Residual stresses due to weld repairs, cladding and electron beam welds and effect of residual stresses on fracture behavior. Annual report, September 1, 1977--November 30, 1978

Technical Report · Wed Nov 01 04:00:00 EST 1978

OSTI ID:6471932

Rybicki, E F

The study is divided into three tasks. Task I is concerned with predicting and understanding the effects of residual stresses due to weld repairs of pressure vessels. Task II examines 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 objective of Task I is to develop a computational model for predicting residual stress states due to a weld repair of pressure vessel and thereby gain an understanding of the mechanisms involved in the creation of the residual stresses. Experimental data from the Heavy Section Steel Technology (HSST) program at Oak Ridge National Laboratories (ORNL) is used to validate the computational model. In Task II, the residual stress model is applied to the case of an electron beam weld of a compact tension freacture specimen. The results in the form of residual stresses near the weld are then used to explain unexpected fracture behavior which is observed in the testing of the specimen. For Task III, the residual stress model is applied to the cladding process used in nozzle regions of nuclear pressure vessels. The residual stresses obtained from this analysis are evaluated to determine their effect on the phenomena of under-clad cracking.

• Research Organization: Battelle Columbus Labs., OH (USA)
• OSTI ID: 6471932
• Report Number(s): NUREG/CR-0559; BMI-2012
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
CONTAINERS
FRACTURE PROPERTIES
JOINTS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
POWER REACTORS
PRESSURE VESSELS
REACTORS
REPAIR
RESEARCH PROGRAMS
RESIDUAL STRESSES
STRESS ANALYSIS
STRESSES
WELDED JOINTS