Applied mechanics in grinding. Part 7. residual stresses induced by the full coupling of mechanical deformation, thermal deformation and phase transformation

In this final part of the series research on residual stresses in ground components, the full coupling of mechanical deformation, thermal deformation and phase transformation during grinding was investigated using the finite element method. It was found that all the components of surface residual stresses become tensile when phase transformation takes place. This phenomenon is independent of the cooling conditions and type of grinding operations and is affected only slightly by the variation of surface mechanical traction. The distribution of the residual stress in grinding direction is nearly linear in both the martensite and non-martensite zones. However, the location of the maximum residual stress is related to the surface mechanical traction and depth of martensite transformation. (C) 1999 Elsevier Science Ltd. All rights reserved.