Fabrication of a micro-hole array on metal foil by nanosecond pulsed laser beam machining using a cover plate

Ha, Kyoung Ho; Lee, Se Won; Kim, Janggil; Jee, Won Young; Chu, Chong Nam

doi:10.1088/0960-1317/25/2/027001

Cited by 15 publications

(4 citation statements)

References 18 publications

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“…With the development of high-precision technology, more and more high-strength, high-hardness, and hightemperature materials are needed. A number of material removal processes such as electrical discharge machining (EDM), [1][2][3] electrical ultrasonic machining (USM), 4,5 electrochemical machining (ECM), 6,7 and laser beam machining (LBM) [8][9][10] are developed for better ways of machining complex shapes in these highstrength materials.…”

Section: Introductionmentioning

confidence: 99%

Discharge current effect on machining characteristics and mechanical properties of aluminum alloy 6061 workpiece produced by electric discharging machining process

Kuo¹,

Hsu

Chen

et al. 2017

Advances in Mechanical Engineering

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In this study, machining characteristics and mechanical properties of aluminum (Al) alloy 6061 were investigated with variations in discharge currents in electrical discharge machining. The machining characteristics included the electrode wear rate, material removal rate, and roughness. Mechanical properties such as the fatigue life and surface hardness were also discussed in this work. Experimental results showed that better fatigue property of the electrical discharge machined workpiece could be obtained when the discharge current was 15 A; meanwhile, the thickness of the white layer was around 19 mm. The relationship between the thickness of the white layer and the fatigue lifetime had a very strong positive correlation. Furthermore, the repeatability and stability of the machining process were explored by the quality control chart and Shewhart control chart. The results indicated that the electrical discharge machining process under optimum operating conditions was a well-controlled procedure and stable over time.

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Section: Introductionmentioning

confidence: 99%

Discharge current effect on machining characteristics and mechanical properties of aluminum alloy 6061 workpiece produced by electric discharging machining process

Kuo¹,

Hsu

Chen

et al. 2017

Advances in Mechanical Engineering

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“…In this study, 40 μm-thick copper is used as a filter material and more than 10 W of laser beam power is used because copper is not ablated at lower powers, because of its high light reflectivity and thermal conductivity. During laser beam drilling, the outer part of the machining area of copper is held down by another plate to reduce thermal deformation [15].…”

Section: Laser Beam Machiningmentioning

confidence: 99%

Fabrication of an oil–water separation copper filter using laser beam machining

Chu

2016

J. Micromech. Microeng.

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In this study, oil and water are successfully separated using a copper filter that is fabricated using only laser beam machining. Even though copper is hydrophilic and recast copper material, which inevitably results during laser beam machining, is super-hydrophilic, the filter can prevent the water from penetrating and allow oil to flow based on surface tension of the liquids at the hole exit. For practical uses of the filter, both the pressure differences at which the filter is able to retain its ability to separate and the oil penetration rate of the filter are revealed. The fabrication process is simple and time-saving, and the filter has high durability because of lack of surface coating or surface chemical modification.

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“…Recently, nanosecond fiber lasers have been used in many micromachining related applications like engraving, microcutting, microdrilling, surface structuring on variety of surfaces including metals, polymers, and composites. [20][21][22][23][24][25][26] Although, nanosecond fiber lasers remove the material following a thermal cycle that is heating, melting and evaporation, their low cost and low maintenance makes them a lucrative choice for micromachining related applications. Fiber lasers are cost effective, low maintenance, and easy to use systems which makes it favorable for surface structuring of metals.…”

Section: Introductionmentioning

confidence: 99%

Underwater laser texturing for enhanced adhesive joint bonding strength of Al-Mg alloy

Kumar

Prakash

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this research work, nanosecond pulsed fiber laser texturing was performed on Aluminum-Mg alloy (AA5754). Effect of laser texturing as a surface pre-treatment method in adhesive bonding process was investigated in details. Laser texturing was performed in under open air condition, under static water condition and under flowing water conditions. Grid shaped textures were fabricated on Al-Mg alloy work-pieces. The geometrical parameters of grid texturing were varied at two levels. Pitch of the lines were kept at 300 and 400 μm in both horizontal as well as vertical directions. Scanning speed of laser texturing process was also varied at two levels that is 2.5 and 5 mm/s. Total four experiments were conducted in each atmospheric conditions. Surface roughness and water contact angle of each surface was evaluated. Surfaces were also characterized using scanning electron microscope. Lap shear strength of each samples were evaluated using a universal tensile testing machine (UTM). Failed surfaces were analyzed to investigate the mode of failure. It was observed that the textures created in flowing water conditions resulted in cohesive mode of failure while samples fabricated in open air and in under static water conditions failed in adhesive and mixed mode respectively. Samples prepared in flowing water conditions resulted in higher lap shear strengths compared to static water, open air, and plain surfaces.

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Fabrication of a micro-hole array on metal foil by nanosecond pulsed laser beam machining using a cover plate

Cited by 15 publications

References 18 publications

Discharge current effect on machining characteristics and mechanical properties of aluminum alloy 6061 workpiece produced by electric discharging machining process

Discharge current effect on machining characteristics and mechanical properties of aluminum alloy 6061 workpiece produced by electric discharging machining process

Fabrication of an oil–water separation copper filter using laser beam machining

Underwater laser texturing for enhanced adhesive joint bonding strength of Al-Mg alloy

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