Research on 3D reconstruction technology of microscopic pore defects in cast steel

Abstract

Abstract Affected by the production process, microscopic pore defects are inevitably distributed in steel castings. The existence of microscopic defects affects the macroscopic mechanical properties of steel castings. The numerical analysis of finite element model with microscopic pore defects is one of the effective ways to reveal the influence of microscopic defects on failure and fracture of steel castings. However, the spatial morphology of microscopic pore defects in cast steel is extremely complex, so the traditional CAE modeling method cannot meet the accuracy requirements. This article was inspired by the idea of reverse modeling in the medical field. Based on the 3D X-ray tomography data of G20Mn5N cast steel specimens, 3D models of microscopic pore defects with complex spatial morphology were reconstructed. Finite element analysis was performed in representative volume elements (RVE) model to study the effect of microscopic pore defects characteristics on the mechanical properties of cast steel.