Abstract
The 347H stainless steel is a primary high-temperature material for many energy and power generation industries. Stress relief cracking (SRC) has been a particular concern in welding of this material. The residual stress induced by welding and its evolution during post-welding heat treatment (PWHT) and subsequent operating and service conditions is one of the primary factors contributing to SRC. The lifetime of welded structure components is also controlled by the precipitation kinetics that accompanies PWHT, stress relaxation process, and long-term aging and complex synergistic factors. Various theories have been proposed in the past to explain SRC. However, a widely accepted approach to predicting the entire damage evolution and the resulting performance reduction is still lacking. This study is to demonstrate a reliable solution for two critical issues that affect the predictions. First, the residual stress distribution obtained from both simulation and neutron diffraction is compared, which increases the accuracy of mechanical analysis simulation model and therefore builds a solid basis for the lifetime prediction model. Second, the generation, evolution, and annihilation of precipitates are monitored by the synchrotron diffraction experiment. Preliminary results demonstrate the critical importance of precipitation kinetics on the residual stress distribution/redistribution during heat treatments.
| Original language | English |
|---|---|
| Title of host publication | Operations, Applications, and Components; Seismic Engineering; ASME Nondestructive Evaluation, Diagnosis and Prognosis (NDPD) Division |
| Publisher | American Society of Mechanical Engineers (ASME) |
| ISBN (Electronic) | 9780791886199 |
| DOIs | |
| State | Published - 2022 |
| Event | ASME 2022 Pressure Vessels and Piping Conference, PVP 2022 - Las Vegas, United States Duration: Jul 17 2022 → Jul 22 2022 |
Publication series
| Name | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
|---|---|
| Volume | 5 |
| ISSN (Print) | 0277-027X |
Conference
| Conference | ASME 2022 Pressure Vessels and Piping Conference, PVP 2022 |
|---|---|
| Country/Territory | United States |
| City | Las Vegas |
| Period | 07/17/22 → 07/22/22 |
Funding
This work was supported by the Shell Projects and Technology team. Neutron diffraction work was carried out at the High Flux Isotope Reactor (HFIR), which is the U.S. Department of Energy (DOE) user facility at the Oak Ridge National Laboratory, sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences. The authors thank Dr. Andrey Yakovenko at APS for the technique support. This research also used resources of the Advanced Photon Source; a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science.