Composition (at% Ag) 40 20 60 80 100 2200 1200 2000 -Liquidus 1000 Liquid 1800 F -Solidus +L 1600 800 779c (Tg BEL G B 8.0 (C) 1400 Temperature (C) 71.9 (C) - 91.2 (C) Temperature (F) 1200 600 1000 Solus H ! 800 400 600 2009 400 100 20 40 60 80 (Cu) Composition (wt% Ag) 1. Explain the sequence of events in terms of microstructure development for a 40 wt% silver alloy cooling from 1200C to 200C 2. At an overall composition of 20 wt% Ag at 900C, use the lever rule to calculate the relative weight fractions of liquid and solid in the 2-phase mixture