| Abstract Scope |
This study looks at how precipitates affect hot-rolled X-65 Line pipe steel's in-plane tensile behavior, including strain hardening. On the RD-TD plane, tensile samples were made in four different orientations: 0°, 30°, 60°, and 90° to the RD. Superior mechanical characteristics, including improved yield continuity and an ideal strength-ductility balance, were demonstrated by the 90° sample. Grain boundary properties, dislocation-precipitation interactions, and elastic-plastic incompatibility at grain boundaries all contribute to the yielding behavior and tensile response. The improved characteristics of the 90° sample are mostly due to the interaction of dislocations with tiny precipitates as well as variations in Elastic Modulus (EM) and Schmid Factor (SF) across high-angle grain boundaries (HAGBs). |