Residual stress analysis for materials with depth gradients of the strain free / independent lattice parameter d0
Within this project a basic understanding on the effect of chemical gradients on the local strain free or strain independent lattice parameter will be gained. The systematic experimental approach will be the basis to extend the numerical approaches to correct for the surface effect for through surface strain scanning to material states with gradients in the chemical composition, i.e. we aim at providing an approach for the reliable modelling of the surface effects for materials states with chemical gradients in the near surface region, corporately a measuring and evaluation strategy for non-destructive analysis of near surface residual stress gradients for problematic material states will be developed. As model material the case hardening steel 20MnCr5 will be used. Two different carburization processes will be carried out to maximum carbon contents of 0.7% and 0.9%, respectively. CHD will be around 1 mm. Through surface strain scanning will be carried out at the SALSA instrument for all three principal directions.
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GIBMEIER Jens; CABEZA Sandra; HOFMANN Michael; PIRLING Thilo; PULVERMACHER Samuel; REBELO KORNMEIER Joana and SAROUN Jan. (2019). Residual stress analysis for materials with depth gradients of the strain free / independent lattice parameter d0. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-02-277
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