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An experimental study of geometrical characteristic in low power fiber laser drilling of Monel k-500 superalloy
摘要： Precise holes in advanced dif?cult to cut nickel-based superalloys can be drilled with ease by the method of ?ber laser drilling. Laser trepanned drilling has become more acceptable laser percussion drilling as it can produce better hole quality and generate macro or micro size hole. On the basis of geometrical quality feature like hole taper for drilling small diameter hole in dif?cult to cut Monel k-500 superalloy sheet laser trepanned drilling process performance studies have been made in the present research paper. The laser drilling has become a highly non-linear and complex process as there is involvement of different and large process parameters. Application of response surface methodology (RSM) has been made for attaining optimization by way of handling the non-linearity and complexity. Input process parameters like sawing angle, power setting, duty cycle, pulse frequency and trepanning speed have been used in this study. A well-designed experimental matrix has supplied essential data to ?nd out the in?uence of signi?cant process parameters on characteristic of the hole taper. Development of reliable empirical models has been achieved to relate different quality characteristic.
关键词： Hole taper,RSM,Laser trepan drilling,Monel k-500,Fiber laser
更新于2025-09-19 17:13:59
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Adaptive neuro-fuzzy inference system based modeling of recast layer thickness during laser trepanning of Inconel-718 sheet
摘要： Re-solidification of molten material during the laser trepanning of Inconel-718 is a major hindrance in achieving good quality drill with high precision and accuracy. Re-solidification affects the performance of the drilled hole. Many researchers have tried for the optimization of laser trepan drilling in order to improve the drilled hole quality characteristics. But till now, limited work has been reported in concern with recast layer formation in laser trepan drilling of Inconel-718. This paper experimentally investigated the recast layer formation during laser trepan drilling followed by the prediction of the recast layer formation using the adaptive neuro-fuzzy inference system (ANFIS). Experiments are performed on 1.4-mm-thick Inconel-718 sheet using pulsed Nd: YAG laser. Recast layer thickness has been measured for each experiment followed by the ANFIS-based prediction of recast layer. Moreover, the effect of different input parameters on the recast layer has also been discussed.
关键词： Recast layer,Laser trepan drilling,Adaptive neuro-fuzzy inference system,Inconel-718
更新于2025-09-11 14:15:04