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Effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 STEEL
Author(s) -
BeltranZuñiga M.A.,
GonzálezVelázquez J.L.,
RivasLópez D.I.,
DorantesRosales H.J.,
HernándezSantiago F.
Publication year - 2018
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12782
Subject(s) - microstructure , anisotropy , materials science , toughness , texture (cosmology) , ultimate tensile strength , composite material , fracture toughness , optics , physics , image (mathematics) , artificial intelligence , computer science
The combined effect of microstructure and crystallographic texture on the toughness anisotropy of API 5L X46 steel was studied. The steel exhibited microstructural banding along the 0° direction and near random texture in the material. The mechanical properties were characterized by the use of tensile and impact toughness samples oriented along the rolling direction (0°, 45°, and 90°). For impact toughness, anisotropic behavior was observed, where the 0° oriented samples showed lower impact toughness than the 90° and 45° directions, with differences of 25% and 31%, respectively, while the yield strength (YS) showed the lowest values in the 0° oriented samples. The relative variation coefficient (r rv ) indicates significant correlation between microstructure, texture, and toughness anisotropy. It was observed that the banding degree and the amount of {110} and {111} oriented grains are directly related to the degree of anisotropy, which high values are the cause of lower mechanical properties.