INJECTION FORGING OF TUBULAR MATERIALS - A WORKABILITY ANALYSIS

A comprehensive investigation of the double-sided injection forging of tubular components has been performed in order to determine the worka bility limits and identify the possible defects of the process. The wo rk was performed using finite-element modelling in conjunction with me tal experiments in aluminum. Workability failures during inject-ion fo rging are classified and related to the velocity field and the distrib ution of stress, strain and strain rate within the components. Correla tion with the microscopic nature of the material during processing is exploited by means of transmission electron microscopy. (C) 1997 Elsev ier Science S.A.