Understanding of BeCu Interaction Characteristics with a Variation of ns Laser-Pulse Duration

Lee, Dongkyoung

doi:10.3390/ma11081423

Cited by 9 publications

(10 citation statements)

References 40 publications

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“…Laser-Aided Manufacturing (LAM), on the other hand, has many advantages, and is therefore used in a variety of applications such as automotive, aerospace, electronics and semiconductors [6][7][8][9][10][11][12][13][14][15]. LAM has an exceptionally high energy density and can be focused to highly localized areas.…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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

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%

“…Furthermore, the laser processing was applied to investigate the penetration mechanism [13,20,21] and microstructure characteristics [22] after laser cutting of cement-based materials. The other experiments were studied to fully utilize laser spot cutting on plated metals [23][24][25][26].…”

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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Understanding of BeCu Interaction Characteristics with a Variation of ns Laser-Pulse Duration

Cited by 9 publications

References 40 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

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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