A 50 wt% Ni–50 wt% Cu alloy is heated to a temperature within the a liquid-phase region. If the composition of the alpha phase is 58 wt% Ni, determine (b) the composition of the liquid phase in wt% Ni
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A 50 wt% Ni–50 wt% Cu alloy is heated to a temperature within the a liquid-phase region. If the composition of the alpha phase is 58 wt% Ni, determine (b) the composition of the liquid phase in wt% Ni
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- An alloy of 30 wt % Pb and 70 wt % Sn is slowly cooled from 250°C to 27°C: d) What is the amount and composition of each phase that is present at 183°C - ∆T ? e) What are the amounts of each phase present at room temperature? f) Draw the microstructure 183°C + ∆T and 183°C - ∆T in 2 cm diameter circle.A hypothetical A-B alloy of composition 54 wt% B-46 wt% A at some temperature is found to consist of mass fractions of 0.5 for both αand β phases. If the composition of the β phase is 89 wt% B-11 wt% A, what is the composition of the α phase? ________ wt% BIs it possible to have a copper–zinc alloy that, at equilibrium, consists of an phase of composition 75 wt% Zn– 25 wt% Cu, and also a liquid phase of composition 90 wt% Zn and 10 wt% Cu? If so, what will be the approximate temperature of the alloy? If this is not possible, explain why.
- Describe the phases present at the eutectic temperature when the overall composition is x(Cu)= 0.5For an Fe-0.35% C alloy, determine the composition and amount of each phase present at 726 ° C; and the composition and amount of each microconstituent present at 726 °C.A 80%Sn-20%Pb alloy is melted fully at 300°C and then slowly cooled down to 182°C. Sketch the microstructures at 300°C, 200°C, and 182°C, respectively. Label all phases and indicate their approximate compositions. Also, determine the follows for this alloy at 182°C. (1) The weight fractions of α and β phases.(2) The weight fractions of primary β and eutectic structure.(3) The weight fraction of eutectic β .
- Referring to Figure 1, answer the following: What are the liquidus and solidus temperatures for an 80%Pb20%Tl alloy? What is the composition of the solid solution phase for the aforementioned alloy once we hit the liquidus temperature upon cooling? For the same alloy above, use the inverse lever rule to calculate the %solid and %liquid at 325CCite the phases that are present and the phase compositions for the following alloys: 1.25 kg Sn and 14 kg Pb at 200°CFrom the phase diagram of the Fe-0.25wt%C alloy below, determine the phase fraction and elemental composition of the resulting phase immediately after solidification across the eutectoid line (725 C). a.alpha_eutectoid = 96.6 wt% and cementite = 29.85 wt% b.alpha_eutectoid = 96.6 wt% and cementite = 3.4 wt% c.alpha_eutectoid = 1.05 wt% and cementite = 29.85 wt% d.alpha_eutectoid = 29.85 wt% and cementite = 1.05 wt%
- find the relative amounts (in terms of mass fractions) of the phases for the following alloys and temperature: 90 wt% Zn-10 wt% Cu at 400°C.A lead-tin (Pb-Sn) alloy of composition 30 wt % Sn and 70 wt % Pb is slowly heated from a temperature of 140 OC. Refer to the phase diagram provided in Figure 1 and answer the following. (i) At what temperature does the first liquid phase form? (ii) What is the composition of this liquid phase? (iii) At what temperature does complete melting of the alloy occur? (iv) What is the composition of the last solid remaining prior to complete melting?A 50 wt% Pb–50 wt% Mg alloy is slowly cooled from 700°C to 400°C. (a) At what temperature does the first solid phase form? (b) What is the composition of this solid phase? (c) At what temperature does the liquid solidify? (d) What is the composition of this last remaining liquid phase?