Question

a final height of 24.4 A 88.9 mm diameter by 133.35 mm height AZ31B billet is forged t mm at a constant strain rate of 0.01 s1 at temperatures between 250 °C - 400 °C The stress strain characteristics of AZ31 material at these different temperatures at the strain rate 0.01 s, are given in Figure below. a) Estimate the force required for forging at two temperatures 250 °C- 400 °C under conditions of: sliding fraction with μ-0.2 and sticking friction. - b) Plot on a graph showing a dependence of the Forging Force as a function of True Strain that AZ31B billet experiences during forging, under conditions of sliding fraction with μ 0.2 and sticking friction, for these two temperatures. Assume no work hardening. 200 180 160 140 73K 623K 673K 0 E 120 100 80 40 20 0 0.10.2 0.3 04 05 06 07 0.8 0.9 1 True strain Figure. Flow stress characteristics of AZ31B alloy at a constant strain rate of 0.01 s1 and temperatures between 523K- 673K.

Answer 1