A 25 mm diameter steel bar is cold extruded first to 22 mm, then from 22 mm to a final diameter of 17 mm.
a. Determine the true strain for each of the extrusion steps.
Round your answers to three significant figures.
$\epsilon_1$ =
$\epsilon_2$ =
b. Compare the sum of the true strain for each extrusion to the true strain from 25 mm to 17 mm.
Determine the amount of true strain from the single step process.
Round your answer to three significant figures.
$\epsilon$ =