18th Intl. Symp. on Multiscale & Multiphysics Modelling of 'Complex' Material

Nuclear materials such as duplex structural stainless steels (DP) are highly corrosion-resistant and are being used in chemical, petrochemical, marine, power generation, and nuclear industries due to their unique properties. These materials microstructures involve austenite (γ)-ferrite (δ) compositions and processing routes and lead to variety of mechanical and fracture properties. To better understand the mechanical behavior of these materials, we developed a dual phase material model from the binary image source data and conducted multiscale analysis.  In the first level, the material properties of phases were homogenized using law mixture and elastic stress and strain field’s contour plots were examined. Further, analysis with 3D model constructed from selected sections was also completed and the results were compared. The results obtained from 3D model showed marginal change while compared with 2D FEA results. It was also observed from the results that the elastic stress and strain fields were influenced by the different phases. Hence, this micro/macro mechanics analysis of nuclear material from the image data could be of the fast and reliable methodology to investigate the performance of material considering their microstructure. The results obtained from this multiscale analysis will be presented at the conference.