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à books.. mater als >< \D chapter 2, sector G. What is the comp ×) GThefigure below. × OBng x: loads/HWA-No5.pdf Problem 1(10 points) The figure below shows the phase diagram between silver (Ag) and mercury (Hg). A homogeneous mixture of these elements, with composition 60 wt% Ag-40 wt% Hg, is slowly cooled from 9000, down to room temperature. At what temperature do the first crystals form? 1. What is the composition of the solid that crystallizes then? 2, Describe the nature of the α phase labeled in the diagram. 3. At what temperature does the last drop of liquid freeze? 4. What is the composition of the last bit of liquid prior to complete solidification? 5. Draw a sketch of the microstructures obtained along that slow cooling path. 6, According to the phase diagram, what happens to the β phase (40 wt% Ag-60 wt% Hg) when heated from room temperature up to 280°C? Explain and give the composition and fraction of phases present at that temperature. Atom% Hg 10 30 50 70 90 1000 r Temp TeC Liquid 800 600 400 Liquid 200 걘+L 0 89* O 20 40 60 80100 Mass% Hg
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