Experimental study of Nd:YAG laser beam machining—An overview

Dubey, Avanish Kumar; Yadava, Vinod

doi:10.1016/j.jmatprotec.2007.05.041

Cited by 181 publications

(56 citation statements)

References 51 publications

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“…High power, high repetition rate pulse lasers with neardiffraction-limited beam quality have made significant contributions in many applications such as X-ray generation [1] , attosecond pulses generation [2] and material processing [3][4][5][6][7] . In particular, the performance of material precise processing varies largely due to different pulse durations.…”

Section: Introductionmentioning

confidence: 99%

High pulse energy fiber/solid-slab hybrid picosecond pulse system for material processing on polycrystalline diamonds

Chen

Liu

Song

et al. 2018

High Pow Laser Sci Eng

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We demonstrate an all polarization-maintaining (PM) fiber mode-locked laser seeded, hybrid fiber/solid-slab picosecond pulse laser system which outputs 40 µJ, 10 ps pulses at the central wavelength of 1064 nm. The beam quality factors M 2 in the unstable and stable directions are 1.35 and 1.31, respectively. 15 µJ picosecond pulses at the central wavelength of 355 nm are generated through third harmonic generation (THG) by using two LiB 3 O 5 (LBO) crystals, in order to get better processing efficiency on polycrystalline diamonds. The high pulse energy and beam quality of these ultraviolet (UV) picosecond pulses are confirmed by latter experiments of material processing on polycrystalline diamonds. This scheme which combines the advantages of the all PM fiber mode-locked laser and the solid-slab amplifier enables compact, robust and chirped pulse amplification-free amplification with high power picosecond pulses.

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Section: Introductionmentioning

confidence: 99%

High pulse energy fiber/solid-slab hybrid picosecond pulse system for material processing on polycrystalline diamonds

Chen

Liu

Song

et al. 2018

High Pow Laser Sci Eng

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“…Furthermore, the laser beam can heat the material to the evaporation point and the resulting material vapor escapes out of the hole. At this time, steam is formed and released; the waste comes out of the cavity and the molten walls around the cavity are formed (Parandoush et al, 2014, Jay Tu et al, 2014, Dubey et al, 2008 Ghoreishi and Nakhjavani (Ghoreishi et al, 2008) studied an ANN-based process model to find the relation between process parameters (pulse frequency, power, pulse width, number of pulses, assist gas pressure, and focal plane position (FPP)) and output parameters (hole entrance and exit diameters, circularity of hole entrance and hole exit, hole taper) of laser beam percussion drilling (LBPD) using the experimental results. Pulsed Nd:YAG laser source was used to drill the 304 steel sheets with the thickness of 2.5 mm.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Effects of Process Parameters on Laser Percussion Drilling Using Finite Element Methodology; Statistical Modelling and Optimization

Moradi

Golchin

2017

Lat. Am. j. solids struct.

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In the present research, the simulation of the Nickel-base superalloy Inconel 718 fiber-laser drilling process with the thickness of 1mm is investigated through the Finite Element Method. In order to specify the appropriate Gaussian distribution of laser beam, the results of an experimental research on glass laser drilling were simulated using three types of Gaussian distribution. The DFLUX subroutine was used to implement the laser heat sources of the models using the Fortran language. After the appropriate Gaussian distribution was chosen, the model was validated with the experimental results of the Nickel-base superalloy Inconel 718 laser drilling process. The negligible error percentage among the experimental and simulation results demonstrates the high accuracy of this model. The experiments were performed based on the Response Surface Methodology (RSM) as a statistical design of experiment (DOE) approach to investigate the influence of process parameters on the responses, obtaining the mathematical regressions and predicting the new results. Four parameters i.e. laser pulse frequency (150 to 550 Hz), laser power (200 to 500 watts), laser focal plane position (-0.5 to +0.5 mm) and the duty cycle (30 to 70%) were considered to be the input variables in 5 levels and four external parameters i.e. the hole's entrance and exit diameters, hole taper angle and the weight of mass removed from the hole, were observed to be the process output responses of this central composite design. By performing the statistical analysis, the input and output parameters were found to have a direct relation with each other. By an increase in each of the input variables, the entrance and exit hole diameters, the hole taper angel, and the weight of mass removed from the hole increase. Finally, the results of the conducted simulations and statistical analyses having been used, the laser drilling process was optimized by means of the desire ability approach. Good agreement between the simulated and the optimization results revealed that the model would be appropriate for laser drilling process numerical simulation.

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“…In LBW process, high energy density laser beam on incidence upon a work piece surface, transfer its thermal energy and melts a small amount of work piece material to create a fusion joint on solidification. CO 2 and Nd:YAG laser sources are most widely used in modern industries [6], [7], [8]. However, due to its unique characteristics, Nd:YAG laser processing of material is still a very attractive area of investigation for researchers.…”

Section: Introductionmentioning

confidence: 99%

Review on experimental study of Nd:YAG laser beam welding, with a focus on aluminium metal matrix composites

Banerjee¹,

Biswal²,

Lohar³

et al. 2016

IJET

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The demand for high performance materials particularly in aviation and automobile industries gradually increases, CO 2 and Nd: YAG lasers are becoming most popular in processing these advanced materials. In this context, one of the most important process is joining by welding. It has been a constant endeavour by researchers to explore various methods and techniques to enhance the process efficiency of autogenous Nd: YAG laser welding of various materials i.e. without any filler materials. In this work, we present a comprehensive review of major research findings for the last decades or so, obtained by researchers about the effect of process parameters on autogenous laser beam welding (LBW) process performance. Main objective of such experimental research was to improve laser weld quality such as tensile strength, weld micro structure, heat affected zone (HAZ), weld penetration etc. In this paper, discussions are also made about different parameter optimisation techniques, design of experiments (DOE), modelling and simulation techniques, adopted by different researchers to achieve optimum weld quality. This review tries to bring out a foresight for direction of further research needed in this field.

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Experimental study of Nd:YAG laser beam machining—An overview

Cited by 181 publications

References 51 publications

High pulse energy fiber/solid-slab hybrid picosecond pulse system for material processing on polycrystalline diamonds

High pulse energy fiber/solid-slab hybrid picosecond pulse system for material processing on polycrystalline diamonds

Investigation on the Effects of Process Parameters on Laser Percussion Drilling Using Finite Element Methodology; Statistical Modelling and Optimization

Review on experimental study of Nd:YAG laser beam welding, with a focus on aluminium metal matrix composites

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