Parametric study of CO2 laser drilling of carbon nanopowder/vinylester/glass nanocomposites using design of experiments and grey relational analysis

Nagesh, Suresh; Murthy, H.N. Narasimha; Krishna, M.; Basavaraj, H. G.

doi:10.1016/j.optlastec.2012.11.013

Cited by 28 publications

(16 citation statements)

References 20 publications

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“…Deep holes with small diameters can be drilled with little thermal or mechanical damage to the material. Literature suggests that laser drilling is an alternative for attaining good quality micro-holes [4][5][6][7][8]. Several process-related parameters generally influence the quality of holes.…”

Section: Introductionmentioning

confidence: 99%

“…Brajdic et al [7] have investigated the effect of laser drilling parameters on hole quality in deep drilling of through holes made on stainless steel with the superposed radiation of two pulsed Nd:YAG lasers. Nagesh et al [8] have directed their efforts in improving the quality of laser-drilled holes in thermoset-based composites. The results indicate that the HAZ can be reduced by employing low laser power whereas taper angle can be reduced by adopting high laser power.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive literature review reveals that few attempts have been made on micro-drilling of Ti6Al4V using laser and use of CO 2 laser to machine metallic alloys. However, CO 2 laser is preferable for drilling of composites and plastic materials [1,[8][9][10][11][17][18][19][20][21]. Some studies have used CO 2 laser for drilling of alloys such as alumina and aluminium composites [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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An experimental study on drilling of titanium alloy using CO2 laser

et al. 2018

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Laser drilling is a popular method as it eliminates the problem of chatter and vibration due to the absence of physical contact between the tool and workpiece. Tool breakage, a common phenomenon that occurs due to bending of the tool in making of slender holes using conventional drilling, can also be avoided. However, quality of the hole measured in terms of circularity, taper and spatter area is the major concern during laser drilling. The present investigation attempts to find out the optimum parametric setting during drilling of Ti6Al4V using CO 2 laser in order to achieve quality holes. Experiments have been conducted to assess the influence of machining parameters, viz. flushing pressure, laser power and pulse frequency, on the performance characteristics such as taper of kerf, heat-affected zone (HAZ) and spatter area. Taguchi's L 9 orthogonal array has been used to design the experimental layout as it reduces the experimental cost and time. Analysis of variance has been performed to assess the effect of machining parameter on the performance characteristics. It has been observed that laser power has significant influence on taper of kerf, HAZ and spatter area. Based on desirability approach, the study suggests that all the performance characteristics can be simultaneously optimized at flushing pressure of 40 Pa, laser power of 2250 W and pulse frequency of 1600 Hz. The study also presents a numerical model to simulate the laser drilling process. Since comparison of experimental and numerical model shows a relative error within 10%, adequacy of the numerical model for assessment of quality characteristics of laser drilled holes is justified.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An experimental study on drilling of titanium alloy using CO2 laser

et al. 2018

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“…Laser machining is promisingly attractive in the processing of the carbon fiber reinforced polymer (CFRP) composites considering its potential advantages over the mechanical techniques [1,2,3]. As we know, the efficiency and reliability of Laser machining is determined by the interactions between the Laser beam and the processed materials [4].…”

Section: Introductionmentioning

confidence: 99%

“…As we know, the efficiency and reliability of Laser machining is determined by the interactions between the Laser beam and the processed materials [4]. To improve the quality of Laser machining in the composites, the heat affected zone and taper angle need to be controlled by particularly designing the Laser parameters [1,2]. Previously, the different ablation behaviors were investigated on the CFRP laminates subject to Laser of typical operation modes, i.e.…”

Section: Introductionmentioning

confidence: 99%

Interaction between pulsed infrared laser and carbon fiber reinforced polymer composite laminates

Liu¹,

Wu²,

Song³

et al. 2016

SPIE Proceedings

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Abstract:The Laser drilling processes, in particular the interaction between the pulsed infrared Laser and the target materials were investigated on the CFRP composite laminate. The incremental freezing method was designed to reveal experimentally the temporal patterns of the ablation profiles in the CFRP composite laminates subjected to pulsed Laser irradiation. The temperature characteristics of the specimens were analyzed with Finite Element Method (FEM) and the phase change history studied. The theoretical results match well with the experimental outcome.

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