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The mechanical behaviour at room temperature of a single-crystal superalloy exposed to long-term ageing at elevated temperature has been investigated, a topic important for the material’s resistance to thermal–mechanical fatigue. Specimens with several different crystallographic orientations were plastically deformed in either tension or compression before and after the long-term furnace exposure...
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...
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