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| Research Acitivities |
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Grain Interaction Models for Residual Stresses
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The evaluation of residual stresses in polycrystalline materials requires models for the grain interaction. The development of new models for thin layers takes into account the anisotropy of the elastic properties, the (often columnar) microstructure and the crystallographic texture.
Lattice strain(ε-)sin2ψ plot (ψ= angle of tilt of specimen) for the (004) reflection from a 500 nm thick sputtered Cu layer with (111) fibre texture: measured by X-ray diffraction · and simulated for a stress of σ|| = 180 MPa in the layer using different models for the grain interaction. ...... Voigt model, - - - Reuss model, ____ new model for anisotropic grain interaction.
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