Tensile residual stress fields produced in austenitic alloy weldments

Book · Tue Jul 01 04:00:00 EDT 1997

OSTI ID:485103

Hornbach, D J; Prevey, P S ^[1]

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1. Lambda Research, Cincinnati, OH (United States)

Residual stresses developed by prior machining and welding may either accelerate or retard stress corrosion cracking (SCC), austenitic alloys, depending upon their magnitude and sign. A combined x-ray diffraction (XRD) and mechanical technique was used to determine the axial and hoop residual stress and yield strength distributions into the inside diameter surface of a simulated Alloy 600 penetration J-welded into a reactor pressure vessel. The degree of cold working and the resulting yield strength increase caused by prior machining and weld shrinkage was calculated from the line broadening distributions. Tension as high as +700 MPa was observed in both the axial and hoop directions at the inside diameter adjacent to the weld heat affected zone (HAZ). Stresses exceeding the bulk yield strength develop due to the combined effects of cold working of the surface layers during initial machining, and subsequent weld shrinkage. Cold working produced by prior machining was found to influence the final residual stress state developed by welding.

• OSTI ID: 485103
• Report Number(s): CONF-970146--; ISBN 1-890277-03-7
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
BWR TYPE REACTORS
COLD WORKING
EXPERIMENTAL DATA
INCONEL 600
PRESSURE VESSELS
PWR TYPE REACTORS
REACTOR VESSELS
RESIDUAL STRESSES
WELDED JOINTS
YIELD STRENGTH