3. What are the phases and wt% present at A (1100C, 60 wt% Ni), B (1250C, 50 wt% Ni), and C (1350C, 40 wt% Ni)? 3. For a 40 wt% Sn-60 wt% Pb alloy at 150C, determine: A) the 150 1400 phases present, B) the phase compositions, and C) the relative amount of each phase T(C) 300+ 200+ a 100+/ 0 L+a 18.3 20 L (liquid) 183 61.9 a + Z+B/B 97.8 L 60 80 C, wt% Sn T( C) 1600 100 1300 1200 1100 Pb-Sn system 1000 0 L (liquid) 20 I 40 +a liquidus solidus a (FCC solid solution) Cu-Ni phase diagram 1 I 60 80 100 wt% Ni