Consider the Al-Li phase diagram below and answer the following questions. 800 Temperature (°C) 700 L 600 4 20.4 2 α 500 β 9.9 400 -Y 300 200 100 0 ΑΙ 20 40 60 α (Li)- 80 Li Weight percent lithium 1) What is the melting point of pure Al? (2 pts) 2) What is the approximate maximum solubility of Li in Al (a phase)? At what temperature that occurs? (6 pts) 3) The phase constitution and their weight fraction at the points i) 10.0 wt.% Li and 200°C, ii) 30 wt.% Li and 600°C. (12 pts) 4) Name the types of reactions that occur at the two circles locations, write down the phases involved before and after the reaction, and their relative weight fractions (if more than one phases) before and after the reactions. (13 pts) 5) For the 5 wt.% Li alloy, initial fully liquid, write down at what temperature phase boundaries are crossed and the reaction that happens at the boundaries when it is gradually cooled down to room temperature. (9 pts) 6) Draw the microstructure of the 5 wt.% Li alloy after cooling to room temperature assuming an equilibrium transformation. Please mark the phase constitution of distinct domain in the drawing. (3 pts)

A NIO-20 mol % Mgo ceramic is allowed to solidify. (See the figure below.) Temperature (°C) 2800 2600 2400- 2200 2000 L (Ni, Mg)0 40 60 80 MgO Mole percent MgO NIO 20 (a) Determine the composition (in mol% MgO) of the first solid to form. 80 x (b) Determine the composition (in mol% MgO) of the last liquid to solidify under equilibrium conditions. 35 X%

Can you please solve this problem and show all of your work

How would I... Determine the composition of aluminum and silicon (%Al/%Si) to melt the Al-Si solution at the lowest possible temperature. Please explainyour results...TIA

For alloy of two hypothetical metals A and B, there exist an a, A-rich phase and a B, B-rich phase. For alloys of two different overall compositions at 25°C, the weight fractions of Wa and WB are listed in the table. Determine the solubility limits for both a and B phases at 25°C. Alloy Composition Wa WB 70wt% A-30wt% B 0.78 0.22 35wt% A-65wt% B 0.36 0.64

Using the following table, draw a melting point diagram and estimate the eutectic temperature and composition: Percent composition Melting point range (°C) 100% A 125-126 75% A-25% B 115-120 65% A- 35% B 128-131 50% A- 50% B 135-140 100% B 151-152 Can you suggest what additional points you need to give a more accurate measure of the eutectic point?

Consider 1 kg of an Al-Si alloy with 20 wt % silicon. The sample is slowly cooled down from 900 oC to room temperature. The Al-Si phase diagram is given below. (a) What is the melting point of Al and Si? (b) Upon cooling, at what temperature will the first solid appear and what is the phase of the first solid, and what is the composition of the first solid? (c) At 600oC, what phases do you have and what is the mass of each phase? (d) At 578oC, what phases do you have and what is the mass of each phase?

At what temperature does the first liquid phase form at 90% Ni? T(°C) 1600 1500 1400 1300 1200 1100 1000, L (liquid) L+α solidus liquidus 80 100 20 40 60 80 wt% Ni

700 L 600 м a + L Mg, Pb 500 O 465 400 Mg Pb 300 200 a + Mg Pb B+ Mg,Pb 100 20 40 60 80 100 Mg Composition (wt% Pb) Pb Mg Pb Figure 1 The Mg/Pb phase diagram 1. The Pb% to gain alpha grain with Mg2Pb on the boundary of alpha at the room temperature. ANSWER: From the diagram, the required Pb% is 40% since it corresponds to the boundary eutectic. 2. Is it possible to gain beta grain with Mg2Pb on the boundary at the room temperature of an alloy? Explain ANSWER: It is not possible to get grain on Mg2Pb since the eutectic composition will be varied, which in turn will lose the composition strength. 3. What is the mount of alpha in an alloy (50%Mg +50%Pb) at temperature of 500oC? ANSWER: The mount of alpha in the alloy 50% Mg + 50 % Pb at 500 C will correspond to the eutectic composition at the 70% of Pb, i.e; the mount = 70/100 = 0.7 % of Pb 4. What is the mount of alpha in the alloy (50%Mg +50%Pb) at the room temperature? ANSWER: The mount of alpha in the alloy 50% Mg + 50 % Pb at room…

A 42 wt% Pb-58 wt% Mg alloy is heated to a temperature within the α + liquid phase region shown in Animated Figure 9.20. If the composition of the α phase is 30 wt% Pb, determine (a) The temperature of the alloy