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

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

“…In literature, there are various presented experimental results on both small punch testing at room temperature and ductile to brittle transition of ferritic steels, see e.g, [51], [52], [53], [5]. Among those, the recent work of Turba et.at, [5] performed experiments for temperatures starting from 22 • C to −196 • C, also covering the ductile to transition range.…”

An Enhanced Method to Evaluate Tensile Yield Stress by Small Punch Tests Using Deflection Curves

“…Small Punch (SP) testing using disc-shaped specimens with a thickness of 0.25 or 0.5 mm and diameters of 3 or 8 mm, respectively, is an example of the latter approach. Due to the small size of the specimens, this technique enables extracting samples from local areas like a weld or even the heat-affected zone of a weldment [2][3][4], where the non-uniformity of the mechanical properties precludes usage of standard specimen sizes. SP testing has also proven important a technique for rapid prototyping and virtually non-destructive performance assessment of service-exposed materials.…”

Experimental and Computational Study of Ductile Fracture in Small Punch Tests

“…The test requires smaller specimen sizes as compared to standard mechanical tests. Hence, it allows investigations of regions with gradients properly, such as heat affected zones [ 1 , 2 ]. Due to its small size the test is almost non-destructive.…”

“…On the experimental side, SP tests are carried out using disks of P91 material which is a heat resistant steel widely used in power plants. Due to this reason it is frequently preferred as the test material in the SP method [ 1 , 2 , 5 , 6 ]. The SP disks are produced with varying thicknesses from 0.2 mm to 1 mm were tested up to complete fracture.…”