Surface Integrity and the Influence of Tool Wear in High Speed Machining of Inconel 718
The influence of high speed turning and tool wear on the microstructure and residual stresses of Inconel 718 was investigated.The turning was performed using whisker reinforced alumina ceramic inserts and a cutting fluid.By electron channelling contrast imaging in SEM,significant microstructural changes,including grain-refinement in a thin surface layer and heavily deformed microstructure to a certain depth,were observed in turning using a new tool.X-ray diffraction measurements also revealed a characteristic residual stress field with surface tensile stresses and subsurface compressive stresses.With the development of wear in the tool flank,mechanical forces and heat involved in the cutting operation increased,leading to a much larger cutting affected zone and more drastic changes in the surface integrity.High surface tensile residual stresses,up to 1500 MPa,and dissolution of reinforcing precipitates and recrystallization of the surface layer were induced by severe tool wear,both of which can significantly affect the fatigue strength of the machined part.
High speed machining Surface integrity Residual stress Tool wear Inconel 718
Ru Lin Peng Jinming Zhou Sten Johansson Annethe Billenius Volodymr Bushlya Jan-Eric Stahl
Department of Management and Engineering,Link(o)ping University,58183 Link(o)ping,Sweden Department of Mechanical Engineering,Lund University,22100 Lund,Sweden
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）