About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Neutron Scattering for Engineering Materials
|
| Presentation Title |
Understanding and Controlling Residual Stress Evolution in Welded Large-Scale Stainless Steel Structures |
| Author(s) |
Zhenzhen Yu, Timothy Pickle, Chen Ni, Julian Osorio |
| On-Site Speaker (Planned) |
Zhenzhen Yu |
| Abstract Scope |
Weldability challenges in austenitic stainless steels frequently arise in the heat-affected zone and weld metal. These challenges are primarily attributed to a combination of three factors: the presence of internal inhomogeneous distribution of residual stresses, formation of susceptible microstructural features, and exposure to severe service environments. These factors collectively contribute to premature failures well in advance of the base metals. Among these factors, residual stress plays a critical role due to its significant influence on various cracking mechanisms and premature failures during service. Weld-induced residual stresses are governed by several parameters, including heat input, plate thickness, joint geometry, welding layout design, and constraint conditions. This study employs an approach combining neutron diffraction and finite element modeling to investigate the evolution of stress during welding, post weld heat treatment, service and repair processes in large-scale stainless steel tanks designed for thermal energy storage and to identify mitigation strategies for enhanced reliability. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Iron and Steel, Characterization |