• Nilabha Sankar Mitra
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Laser beam welding is a fusion welding process with high power density. In comparison with the arc welding process, laser beam welding produces high aspect ratio welds with a relatively low heat input. Laser welding can be performed out of vacuum and the fiber optic delivery of near infra red solid state laser beams provide increased flexibility compared with other joining processes. Laser welding can be used as a principal technique for joining aerospace metallic components. Hybrid MAG laser welding shows a great potential in shipbuilding industry for joining structural steels. Aerospace, shipbuilding and automobile industries are few of the major users of laser beam welding process. Low distortion, high welding speed and easy automation have taken this welding technology to a more advantageous position. Laser welding of glass enables producing joint structure, which is monolithic and possesses excellent mechanical strength, high temperature stability and space selectivity in comparison with prevailing joining processes without heating before or after the process. Most common materials of application of laser beam welding process are aluminium alloys and steel. The width of weld bead and depth of penetration are the major parameters that the laser beam welders wish to control. The processing conditions are selected based on the thickness of material. A common practice is to develop process parameters for a particular application based on an engineering approach using the system parameters such as laser power, travel speed. However in such a case the power is optimized for a particular system only. In this paper experimentations are conducted with associated analysis to find out the key influencing parameters in fiber laser welding of aluminium alloy AA7075, which is used in many applications. The four parameters selected are beam power, welding speed, gas flow rate and beam angle. L9 (34) orthogonal array is used for experimental plan and analysis using Taguchi method.

Fiber laser welding, bead width, depth of penetration, parametric analysis, Taguchi Method

"Parametric Analysis of Fiber Laser Welding of Aluminium Alloy AA7075", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 10, page no.d233-d242, October-2022, Available :http://www.jetir.org/papers/JETIR2210343.pdf

"Parametric Analysis of Fiber Laser Welding of Aluminium Alloy AA7075", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 10, page no. ppd233-d242, October-2022, Available at : http://www.jetir.org/papers/JETIR2210343.pdf