A flat
75-mm diameter aluminium plunger (SMS P/75) was used in TPA,
and the following process parameters were applied: pre-test speed
e 0.33 mm/s, test speed e 0.33 mm/s, post-test speed e 0.33 mm/s,
time lag between two compressions e 1 s, strain e 40% of sample
height. Preliminary compression tests were conducted to assess the
value of deformation at rupture point, measured as the percentage
of original sample heigh