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Assignment 61- Below are given the solidus and liquidus temperatures for the germanium – silicon system. Construct the phase diagram for that system and label each region.2- A 50 wt% Ni–50 wt% Cu alloy is slowly cooled from 1400◦ C to 1200◦ C.(a) At what temperature does the first solid phase form?(b) What is the composition of this solid phase?© What are phases and weight percentage of each phase at 1200 and 1300(d) Draw cooling curves for pure Ni, pure Cu and 50% Cu.3- For AL-SI phase diagram, finda) Eutectic point phases present and their amount.b) It is required to prepare 10 kg of the hypo eutectic alloy containing 20% eutectic, calculate the weight of AL and Si needed.4- For a 40 wt% Sn–60 wt% Pb alloy at 150◦ C(a) What phase(s) is (are) present?(b) What is (are) the composition(s) of the phase(s)© Draw cooling curve for that alloy.5-A 40 wt% Pb–60 wt% Mg alloy is heated to a temperature within the liquid-phase region. If the mass fraction of each phase is 0.5, then estimate:(a) The temperature of the alloy.(b) The compositions of the two phases.6-A magnesium–lead alloy of mass 7.5 kg consists of a solid α phase that has a composition just slightly below the solubility limit at 300◦ C(a) What mass of lead is in the alloy?(b) If the alloy is heated to 400◦ C, how much more lead may be dissolved in the phase without exceeding the solubility limit of this phase?7-Cite the phases that are present and the phase compositions for the following alloys:(a) 25 wt% Pb–75 wt% Mg at 425◦ C(d) 50% Ni and 50 Cu at 1200 C8-For 5.7 kg of a magnesium–lead alloy of com- position 50 wt% Pb–50 wt% Mg, is it possible, at equilibrium, to have α and Mg2 Pb phases with respective masses of 5.13 and 0.57 kg? If so, what will be the approximate temperature of the alloy? If such an alloy is not possible, then explain why.9- For the Pb- Sn phase diagram,1) Draw the cooling curves for 10 wt% Sn , 61.9 wt% Sn and 80% wt% Sn.2) What will be the first solidified phase in each ally?
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