Fatigue & Fracture of Engineering Materials & Structures · 2008 · 76 citations · 13 references
Natural SciencesMaterials ScienceMechanical EngineeringMaterials CharacterizationMechanical Behavior Of MaterialsStructural MaterialsDuctilityFracture MechanicsMechanical CharacterizationMechanical TestingSteel MaterialsStrength Of MaterialsDuctile-brittle TransitionDuctile-to-brittle Transition TemperatureDuctility AssessmentFracture Toughness MeasurementFracture Toughness TestingSteel DuctilitySteelsStructural Steel
ABSTRACT The small punch test (SPT) consists in punching very small square specimens, measuring 10 × 10 mm 2 and 0.5‐mm thickness, until fracture using a 2.5‐mm‐diameter hemispherical punch. Different specimens of a structural steel were tested from room temperature to cryogenic temperatures in order to determine its ductile‐to‐brittle transition temperature (DBTT). The DBTT obtained in SPT (DBTT STP ) is much lower than the DBTT obtained by means of Charpy specimens (DBTT CVN ). The variation of the mechanical parameters calculated from the SPTs with temperature was also calculated and the operative fracture micromechanisms defined using a scanning electron microscope.
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