The oil and gas production has grown steadily, the care with its transportation grid needs to be maintained expanded. pipeline used in transport of by-product requires materials high mechanical strength, toughness, fatigue resistance. chemical composition distribution, amount, morphology final microconstituents steel are paramount importance once it will directly influence properties. fracture ...

Abstract For structural assessment and optimal design of thick-section high-strength steels in applications under harsh service conditions, it is essential to understand the cleavage fracture micromechanisms. In this study, we assess effects through-thickness microstructure an 80-mm-thick quenched tempered S690 steel, notch orientation, crack tip constraint nucleation propagation via sub-sized ...

The present study investigates the fracture toughness of FSW X80 HSLA steel welds. Weld cooling rate and peak temperature were varied among welds; indirectly manipulated through travel speed, rpm, weld preheat. Fracture was tested according to ASTM 1820 standard along centerline using surface-notched SEB specimen cooled −40 °C. Results demonstrate that CTOD has a strong inverse linear correlati...