Experimental determination of the effect of last pass heat sink welding on residual stress in a large stainless steel pipe. Final report
The residual stresses in stainless steel pipe that result from welding may contribute to stress corrosion cracking under certain conditions of tensile stress and environment. Last pass heat sink welding (LPHSW) was developed to create compressive residual stresses on the inside surface of pipe where these conditions are most likely to occur. The objective of this program was to determine experimentally the through-wall residual stress distribution at welds in a 24-inch-diameter heavy wall pipe. The pipe contained a conventional butt weld and a butt weld made using the LPHSW method. The residual stresses in these two welds were compared to determine the effectiveness of the LPHSW technique. A critique was made of the strength of materials equations used to calculate subsurface stresses from strain measurements at the pipe surfaces during the destructive parting out and layer removal method used in the experiment.
- Research Organization:
- Southwest Research Inst., San Antonio, TX (USA)
- OSTI ID:
- 5350401
- Report Number(s):
- EPRI-NP-3361; ON: DE84920115
- Country of Publication:
- United States
- Language:
- English
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210100* -- Power Reactors
Nonbreeding
Light-Water Moderated
Boiling Water Cooled
ALLOYS
BWR TYPE REACTORS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COOLING SYSTEMS
CORROSION
CORROSION RESISTANT ALLOYS
ENERGY SYSTEMS
FABRICATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
MATERIALS
NICKEL ALLOYS
PIPES
PRIMARY COOLANT CIRCUITS
REACTOR COMPONENTS
REACTOR COOLING SYSTEMS
REACTORS
RESIDUAL STRESSES
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
STRESS CORROSION
STRESSES
TEST FACILITIES
WATER COOLED REACTORS
WATER MODERATED REACTORS
WELDED JOINTS
WELDING