FIGURE 6.3: Phase diagram for the tin-lead alloy system. Temperature C 300 a+L 200- 183C 100 0 Liquid 600 500 B B+L 400 61.9% Sn (362F) (eutectic composition) a+B 0 20 40 60 80 Pb Sn % Tin (Sn) 300 200 100 Temperature F a) Label the liquidus and solidus lines (2 pt) b) define all the pure phases, terminal phases, and intermedidate phases in the system (2 pt) c) For a 40% -Sn alloy at 145 C find the phases present (2 pt) d) For a 40% -Sn alloy at 145 C find the phase fraction of alpha and beta phases (weight percent) (4 pts) e) For this same composition, what would be the mass fraction of primary alpha and eutectic microconstitutents. (2 pt) f) Determine the mass fraction of eutectic alpha(2 pt) g) for part d, convert the mass fraction to volume fraction (look up density) (4 points) h) for this same composition draw the phases present at 375, 225, 180, 100 C (2 pt)