Abstract
The study was focused on the machined surface quality of titanium alloy under different milling conditions, including milling speed, tool rake angle and cooling method. The surface quality was investigated in terms of residual stress and surface roughness. The results show that the compressive residual stresses are generated on the machined surface under all milling conditions. The compressive residual stresses in both directions decreased and the surface roughness increased with the milling speed increasing. The compressive residual stresses increased with the tool rake angle increasing. The lowest surface roughness was obtained when the rake angle was 8 . Under the condition of dry milling, the highest compressive residual stresses were obtained, approximately 350 MPa. The highest surface roughness was obtained when the oil mist coolant was used. Water cooling was the best cooling method with uncoated cemented carbide tool in high-speed milling of titanium alloy.
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