Laser ablation of titanium alloy under a thin and flowing water layer

Tangwarodomnukun, Viboon; Likhitangsuwat, P.; Tevinpibanphan, O.; Dumkum, Chaiya

doi:10.1016/j.ijmachtools.2014.10.013

Cited by 91 publications

(33 citation statements)

References 26 publications

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“…Crater and nanostructures in the ambient of air and water are experienced through a research conducted in Patel et al [23] on brass and aluminum work samples. Another comparison of laser ablation performance under air and water ambience has been documented in Tangwarodomnukun et al [24] where microgrooves are machined. It is proven that the clean and lessdamaged cut can be achieved using flowing water layer.…”

Section: Introductionmentioning

confidence: 99%

A comparison of laser beam machining of micro-channels under dry and wet mediums

Darwish

Ahmed

Alahmari

et al. 2015

Int J Adv Manuf Technol

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Micro-channels have been fabricated in nickelbased superalloy (Inconel 718) through laser beam machining (LBM). Two machining mediums are employed: dry and wet medium. Under the dry medium, laser beam passes through air prior to strike with target surface while under wet medium, the laser beam first travels through a layer of distilled water and reaches the substrate after. For both the machining environments, effects of laser power, pulse repetition rate, and laser scan speed on machined channels' width, depth, and taperness are investigated. A comparison of parametric effects on machined channels' profiles has been carried out for the said machining conditions. The results reveal that LBM under distilled water is more productive than LBM under air environment. In one step, wet machining conditions allow to generate a set of two microchannels, and dry conditions generate one micro-channel. Further, to achieve the optimum dimensions of micro-channels, the appropriate level of each of the investigated laser parameter is proposed.

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Section: Introductionmentioning

confidence: 99%

A comparison of laser beam machining of micro-channels under dry and wet mediums

Darwish

Ahmed

Alahmari

et al. 2015

Int J Adv Manuf Technol

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“…Water is normally used to assist the process due to its high thermal conductivity, recyclability and cheap. The whole workpiece or only the surface of workpiece to be ablated by laser has to be submerged in water [1][2][3][4][5] or covered by a layer of water [4,6,7], where the laser ablation takes place in the confined volume of water. Since water can exponentially absorb the energy of laser with its travelling distance in water regarding the Beer-Lambert's law, the water layer has to be thin enough to cause less loss of laser intensity.…”

Section: Introductionmentioning

confidence: 99%

“…However, the water layer must not be too thin to quickly vaporize and leave the workpiece surface unshielded to the deposition of hot cut debris during the ablation. Tangwarodomnukun et al [6] proposed a technique to create a thin and stable water film continuously flowing over the work surface with the aid of waterjet impingement. By using this method, the water film can provide more effective flushing of cut debris and cooling of workpiece than the typical underwater technique.…”

Section: Introductionmentioning

confidence: 99%

“…By using this method, the water film can provide more effective flushing of cut debris and cooling of workpiece than the typical underwater technique. Dowding and Lawrence [7], Tangwarodomnukun et al [6] and Charee et al [5] noted that under a certain flow velocity, the laser-molten material can be removed by the kinetics of water flow, thus decreasing the recast formation and increasing the material removal rate. Based on the literature search, the investigations of underwater laser machining process are mostly accounted for cutting and grooving operations, while a more complicated ablation such as milling process has a very little discussion.…”

Section: Introductionmentioning

confidence: 99%

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Cavity formation and surface modeling of laser milling process under a thin-flowing water layer

Tangwarodomnukun

2016

Applied Surface Science

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“…Disadvantages of these methods [16] are high mechanical and thermal loads on the manufactured tool. Another non-conventional method is laser beam machining [10,17]. These techniques require special tools and machines and therefore the manufacturing of micro-ECM tools is elaborate and expensive.…”

Section: Introductionmentioning

confidence: 99%

Replication of microstructured tools for electrochemical machining applications

Weißhaar

Weinmann

Jung

et al. 2015

Int J Adv Manuf Technol

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Electrochemical machining (ECM) is a powerful method to machine metals independently of their mechanical properties. Micro-sized structures can be formed with high precision. For this purpose, it is necessary to manufacture tools with adequately fine structures. Conventional ECM tools were manufactured by micro-drilling, -milling, -turning, etc. Depending on the complexity of the structures, these techniques are very elaborate and expensive. Recently, a new procedure, which combines photolithography and electroforming, the so-called PhoGaTool process (photolithographic electroforming of ECM tools), was published. In the present work, we demonstrate how this method can also be used for copying ECM tools that were conventionally manufactured. A copy of an industrial PECM tool (precise electrochemical machining) was manufactured and used for the structural characterization and determination of the replication accuracy. The electroforming parameters like deposition conditions, bath composition as well as physical and chemical parameters were optimized for model systems. The inclusion of bath additives in the metal matrix during the deposition leads to micro-stresses, hence in this contribution, an alternative additive-free electrolyte was used. The accuracy of the process was investigated by means of confocal laser scanning microscopy. Average deviations of the structure depth and the lateral structure dimensions are in the range of 5 %.

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Laser ablation of titanium alloy under a thin and flowing water layer

Cited by 91 publications

References 26 publications

A comparison of laser beam machining of micro-channels under dry and wet mediums

A comparison of laser beam machining of micro-channels under dry and wet mediums

Cavity formation and surface modeling of laser milling process under a thin-flowing water layer

Replication of microstructured tools for electrochemical machining applications

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