Compute for the relative amount of each phase present in term of mass fraction for a 80% Cu - 20% Ag alloy at 1600F. Composition as 40 1200 60 18 100 2200 2000 -Liquidus 1000 Liquid 1800 Solidus 1600 O. 200 779C (T R 80 719 91.2 1400 Somente 1200 600 Solvus 1000 BOO 400 GOO 2006 20 40 60 400 100 (Cu) Composition wt Ag) Figure 9.7 The copper-silver phase diagram. (Adapted from Binary Alloy Phase Diagrams, 2nd edition, Vol. 1. 1. B. Massalski (Editor-in-Chief), 1990. Reprinted by permission of ASM International, Materials Park, OH.)