About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Minerals, Metals and Materials 2026 - In-Situ Characterization Techniques
|
| Presentation Title |
Investigation of Fracture Toughness in Repair Welds of Process Piping Using Electron Backscatter Diffraction and Atomic-Scale Modelling |
| Author(s) |
Gil Mabini Agag, Persia Ada de Yro |
| On-Site Speaker (Planned) |
Persia Ada de Yro |
| Abstract Scope |
Weld repair is a concern in low-carbon steel piping because the equipment is crucial in the energy and chemical processing industries. The study evaluates and compares repair and original welds using actual welding experiments. Following welding, undertake destructive testing with microhardness, tensile, Charpy and crack tip opening displacement at 0 degree C, scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD), as well as atomic-scale simulations and modelling with analytical and numerical methods. The welding experiment comprises A106 grade B low-carbon steel piping with a diameter of 18 inches. SEM collects microstructure, while EBSD offers nanoscale data on the lattice parameters of α-Fe (ferrite) and Fe₃C (cementite) of repair and original welds. Analytical and numerical modelling determine the pressure-volume derivative (dP/dV) and energy-volume derivative (d²E/dE²) needed to compute bulk modulus and for fracture toughness. Welds surpass the requirement of ASME B31.3, boosting asset performance and extending equipment operational life. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Mechanical Properties, Modeling and Simulation |