In-situ determination of grain-orientation-dependent intergranular strain during defined uniaxial loading of duplex stainless steel
For materials states exhibiting a strong texture the texture must be considered during data evaluation of diffraction residual stress (RS) analysis not least since often a large discrepancy between the measured and calculated strains can be observed in materials where the grain-orientation dependent RS is significant. These intergranular stresses (type II stresses) are caused by stress/strain incompatibility between grains having different orientations during mechanical deformation. Study of the grain orientation dependence of the RS not only enables an unmistakable assessment of the macro RS but also helps to answer fundamental questions such as how the grain-to-grain interactions during and after deformation proceeds. The grain orientation dependent strain or stress can excellently be monitored by determining strain pole figures. For a holistic assessment of the grain orientation dependent intergranular strain for duplex steel phase-specific lattice strain pole figures will be determined in-situ during mechanical loading. By this means we aim at developing a basic understanding of the micro-mechanical behavior, of the load partitioning behaviour and of the formation of micro RS.
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GIBMEIER Jens; CABEZA Sandra; HOFMANN Michael; PIRLING Thilo; PULVERMACHER Samuel and REBELO KORNMEIER Joana. (2021). In-situ determination of grain-orientation-dependent intergranular strain during defined uniaxial loading of duplex stainless steel. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-02-289
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