TY - JOUR
T1 - Fracture-toughness evaluation in submerged arc-welding seam welds in nonstandard curved SE(B) specimens in the short radial direction of API 5L steel pipe
AU - Angeles-Herrera, D.
AU - González-Velázquez, J.
AU - De Morales-Ramirez, A. J.
PY - 2012/11
Y1 - 2012/11
N2 - Plane-strain fracture toughness of submerged arc-welding seams of an API 5L steel pipe in the short radial direction was evaluated using nonstandard curved SE(B) test specimens. These specimens are directly cut from the pipe and require no machining other than the crack starter notch. The stress intensity factor function for the nonstandard curved SE(B) specimen was calibrated for three-point bending loading. The initiating notch was aligned to make the crack propagate through the weld-deposited metal zone. The measured fracture-toughness value was 56.362.9 MPapffimffiffiffi. A fractographic study of the tested specimens showed that the deposited metal fracture consists of a mixture of ductile tearing and cleavage that corresponds to the ferrite and the dendritic grains, respectively. The dendritic grains behave in a brittle way, thus being the main contributions to the relatively low fracture-toughness values obtained from the tests.
AB - Plane-strain fracture toughness of submerged arc-welding seams of an API 5L steel pipe in the short radial direction was evaluated using nonstandard curved SE(B) test specimens. These specimens are directly cut from the pipe and require no machining other than the crack starter notch. The stress intensity factor function for the nonstandard curved SE(B) specimen was calibrated for three-point bending loading. The initiating notch was aligned to make the crack propagate through the weld-deposited metal zone. The measured fracture-toughness value was 56.362.9 MPapffimffiffiffi. A fractographic study of the tested specimens showed that the deposited metal fracture consists of a mixture of ductile tearing and cleavage that corresponds to the ferrite and the dendritic grains, respectively. The dendritic grains behave in a brittle way, thus being the main contributions to the relatively low fracture-toughness values obtained from the tests.
KW - API 5L steel pipe
KW - Fracture toughness (KIC)
KW - Metal deposited (MD)
KW - Short radial direction (SR)
KW - Submerged arc welding (SAW)
UR - http://www.scopus.com/inward/record.url?scp=84873393326&partnerID=8YFLogxK
U2 - 10.1520/JTE103903
DO - 10.1520/JTE103903
M3 - Artículo
SN - 0090-3973
VL - 40
JO - Journal of Testing and Evaluation
JF - Journal of Testing and Evaluation
IS - 6
ER -