International Journal of Engineering, Applied and Management Sciences Paradigms (IJEAM) Special Issue- CIMAESS 2019 196 ISSN 2320-6608 Review on Parametric Studies of Laser Beam Machining Process Yogita Sharma 1 , Martin Amar Raj 2 , Ramesh Chandra Panda 3 , Kamini Parashar 4 1 Research scholar, Mechanical Engineering, Guru kashi university, Talwandi Sabo (Bathinda), 2 B.Tech 4th year student , school of Mechanical Engg,Lingaya’s Vidyapeeth,Faridabad, Haryana, india 3 Assistant Professor (Mechanical Engg), Dept. of Mechanical Engg, Lingaya’s Vidyapeeth, Faridabad (HRY), India 4 Incharge and Academic Coordinator, DWPS, Astha, Bhopal, M.P. Abstract: LASER stands for Light Amplification by Stimulated Emission of Radiation. Laser-beam machining is a modern, subtractive, thermal material-removal process that utilizes a high-energy, coherent, high intensity beam of light beam to melt and vaporize particles on the surface of metallic and non-metallic workpieces. Lasers can be used to cut, drill, weld and mark and to make complex job profiles which requires accuracy and precision. Laser also has many medical uses (like in dental industry, surgery, cancer treatment, etc.). This modern technology is finding ways to integrate into daily life with a purpose of easing our work. The main aim of this paper is to study briefly about Laser Beam Machining with parameters included as this paper touches the very key points of working, existence, uses, types and their usage with their respective lifespan. Keywords: Excitation; Energy source; Feedback mechanism; Heat Affected Zone (HAZ); Kerf; Surface Roughness I. INTRODUCTION: Laser-beam machining is a non-traditional, subtractive, thermal material-removal process that utilizes a high-energy, coherent light beam to melt and vaporize particles on the surface of metallic and non-metallic workpieces. Lasers can be used to cut, drill, weld and mark [1] [2]. LBM is particularly suitable for making accurately placed holes. LBM uses the light energy (focused coherent beam of monochromatic light) to remove material by vaporization and ablation (evaporation or melting of a surface through heating by friction).The light energy is pulsed so that the released energy results in an impulse against the work surface that produces a combination of evaporation and melting with the melted material evacuating the surface at high velocities. Laser beams are being used for a variety of industrial applications, including heat treatment, welding, and measurement as well as cutting, drilling, slitting, slotting, marking operations, scribing. It does not involve mass material removal but does provide rapid material removal with an easily controlled non-contact, non-wearing tool. II. LITERATURE REVIEW In the year 2003; in the month of March, Giovanni Tani, Luca Tomesani, Giampaola Campana published a paper on ―Prediction Of Melt Geometry In Laser Cutting‖ to find an analytical model for the evaluation of the melt film geometry in laser cutting of steels is developed. In the year 2004; in the month of April, Giovanni Tani, Luca Tomesani, Giampaola Campana, Alessandro Fortunato published a paper on ―Quality Factors Assessed By Analytical Modelling In Laser Cutting‖ to find striation and dross formation are analysed by means of an analytical model which, by considering mass, force and energy balances, evaluates the 3D geometry of the cutting front, and the geometry and temperature fields of the melt film. Figure (1): A Picture of a Fibre Laser Beam Machine doing a complex decoration job.