Laser material processing

Abstract Light amplification by stimulated emission of radiation (laser) is a coherent and monochromatic source of electromagnetic radiation that can propagate in a straight line with negligible divergence. As a result, laser finds diverse applications ranging from mere mundane to most sophisticated uses either for totally commercial or purely scientific purposes, and from life saving to life threatening causes. High power lasers can produce intense heating and perform various manufacturing operations or material processing. The present contribution provides an overview of the application of high power laser only for material processing in engineering applications, and intentionally excludes the scope of application of laser in metrology, biomedical technology, spectroscopy, etc. The manufacturing processes covered have been broadly divided into four major categories, namely, laser assisted forming, joining, machining and surface engineering. Besides discussing the scope and principle of these processes, each section enumerates a detailed update of literature, scientific issues and technological innovations. At the beginning, a brief introduction to different types of lasers and their general applications, fundamentals of laser–matter interaction and classification of laser material processing has been provided. The entire discussion primarily focuses on correlating the properties with processing parameters and microstructure and composition of the material.

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