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6. The copper-silver phase diagram is sho wn below. Consider a 40 wt% Ag alloy. 1084,5 1000 961,93°С 900 (Cu) 800 780 91 ,0 71,9 700 600 500 400 Cu 10 20 30 45060 70 8090 Ag Silver, wt% (a) What is the temperature at which the alloy fully melts? (b) Just above 780 °C: (i) (ii) Which phases are present? As you cool the molten material and precipitates start form, does the concentration of copper in the solution increase or decrease? Explain the physical origin of this change. (iii) Sketch the microstructure and label the components of the material. If primary and secondary phases are present, label each separately. (iv) What is the constitution of the different phases present (in wt %)? If primary and secondary phases are present, list the wt % of each separately. (c) Just below 780 °C (i) (ii) Which phases are present? Sketch the microstructure and label the components of the material. If primary and secondary phases are present, label each separately. (iii) What is the constitution of the different phases present (in wt %)? If primary and secondary phases are present, list the wt % of each separately.

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6. The copper-silver phase diagram is sho wn below. Consider a 40 wt% Ag alloy. 1084,5...
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