Sg. Pantelakis et al., ASSESSMENT OF INTRINSIC CREEP RESISTANCE EVOLUTION BASED ON THE RESULTS OF CONSTANT-LOAD CREEP TESTS, Steel research, 65(6), 1994, pp. 254-259
In the present study a method to assess the intrinsic creep resistance
evolution by using data of constant load creep tests is proposed. The
investigation has been performed on the austenitic steels X6 CrNi 16
11 and X8 CrNiMoNb 16 16. To develop the constitutive equation describ
ing the intrinsic creep resistance evolution a simple structural mecha
nical model has been used. The applied model is based on a modificatio
n of the Levy-Mises equation for plasticity to consider creep time eff
ects. The proposed model has been verified experimentally. The experim
ental creep resistance evolution curves have been derived with the aid
of strain transient dip test performed in transient, steady state and
accelerated creep stage.