Nd–YAG laser machining of SiC fibre/borosilicate glass composites. Part I. Optimisation of laser pulse parameters

Tuersley, Ian; Hoult, Tony; Pashby, I. R.

doi:10.1016/s1359-835x(98)00017-7

Cited by 21 publications

(1 citation statement)

References 7 publications

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“…They found considerable surface roughness on the wall of the hole due to the difference in evaporation temperature between resin and fiber. Tuersley et al 20 machined a composite made up of borosilicate glass matrix and SiC fibers with the help of a pulsed Nd:YAG laser of maximum power of 400 W.They found that the material removal rate (MRR) was greatly affected by maximum laser power and pulse energy had a greater influence than the pulse duration. They have also conducted experiments by using various assist gases with different pressures and suggested to avoid oxygen as assist gas because it oxidizes the molten matrix material.…”

Section: Introductionmentioning

confidence: 99%

Fiber laser processing of GFRP composites and multi-objective optimization of the process using response surface methodology

Sethi

Das

2018

Journal of Composite Materials

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In the present investigation, a continuous wave fiber laser with maximum power of 400 W was used to cut a glass fiber reinforced plastic sheet of 4.56 mm thickness using Nitrogen as assisting gas. The influence processing parameters such as laser irradiance, gas pressure, and cutting speed on the cut surface quality were investigated by using response surface methodology. The different responses of laser cut surface such as upper kerf width, taper percentage along the cut depth, and heat-affected zone on the top surface were measured to analyze the influence of input process parameters on the responses. A statistical analysis on the obtained results was conducted and found that the optimum values of different input process parameters were laser irradiance: 8.28 × 105 watt/cm2, cutting speed: 600 mm/min and assisting gas pressure: 7.84 bar. The corresponding values of responses were upper kerf width: 177.4 µm, taper 0.73%, and heat-affected zone on top surface: 109.23 µm. The confirmation experiments were conducted with the obtained optimum parameter setting and observed that the predicted values and experimental values for upper kerf width, taper percentage and top surface heat-affected zone were within the error limits of 2.52%, 1.84%, and 0.45%, respectively. Furthermore, damages like loose fibers, interlayer fractures, evaporation of matrix material and fiber breakages were observed.

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Section: Introductionmentioning

confidence: 99%