Effect of abrasive flow machining parameters on internal surface roughness of aluminum alloy 2024 cylindrical workpieces
摘要
The internal surface integrity of Aluminum Alloy 2024 (AA2024) cylindrical parts are critical for fatigue performance, corrosion resistance and fluid flow efficiency in aerospace applications. Conventional finishing processes encounter limitations in achieving uniform refinement within confined internal passages. This study investigates the effects of number of cycles (NOC), extrusion pressure (EP) and abrasive mesh size on internal roughness and material removal during AFM of hollow cylinders. Results show a maximum roughness reduction of 89.69% with surface roughness reduced from an initial value of 0.368 μm Ra to as low as 0.194 μm Ra under optimized conditions and controlled percentage change in material removal (%ΔMR) from 1.3 to 1.83%. Extrusion pressure enhances asperity removal, cycle influence stabilizes beyond 150 cycles and 120 mesh abrasive provides optimal cutting-smoothing balance, confirming AFM.