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Hard and brittle materials (HBMs) are increasingly valued for their outstanding mechanical and functional properties, making them ideal for high-end applications. However, their inherent hardness and low fracture toughness present significant challenges in machining, often leading to surface damage, increased tool wear, reduced service life , and elevated production costs. Acoustic emission (AE) monitoring has emerged as a promising solution to these challenges by providing real-time insights into grinding process. With broad frequency range and exceptional resolution, AE monitoring captures critical events such as material removal, wheel wear, and contact conditions, thereby enhancing machining accuracy, extending tool life, and improving surface integrity. Our review explores the state of the art in AE monitoring for grinding HBMs, focusing on its fundamental principles, signal processing techniques , and specific applications. By elucidating these aspects, the review concludes by outlining future trends and potential research directions to address existing gaps and advance the field further .
Fan et al. (Thu,) studied this question.