cement paste, cement mortar and ultra high performance concrete (UHPC). The laser cutting performance on the cement-based materials is investigated in the downward laser direction. The kerf width and penetration depth of the cement-based materials are quantitatively evaluated with the parameters in the surface and cross section of the specimens after the laser cutting. Moreover, the material removal zone of each specimen is compared in terms of the penetration shapes in the cross-sectional view. Based on experimental observations, the interaction mechanism between the laser and cement-based materials is proposed.

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“…Laser machining can be performed on various materials without tool wear and additional cost. The method is non-contact processing, which provides flexibility in processing [ 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. Among the laser system used by industries, the CO 2 laser has more economical than other laser systems.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Laser Parameters on Cutting Metallic Materials

Son

Lee

2020

Materials

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This experimental study investigated the effect of laser parameters on the machining of SS41 and SUS304. The metallic materials play an important role in engineering applications. They are widely used in high-tech industries such as aerospace, automotive, and architecture. Due to the development of technology and high-tech industrialization, the various processing technologies are being developed with the requirement of high precision. However, the conventional cutting process is difficult to meet high precision processing. Therefore, to achieve high precision processing of the SS41 and SUS304, laser manufacturing has been applied. The current study investigated the process quality of laser cutting for SS41 and SUS304, with the usage of a continuous wave CO2 laser cutting system. The experimental variables are set to the laser cutting speed, laser power, and different engineering materials. The results are significantly affected by the laser parameters. As the result, the process quality of the laser cutting has been observed by measuring the top and bottom kerf widths, as well as the size of the melting zone and Heat Affected Zone (HAZ) according to volume energy. In addition, the evaluation of the laser processing parameters is significantly important to achieve optimal cutting quality. Therefore, we observed the correlation between the laser parameters and cutting quality. These were evaluated by analysis of variance (ANOVA) and multiple regression analysis. The experimental results of kerf top, kerf bottom, melting width, and HAZ on the laser parameters are properly predicted by multiple regression. In addition, the effect of laser parameters on the materials is determinant by the percentage of contribution of ANOVA.

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Effect of Laser Speed on Cutting Characteristics of Cement-Based Materials

Cited by 21 publications

References 34 publications

Microstructural Characteristics of Cement-Based Materials Fabricated Using Multi-Mode Fiber Laser

Microstructural Characteristics of Cement-Based Materials Fabricated Using Multi-Mode Fiber Laser

High-Power Fiber Laser Cutting for 50-mm-Thick Cement-Based Materials

The Effect of Laser Parameters on Cutting Metallic Materials

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