Spectroscopic study of Inconel 718 plasma generated during laser drilling process

2009 ◽  
Author(s):  
Joonghan Shin ◽  
Jyoti Mazumder
Keyword(s):  
Spectroscopic Study ◽  
Inconel 718 ◽  
Laser Drilling ◽  
Drilling Process

scholarly journals Particle Swarm Optimisation of Hole Quality Characteristics in Laser Trepan Drilling of Inconel 718

2019 ◽  
Vol 69 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Kedari Lal Dhaker ◽  
Arun Kumar Pandey
Keyword(s):  
Inconel 718 ◽  
Input Parameter ◽  
Particle Swarm ◽  
Quality Characteristics ◽  
Laser Drilling ◽  
Particle Swarm Optimisation ◽  
Drilling Process ◽  
Hole Quality ◽  
Geometrical Features ◽  
Laser Trepan Drilling

Inconel-718 is a nickel based super alloy and is extensively in use for working at very high temperature (upto 2000 °C) such as aero engine gas path equipment, nuclear equipment etc. Drilling micro size hole in such material with laser beam has been a proven choice and laser drilling process produces geometrically and dimensionally improved hole. Hole geometrical features can be improved further if laser drilling system operated at optimal input parameter setting. This paper experimentally investigates the behavior of hole geometrical features hole circularity and hole taper in laser trepan drilling of Inconel -718 sheet. Optimal value of laser input parameters for improved hole circularity and reduced hole taper have been suggested with the help of computational intelligence technique particle swarm optimisation. The effect of each laser input parameter on hole quality characteristics are also discussed and demonstrated graphically. Finally the experimental validation of the predicted results has been carried out.

scholarly journals Analysis and optimization of laser drilling process during machining of AISI 303 material using grey relational analysis approach

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
V. Chengal Reddy ◽  
Thota Keerthi ◽  
T. Nishkala ◽  
G. Maruthi Prasad Yadav
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Grey Relational Analysis ◽  
Pulse Frequency ◽  
Laser Drilling ◽  
Simultaneous Optimization ◽  
Fibre Laser ◽  
Drilling Process ◽  
Relational Analysis ◽  
Grey Relational

AbstractSurface roughness and heat-affected zone (HAZ) are the important features which influence the performance of the laser-drilled products. Understanding the influence of laser process parameters on these responses and identifying the cutting conditions for simultaneous optimization of these responses are a primary requirement in order to improve the laser drilling performance. Nevertheless, no such contribution has been made in the literature during laser drilling of AISI 303 material. The aim of the present work is to optimize the surface roughness (Ra) and HAZ in fibre laser drilling of AISI 303 material using Taguchi-based grey relational analysis (GRA). From the GRA methodology, the recommended optimum combination of process parameters is flushing pressure at 30 Pa, laser power at 2000 W and pulse frequency at 1500 Hz for simultaneous optimization of Ra and HAZ, respectively. From analysis of variance, the pulse frequency is identified as the most influenced process parameters on laser drilling process performance.

scholarly journals Significant Reduction in Energy Consumption and Carbon Emission While Improving Productivity in Laser Drilling of CFRP Sheets with a Novel Stepped Process Parameter Parallel Ring Method

2022 ◽  
Vol 6 (1) ◽  
pp. 7
Author(s):  
Menghui Zhu ◽  
Chao Wei ◽  
Wei Guo ◽  
Zhizhou Zhang ◽  
Jinglei Ouyang ◽  
...  
Keyword(s):  
Ring Laser ◽  
Energy Input ◽  
Processing Parameters ◽  
Laser Drilling ◽  
Parent Material ◽  
Hole Drilling ◽  
Drilling Process ◽  
Cfrp Sheets ◽  
Hole Drilling Method ◽  
Drilling Quality

Although laser drilling of carbon fibre-reinforced polymer (CFRP) composites offers the advantages of zero tool-wear and avoidance of fibre delamination compared with mechanical drilling, it consumes considerably more energy during the drilling process. This research shows that by using a new, stepped parameter parallel ring laser hole drilling method, an energy saving of 78.10% and an 18.37 gCO2 reduction for each hole, while improving productivity by more than 300%, can be achieved in laser drilling of 6 mm diameter holes in CFRP sheets of 2 mm in thickness, compared with previous laser drilling methods under the same drilling quality. The key reason for this is an increase in energy input to the inner rings enabling more rapid removal of the material, while the lower energy input for the outer ring provides a shielding trench to reduce the heat loss into the parent material. The results are compared with single-ring laser drilling and multiple-ring laser drilling with constant processing parameters, and a discussion is given on comparing with mechanical drilling and future prospects, including a combined mechanical drilling and laser pre-scribing process.

Laser drilling process of Fe78Si9B13 amorphous alloy foil

2020 ◽  
Vol 565 (1) ◽  
pp. 77-87
Author(s):  
Chuanjie Wang ◽  
Haiyang Wang ◽  
Gang Chen ◽  
Lingjiang Cui ◽  
Peng Zhang
Keyword(s):  
Amorphous Alloy ◽  
Laser Drilling ◽  
Drilling Process ◽  
Alloy Foil

Characterizing the laser drilling process of oil shale using laser-induced voltage

2020 ◽  
Vol 131 ◽  
pp. 106478
Author(s):  
Shanzhe Zhang ◽  
Jianfeng Huang ◽  
Xinyang Miao ◽  
Honglei Zhan ◽  
Huaqing Liang ◽  
...  
Keyword(s):  
Oil Shale ◽  
Laser Drilling ◽  
Drilling Process ◽  
Induced Voltage

A Combined CFD, ANFIS and NSGA-II Model for Repetitive Pulse Laser Drilling Process

2020 ◽  
Vol 7 (4) ◽  
pp. 449-477
Author(s):  
S. Sukumar ◽  
S. P. Kar ◽  
A. Swain ◽  
R. K. Sarangi ◽  
P. C. Sekhar
Keyword(s):  
Pulse Laser ◽  
Laser Drilling ◽  
Drilling Process ◽  
Nsga Ii

scholarly journals Energy Efficiency Assessment of Laser Drilling Process

2012 ◽  
Vol 39 ◽  
pp. 776-783 ◽  
Author(s):  
Fysikopoulos Apostolos ◽  
Stavropoulos Panagiotis ◽  
Salonitis Konstantinos ◽  
Chryssolouris George
Keyword(s):  
Energy Efficiency ◽  
Laser Drilling ◽  
Drilling Process ◽  
Efficiency Assessment
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