Constitutive equations describing creep curve of a statically aged Mod.9Cr-1Mo steel

Abstract

The creep behavior of a Mod.9Cr-1Mo steel statically aged under various conditions was analyzed using the Omega method between 873 and 948 K, and between 100 and 10000 h, respectively. The behavior of primary creep was approximated by a logarithmic creep equation. Creep life was also estimated from a knowledge of imaginary initial creep rate. In general, the calculated creep life from the modified Omega method agreed well with the measured one.