Introduction of a new notched specimen geometry to determine fracture properties by small punch testing

Mechanical characterisation of a P91 weldment by means of small punch fracture testing

“…The origin of this shift has been widely discussed in previous studies and can be attributed to the main differences between the two techniques: size and strain rate effects [10,26,27]. The presence of a notch (stress triaxiality) in Charpy specimens has also been suggested as a possible cause of the shift but the influence of a circular notch in SP discs has been shown not to have an effect on moving the SP transition temperature closer to the Charpy transition temperature [27]. Further investigations on this topic may need to focus on different notch configurations.…”

Coupled porous plasticity – Continuum damage mechanics approaches for modelling temperature driven ductile-to-brittle transition fracture in ferritic steels

“…Finally, axisymmetric simulation of small punch fracture testing has been performed considering 22 • C,−196 • C and −158 • C, which belong to ductile, brittle and transition fracture ranges of P91 steel. Validation of small punch simulations have been performed with comparison to recent work by Turba et.al, [5].…”

“…Unlike commonly used cleavage models such as Ritchie-Knott-Rice [3] and Beremin [4], both of the proposed models have been aimed to take into account blended effects of micro-voids and micro-cracks in order to capture energy dissipation and softening accompanying and prior to brittle fracture. Numerical implementation has been done for ABAQUS/Explicit and uses staggered solution based on plastic flow-damage correction structure, while its validation has been performed modeling Small Punch Fracture Experiments for P91 ferritic steel, published by Turba et.al [5]. …”

Development of a new methodology for estimating the CTOD of structural steels using the small punch test

“…In recent years, several researchers have tended to use notched small punch specimens [5,[18][19][20][21][22][23]. This type of specimen seems to be more suitable due to having an initial defect which acts as a stress concentrator.…”