Residual stresses at pinch welds in small stainless steel tubes

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6490527

Mosley, W C

Stress corrosion cracking of pinch-welded Type 304L stainless steel tubes has been used to determine the locations and magnitudes of tensile residual stresses. Cracking severity, a measure of the extent of tensile stresses above a threshold level, has been correlated with welding parameters and annealing to define conditions that minimize the possibility of environment-assisted slow crack growth on the tube interior. Welding with low current, low electrode force and no restraint, and laser annealing after welding were found to minimize interior stress corrosion cracking at welds in cold drawn tubes. Preliminary work with annealed tubes indicates that pinch welding parameters influence tensile stresses differently.

• Research Organization: Savannah River Lab., Aiken, SC (USA)
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6490527
• Report Number(s): DP-MS-86-166; CONF-8704128-1; ON: DE87010186
• Resource Relation: Conference: Conference on residual stress in design, process, and materials, Cincinnati, OH, USA, 27 Apr 1987; Other Information: Paper copy only, copy does not permit microfiche production
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
STAINLESS STEEL-304L
STRESS CORROSION
WELDED JOINTS
CRACK PROPAGATION
CRACKS
RESIDUAL STRESSES
TUBES
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION
CORROSION RESISTANT ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MATERIALS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
STRESSES
360105* - Metals & Alloys- Corrosion & Erosion