Pooya Bahrami - Department of Mechanical Engineering, Kermanshah Science and Research Branch, Islamic Azad University, Kermanshah, Iran
Ali Khoshanjam - Department of Mechanical Engineering, Kermanshah Science and Research Branch, Islamic Azad University, Kermanshah, Iran
Abdolhamid Azizi - Department of Engineering, Ilam University, Ilam, Iran

In this study, Rotational Chemical Machining (RCM) as a novel machining process is introduced. The properties such as surface roughness and residual stress as well as fatigue strength of the RCM process are evaluated, discussed and compared to the conventional turning process. In this sense, Scanning Electron Microscope (SEM) and Atomic Force Microscope (AFM) were utilized. The results show the superiority of the RCM method over the conventional method and eliminate limits of process such as low surface quality and improve fatigue strength. The Amplitude Distribution Curve has a balanced Gaussian shape in RCM indicating the balanced distribution of peaks and valleys on machined surface. Due to the absence of machining force in the RCM process, in comparison to the turning process, maximum residual stress is significantly decreased from ۳۶۳Mpa to ۷۱Mpa; surface roughness reduced from ۳.۱µm to ۱.۵ µm as well as the fatigue strength improved ۲۰% approximately.

Fatigue strength, Hybrid Micromachining Process, Residual stress, Surface Roughness