Experimental investigation of cutting tool geometry effect on residual stress in turning of St316

Cutting tool geometry has a direct effect on residual stress. In this study, in order to evaluate toolgeometry effect on the magnitude of residual stress, nose radius is selected as a variant of tool geometry. Workpiecematerial is low carbon stainless steel 316L. TMCT tool is used for machining of this austenitic stainless steel. Grade fortools is GC1125, suitable for machining of AISI316L. Tests are performed under various cutting speed and feed rate.All tests are implemented in orthogonal machining. Annealing has been performed prior to turning in order to achieveuniform microstructure. Residual stresses are measured by X-ray diffraction method. Lower magnitudes ofcompressive stress have been observed in smaller nose radius (0,2mm) cutting tool. In the meantime, the lower rate oftensile stress has been observed in smaller nose radius cutting tool. Conclusively, smaller tool nose radius has a directeffect on lower amounts of residual stress.

کلیدواژه ها:

Tool Geometry ، Residual Stress ، Stainless Steel 316L ، Turning