Room temperature yield behaviour of a single-crystal nickel-base superalloy with tension/compression asymmetry

The constitutive behaviour at room temperature of a single-crystal nickel-base superalloy is presented in a new model. This model is based on crystal plasticity and takes Schmid- as well as non-Schmid stresses, elastic anisotropy and tension/compression asymmetry into account. By comparison with uniaxial tensile and compressive tests, the model is shown to reproduce the real behaviour well, including the tension/compression asymmetry. The model also shows that typically encountered deviations in orientations of castings have a non-negligible influence on stiffness and yield limit, which must be taken into account for industrial applications.