Investigation of the physical parameters of long-time fracture of pure polycrystalline nickel at temperatures above 0.45 Tm (where Tm is the melting point)

Abstract

Parameters of long-time fracture of high-purity nickel at temperatures above 0.45 Tm and stresses higher than 3 kg/mm2 were studied. Our own and published experimental data was used to postulate an integration of the physical meaning of the coefficientβ and of the activation energy for steady-state creep and long-time fracture. A graphical method of determining the activation energy for creep was developed, in which the temperature dependence of elastic constants is taken into account.