An analysis of creep deformation parameters. Part 2: experimental study

An experimental study was conducted to evaluate some creep crack growth deformation parameter forms. These forms, which have been developed Part 1 of this paper, include both the C∗ and Ct parameters and the ETM δ5 based parameters. The evaluation was conducted with a Mg alloy, AZ31, which exhibited creep behavior at 150 °C. Both smooth tensile specimens and notched and precracked fracture mechanics specimens were tested. sults showed that the separation form of the equation appears to be experimentally validated. Therefore, using the forms for creep deformation parameters that have been taken from similar formats for elasticity and plasticity is justified. In addition, some of the creep deformation parameters are evaluated experimentally. Estimates of the forms are compared with measured values. The results here are only for the compact fracture mechanics specimen geometry.