| Abstract Scope |
The study investigates the interplay between microstructural evolution and mechanical properties in interstitial-free (IF) steel through a series of interrupted uniaxial tensile tests. IF steel, known for its superior formability due to the presence of soft diffusional ferrite transformed from austenite. Tensile deformation was systematically interrupted at selected strain levels, allowing for comprehensive microstructural characterization at various stages of plastic deformation. Electron microscopy, including SEM and TEM, and electron backscatter diffraction (EBSD), was employed to analyze grain orientation, dislocation, and substructure evolution during deformation. The study closely examines how grain rotation contributes to the development of crystallographic texture and the subsequent effects on key mechanical properties such as yield strength, ductility, and fracture behavior. These findings advance the fundamental understanding of deformation mechanisms in IF steel, offering practical pathways to optimize processing routes and tailor properties for industrial use, while contributing to the development of next-generation high-formability steels. |