The Study of Plastic Deformation at High Strain Rates in Upset Forging of Cylinders

Abstract

This paper presents a method for acquiring true stress–strain curves using engineering strain curves obtained from upset forging of cylindrical specimens. The main problem deals with determination the true strain in upset hot forging on hummers when the values of strain rates are differ in the range from 0 to 10 -3 s. At such strain rates due to wave processes strain distribution in cylindrical specimen will be uneven. The purpose of this publication is to analytically determine the strain distribution in compressed cylindrical specimen.