This study investigates crack propagation in a pearlitic armor flexible riser subjected to CO2-rich
marine environments, employing Scanning Electron Microscopy (SEM), Electron Backscatter
Diffraction (EBSD), and Finite Element Modeling (FEM). A gradient in mechanical properties
across the material’s depth reveals a balance between surface strength and inner shear stress
resistance, transitioning from γ-fiber and (001) texture at the surface to {110〈uvw〉texture
deeper. Our study revealed that Mode I (KI) fracture predominantly influences the failure,
emphasizing the critical role of tensile stress in crack resistance. Analysis shows that crack growth
is most susceptible at the midsection pit (z/a = 0), with pit size significantly affecting stress
intensity. The study highlights the importance of material processing and microstructural
orientation in determining mechanical properties, contributing to the development of robust
materials for challenging marine applications.