(25 pts) Assume that a powder mix has the values of k= 0.5 and u =...

 

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(25 pts) Assume that a powder mix has the values of k= 0.5 and u = 0.3. It is to be compacted by a ram as illustrated below. The diameter of the compact will be 50 mm. The ram will be actuated until it applies a force of 2 MN (2 10^6 N). Coarse iron powder will be used, which is known to follow the density vs. compacting pressure given below. MPа 200 400 600 800 1000 1200 9. 0.3 8. 7 Density of iron 0.2 Density of copper Apparent Density 3.49 g/cm 1.44 0.1 Copper powder, coarse O Copper powder, fine Iron powder, coarse 2.75 1 O Iron powder, fine 1.40 20 40 60 80 100 Compacting pressure (tons/in?) a) If the density after compaction must be at least 7.5 g/cm^3, what should be the compacting pressure? (10.0 pts) b) What is the pressure right under the ram? (5.0 pts) c) If the compacting pressure should be at least 750 MPa, what is the maximum compact height? (5.0 pts) d) How can you increase the compact height without dropping the pressure in the compact below 750 MPa? Explain. (5.0 pts) Density (g/cm) (25 pts) Assume that a powder mix has the values of k= 0.5 and u = 0.3. It is to be compacted by a ram as illustrated below. The diameter of the compact will be 50 mm. The ram will be actuated until it applies a force of 2 MN (2 10^6 N). Coarse iron powder will be used, which is known to follow the density vs. compacting pressure given below. MPа 200 400 600 800 1000 1200 9. 0.3 8. 7 Density of iron 0.2 Density of copper Apparent Density 3.49 g/cm 1.44 0.1 Copper powder, coarse O Copper powder, fine Iron powder, coarse 2.75 1 O Iron powder, fine 1.40 20 40 60 80 100 Compacting pressure (tons/in?) a) If the density after compaction must be at least 7.5 g/cm^3, what should be the compacting pressure? (10.0 pts) b) What is the pressure right under the ram? (5.0 pts) c) If the compacting pressure should be at least 750 MPa, what is the maximum compact height? (5.0 pts) d) How can you increase the compact height without dropping the pressure in the compact below 750 MPa? Explain. (5.0 pts) Density (g/cm)

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Pressure Vorichion within The Compact Can be fuund by Slob Aralysic 44Kx K 94 is afocto... View the full answer