Residual stresses at weld repairs in pressure vessels. Second quarterly progress report
Technical Report
·
OSTI ID:6763498
The study is divided into three tasks. Task 1 is concerned with the residual stress distributions due to a weld repair of a pressure vessel. Task II examines the residual stresses due to an electron beam weld. Task III addresses the problem of residual stresses produced by weld cladding at a nozzle/vessel intersection. The progress reported here is concerned with Task I; residual stresses due to a weld repair of a pressure vessel and Task II; the electron beam welded compact tension specimen. The objective of Task I is to develop a computational model for predicting residual stress states due to a weld repair of a pressure vessel. The model is being developed through modifications of an existing residual stress analysis capability developed for girth-butt welds of pipes and pressure vessels. Residual stress results obtained with this model have shown good correlation with data for girth-butt welds. Thus, the approach, based on the computational model for girth-butt welds, appears to provide a reasonable starting point for developing a model to represent the weld repair problem. In fact, residual stress from a preliminary application of this model to the weld repair of the Heavy Section Steel Technology Intermediate Test Vessel Number 8 (HSST ITV-8) have shown qualitative agreement with the residual stress data.
- Research Organization:
- Battelle Columbus Labs., Ohio (USA)
- OSTI ID:
- 6763498
- Report Number(s):
- NUREG/CR-0078
- Country of Publication:
- United States
- Language:
- English
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