(OSU) Stress Relief and Stress Relaxation Cracking in Creep Resistant Steel Welds for Petrochemical and Power Generation Application- Phase II
- Highly restrained thick wall low alloy steel welds are subjected to high stresses and temperatures in service.
- Post weld heat treatments (PWHT) are conducted to relieve residual stresses that form during welding.
- This makes these welds subject to the risk of Stress Relief Cracking (SRC) and Stress Relaxation Cracking (SRxC).
- A GleebleTM-based SRC test procedure has been developed at The Ohio State University.
- The motivation for this project is to further develop this testing procedure and fundamentally study the mechanism of stress relief cracking.
- Such testing procedure will be used to rank SRC susceptibility, identify safe PWHT conditions, and study the SRC mechanism.
- Currently, there is not a standardized SRC test that accurately reproduces thermomechanical phenomenon a weldment would experience during PWHT that would lead to SRC.
Industry Sponsor: Shell
Graduate Student: Conner Sarich
Industry Contact: Jorge Penso