602 Microstructure and residual stress distribution in an Enlarging Partial Diameter part

Abstract

Stress distribution within a S45C steel part plastically formed by a new technique "Enlarging Partial Diameter" and simple compression one were studied with neutron and X-ray diffractions. Because of texture evolution, an angular dispersion method was not easy to select a suitable hkl diffraction while a time-of-flight method was more appropriate to determine stress distribution within a deformed region. It is found that compression stresses remained in the center of the deformed rod and its magnitude is larger in the simple compression than in the Enlarging Partial Diameter sample. On the other hand, tensile stresses were remained on the surface along the axial and hoop direction and their magnitudes were a little higher in the Enlarging Partial Diameter sample.