Wear mechanisms taking place during machining strongly affect the overall process reliability, product quality, and production costs. It is necessary to have useful monitoring techniques for monitoring the wear trend during the process and to identify wearing phenomena occurring during the evolution of the process. In order to get a reliable tool, it is necessary to identify and distinguish the contributing factors and wear mechanisms happening during machining. In this paper, an acoustic emission sensor has been used to identify characteristic features pertaining different wear mechanism displayed during turning of waspaloy. The methodology used to distinguish the contributing elements was developed coupling turning tests with corresponding tribological experiments so that clear evidences on different contributions were identified showing a useful tool for industrial and research applications.