TY - JOUR
T1 - Determination of fracture toughness in the short transverse direction of low carbon steel pipes by compact-tension specimens completed by welded attachments
AU - Beltrán-Zúñiga, M. A.
AU - González-Velázquez, J. L.
AU - Rivas-López, D. I.
AU - Hernández-Santiago, F.
AU - Dorantes-Rosales, H. J.
AU - López-Hirata, V. M.
N1 - Publisher Copyright:
© 2019
PY - 2019/12
Y1 - 2019/12
N2 - An experimental procedure for direct measurement of the fracture toughness values (KIC) in the short transverse directions, of low carbon steel pipes, is proposed. The method consists of enlarging the material strip to be tested, by welding extensions so as to complete the dimensions of a valid compact tension specimen. Validation of the KIC results was done by the comparison between the values obtained from one-piece compact tension specimens and welded-completed specimens, both in the longitudinal direction (CL). Additionally, the effect of the steel microstructure orientation on the KIC in the short transversal direction was studied. The results show that the KIC values in the short transversal direction of low carbon steel pipes is as much as 20% lower than the CL direction. This is directly related to the relative orientation parameter (Ω12) and the banding degree (Ai) of the pearlite bands in the microstructure, and the location of the crack plane with respect to the pearlite banding plane.
AB - An experimental procedure for direct measurement of the fracture toughness values (KIC) in the short transverse directions, of low carbon steel pipes, is proposed. The method consists of enlarging the material strip to be tested, by welding extensions so as to complete the dimensions of a valid compact tension specimen. Validation of the KIC results was done by the comparison between the values obtained from one-piece compact tension specimens and welded-completed specimens, both in the longitudinal direction (CL). Additionally, the effect of the steel microstructure orientation on the KIC in the short transversal direction was studied. The results show that the KIC values in the short transversal direction of low carbon steel pipes is as much as 20% lower than the CL direction. This is directly related to the relative orientation parameter (Ω12) and the banding degree (Ai) of the pearlite bands in the microstructure, and the location of the crack plane with respect to the pearlite banding plane.
KW - Fracture toughness
KW - Microstructure orientation
KW - Pipeline steel
KW - Short transverse direction
KW - Welded specimens
UR - http://www.scopus.com/inward/record.url?scp=85073232978&partnerID=8YFLogxK
U2 - 10.1016/j.engfracmech.2019.106711
DO - 10.1016/j.engfracmech.2019.106711
M3 - Artículo
SN - 0013-7944
VL - 222
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
M1 - 106711
ER -