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

Seo, Youngjin; Lee, Dongkyoung; Pyo, Sukhoon

doi:10.3390/ma13030546

Cited by 19 publications

(11 citation statements)

References 26 publications

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“…In addition, a glassy layer was formed on the sidewalls and the surface of the material removal zone of the cement-based materials, as shown in Figure 13c,d. It should be noted that the microstructural changes based on the SEM/EDX analysis of the cement-based materials under laser interaction can be found in the authors' previous research [25].…”

Section: Interaction Mechanism Between Laser and Cement-based Materialsmentioning

confidence: 71%

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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Section: Interaction Mechanism Between Laser and Cement-based Materialsmentioning

confidence: 71%

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

2020

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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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“…Laser-aided manufacturing has various advantages, such as contactless process, high-energy concentration, fast processing time, a small Heat-Affected Zone (HAZ), and applicability to almost every material. Thus, laser technology has been applied to many different types of materials such as sandwiched composites [11][12][13][14][15][16][17][18][19], reinforced composites [13,[20][21][22], and plated metals [23][24][25][26]. Experimental studies were conducted to investigate the effect of physical phenomena [11,15,16,19] and interaction characteristic [12,17,18] during laser cutting of electrode for lithium-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Study on the interaction characteristics of acrylonitrile butadiene styrene and UV laser

Son

Lee

2020

Archiv.Civ.Mech.Eng

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3D printing technology is currently used in various fields. Precision is also becoming more important as the usage of the 3D printing increases. However, the precision of the 3D printing is still low due to limitations of manufacturing methods. Especially, the surface roughness and quality are inconsistent. While the post-treatment is necessary, there are no systematic post-treatment methods. Thus, using the laser for the post-treatment of 3D printing would be a good option because it has many advantages for precision engineering. To be used for the post-treatment process, it is essential to understand the interaction characteristics between the laser and the 3D printing materials. Therefore, this study uses an UV pulsed laser and the acrylonitrile butadiene styrene (ABS), which is the most popular material for 3D printing, to understand the interaction characteristics. Furthermore, the effect of surface roughness on the interaction characteristics is also studied. The ABS specimens are prepared by an acetone fumigation technique and CNC milling. The laser is applied by varing laser pulse energy (50-340 μJ) on the ABS specimens. As the surface roughness decreases, it is confirmed that laser and ABS interaction have a certain pattern. For the specimen prepared by the acetone fumigation technique, Heat Affected Zone decreases with decreasing the laser pulse energy. The specimen prepared by end milling requires higher laser ablation threshold.

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

Cited by 19 publications

References 26 publications

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

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

The Effect of Laser Parameters on Cutting Metallic Materials

Study on the interaction characteristics of acrylonitrile butadiene styrene and UV laser

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