The influence of the constitutive behaviour of materials on the formability in radial extrusion of tubular components

摘要

In the present work the flow of the metal in the radial extrusion of tubular components is analysed.Different strain-hardening behaviours are used in a commercially-available finite-element code,giving remarkably different flow behaviour of the metal. The finite-element simulations are verifiedby metal experiments. The creation of unsound components is explained from the flow behaviour ofthe metal due to an inhomogeneous flow followed by a difference in the strain hardening of differentregions of the component. Based on the results obtained the features in producing sound radialextruded components are reviewed.