For the Charpy impact strength rectangular, unnoticed
specimens of 80 9 10 9 2 mm were manufactured and
tested according to DIN EN ISO 179. Impact strength was
measured on a Thwing-Albert Frank (Uffenheim, Germany)
testing machine type 53302 operating with a pendulum
length of 225 mm and a pendulum size of 1 J. For each
testing procedure, at least five specimens at 0 machine
direction were tested. All results were taken as the average
reading of the measured samples