Constitutive Model for Anisotropic Creep Behaviors of Single-Crystal Ni-Base Superalloys in the Low-Temperature, High-Stress Regime (Postprint).

摘要

A crystallographic constitutive model is developed to capture orientation-sensitive primary and secondary creep behaviors within approximately 20 deg from the [0 0 1] orientation in single crystal superalloys for the low-temperature and high-stress regime. The crystal plasticity-based constitutive formulations phenomenologically incorporate experimentally observed dislocation micromechanisms.