Session: CS-19-03 European Project FRACTESUS for mini-CT Master Curve - 1

Paper Number: 105437

105437 - Fracture Characterization of Structural Steel S275jr by Using Conventional Ct Specimens, Mini-Ct Specimens and Small Punch Specimens: A Comparison 

Miniaturized specimens, such as mini-CT specimens and Small Punch (SP) specimens, are a solid alternative when characterizing the fracture behavior of structural materials and there are restrictions related to the amount of material being available, irradiation issues or material inhomogeneities, among other possible concerns. Moreover, in ferritic-pearlitic steels, fracture characterization is of particular interest within the ductile-to-brittle transition zone (DBTZ), and it is often performed through the definition of the Reference Temperature (T₀) and the Master Curve (MC) methodology. The use of mini-CT specimens has been validated in a number of steels used in the nuclear industry, but its application in other types of ferritic-pearlitic steels is very limited. In this regard, this work provides an overview of the fracture characterization results (T₀) in structural steel S275JR, which have been obtained by using conventional standardized Compact-Tension (CT) specimens, mini-CT specimens and SP specimens. This steel is a low carbon non-alloyed steel that is widely used in civil engineering structures. Here, it is shown how, for this particular structural steel, the use of miniaturized specimens provides T₀ estimations that are comparable to those values obtained from conventional larger specimens, and also that the MC approach accurately reflects the fracture behavior along the DBTZ.

Presenting Author: Marcos Sánchez Universidad de Cantabria

Presenting Author Biography: Marcos Sánchez is a second year PhD student at the University of Cantabria after completed his Master`s Degree in Structural Integrity at University of Cantabria (2020). He is currently a researcher at Laboratory of the Materials Science and Engineering Division (LADICIM) of the University of Cantabria. He is focusing mainly on polymer and metallic materials characterization of tensile and fracture properties, and lately in Mini-CT fracture testing of RPV and structural steels, collaborating in the european FRACTESUS project, which is also his focal point in his PhD.

Authors:

Marcos Sánchez Universidad de Cantabria
Sergio Cicero Universidad de Cantabria
Borja Arroyo Universidad de Cantabria