S1108-4-1 Development of High Temperature and High Speed Torsion Test Rig for Viscoplasticity Parameter Identification

Abstract

Viscoplastic parameters are required to simulate such a hot forging process and creep failure. These phenomem greatly depend on viscoplastic behavior of materials. The present paper describes a developed test rig which enables the viscoplastic parameters of metals to be identified. In the test, a hollow circular bar is twisted under the maximum bai temperature of 1473 K and the maximum strain rate of 10 s^<-1>, and the angle of torsion and applied torque are mesured The viscoplastic parameters can be evaluated from the relationship between them.