Grinding-induced microstructural gradients and residual stresses in the surface layers of carbon steel and pure tungsten

Abstract

Abstract Flat samples of AISI 1080 carbon steel and commercially pure tungsten were surface-treated using a reciprocating table-type grinding machine. Cross sections of the subsurface microstructure induced by this mechanical finishing process were prepared and imaged by focussed ion beam methods. Depth profiles of the residual normal and shear stresses were analysed using synchrotron X-ray diffraction and correlated to the observed microstructural gradients. The stress partitioning between the hard cementite and the soft ferrite phases in the ground steel samples is discussed in detail.