Weld residual-stress redistribution near growing cracks. Final report. [BWR]
A numerical analysis representing Intergranular Stress Corrosion Cracking (IGSCC) in a residual-stress field of the heat-affected zone (HAZ) of a girth-butt weld is presented. A complete, preexisting circumferential crack, growing radially outward in a 10-cm (4-in.) schedule 80 recirculation line, is modeled using the elastic properties of boiling water reactor (BWR) Type 304 stainless steel. An equilibrium solution for an uncracked pipe's residual stress field is applied as an initial condition; subsequent stresses are calculated incrementally, as the crack slowly propagates through the isothermal pipe wall. Results from these elastic calculations show that the axial extent of the initial residual stress field has little influence on the stress intensification and crack arrest for extents greater than three pipe wall thicknesses. Consequently, the current linear elastic fracture mechanics (LEFM) methods with residual stresses produce accurate stress intensity factors for the boundary conditions studied here.
- Research Organization:
- Science Applications, Inc., San Leandro, CA (USA); Science Applications, Inc., Albuquerque, NM (USA)
- OSTI ID:
- 6461639
- Report Number(s):
- EPRI-NP-2964; ON: DE83901986
- Country of Publication:
- United States
- Language:
- English
Similar Records
Evaluation of stress corrosion crack growth in BWR piping systems
Analysis of residual stresses in girth welded type 304 stainless steel pipes. [BWR type reactors]
Related Subjects
210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BWR TYPE REACTORS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COOLING SYSTEMS
CORROSION
CORROSION RESISTANT ALLOYS
CRACKS
ENERGY SYSTEMS
FRACTURE MECHANICS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MATERIALS
MECHANICS
NICKEL ALLOYS
PIPES
PRIMARY COOLANT CIRCUITS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTOR MATERIALS
REACTORS
RESIDUAL STRESSES
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
STRESS CORROSION
STRESS INTENSITY FACTORS
STRESSES
WATER COOLED REACTORS
WATER MODERATED REACTORS
WELDED JOINTS