Monotonic and cyclic fracture studies on bi-metallic pipe weld joints
Fracture studies were carried out on bi-metallic pipe (made of SA 508 Gr.3 Cl-1 carbon steel and SA312 Type 304LN stainless steel) weld joints of 324 mm nominal outer diameter having circumferential notch. The initial notch was located in the different regions of the weld joints such as weld centre, buttering, heat affected zone, and base metals (carbon steel and stainless steel). During the fracture (monotonic/cyclic) tests, load, load-line displacement (LLD), crack mouth opening displacement (CMOD), deflection of the pipes (at five locations) and the surface crack growth were continuously monitored
