Residual-stress measurements on multi-pass weldments of stainless-steel piping

Journal Article · Sat Sep 01 04:00:00 EDT 1979 · Exp. Mech.; (United States)

DOI:https://doi.org/10.1007/BF02324152· OSTI ID:5670118

Ellingson, W A; Shack, W J

This paper presents measurements of the bulk residual stresses in 100-mm (4-in.) and 250-mm (10-in.) diam Schedule 80 piping weldments using strain-relief techniques. Both laboratory-welded specimens and field-welded specimens from reactors in service were studied. Axial bulk residual-stress distributions were obtained at 45-deg intervals around the circumference. At each azimuthal position, the residual stresses were measured at seven axial positions: on the weld center line and 13, 20 and 25 mm to either side of the weld center line, on both the inside and outside surface. The specimens were parted out using a wire-feed electric-discharge machine, and the resulting strain relief was measured with electrical-resistance strain gages (120-deg rosettes). The bulk residual stresses obtained on the inside surface of the 100-mm weldments exhibit an oscillatory distribution with peak values above 275 MPa (40 ksi) and stress gradients normal to the weld on the order of 35 MPa/mm (127 ksi/in.).

• Research Organization: Argonne National Lab., IL
• OSTI ID: 5670118
• Journal Information: Exp. Mech.; (United States), Journal Name: Exp. Mech.; (United States) Vol. 19:9; ISSN EXMCA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
EVALUATION
FABRICATION
IRON ALLOYS
IRON BASE ALLOYS
JOINING
JOINTS
PIPES
RESIDUAL STRESSES
STAINLESS STEELS
STEELS
STRESS CORROSION
STRESSES
WELDED JOINTS
WELDING