Q1) The solid phase of a point (in the two-phase region) in the Bi-Sb alloy contains 80 at% of Sb. The fraction of the liquid phase of this point is approximately 0.27. From the figure, find the following information of this point: 650 630.6 °C 1- The temperature. 2- The overall alloy composition (C.). 3- The composition of the liquid phase. 4- The fraction of the solid phase. 600 550 Liquid O 500 450 400 350 300 271.4 °C 250 200 0. 90 100 Sb 10 20 30 40 50 60 70 80 Bi Atomic percent Sb Temperature (°C)

Shown to the right is the solid-liquid phase behavior for mixtures of component A and component B at 1 atm. Use the phase diagram to answer the following questions. a) Specify the melting point of substance B at 1 atm b) What is the maximum composition (mole fraction) of component B that is possible for the mixture to exist in phase S2? At what temperature does this occur? c) 20mol of component A and 180mol of component B are mixed at 350°C and 1 atm. The mixture is cooled at constant pressure to 200°C. i) What phases are present at the final state? ii) What is the composition of each phase at the final state? iii) What is the number of moles of each phase at the final state?

1 Al-Li Aerospace Alloys When a small amount of Li is added into Al to create an Al-Li alloy, the two elements typically do not mix homogeneously. Instead, most of the material is nearly-pure Al, while some small regions are Li-rich.¹ (These small regions are called precipitates and they are responsible for giving Al-Li alloys much better properties for aerospace applications relative to pure Al. We'll learn more about the alloying process and about precipitates later in the course.) The Li-rich regions have the chemical formula Al3Li and belong to the cubic crystal system.² In the unit cell, the Li atoms are located at 000, while the Al atoms are located at 110, 101, and 01121. (a) Draw the unit cell of Al3Li. (b) Which of the crystal structures from Callister Chapter 3 does this resemble? Why do we not call it that structure? (c) Given that the lattice parameter is 0.401 nm, what is the density of Al3Li?

1. four processes. 2. Fill out the blanks by labeling the phase regions. 3. Identify the Indicate an in- termediate compound, if any. 3. Temperature (°C) 1600 1400 1200 1000 800 600 400 1538°C 0 (Fe) -1493°C 1394°C 912°C y, Austenite 1 2 0.16 5 0,022 a, Ferrite A N 2.14 Composition (at% C) 15 10 3 1147°C L4 3 4 Composition (wt% C) 4.30 727°C Sketch the microstructure at A, label phases, figure out compositions. 20 Cementite (Fe3C). 5 6 25 6.70

A Pb-30% Sn alloy is cooled from 300°C to 50°C. a) What phases are present for this alloy at 50°C? b) How much of each phase is present at 50°C? c) What is the primary phase and its amount for this alloy at 50°C? Composition (at% Sn) 20 40 60 80 100 327°C 600 300 Liquid 500 232°C a + L 200 ß + L 400 183°C 18.3 61.9 97.8 300 100 a + B 200 100 40 60 80 100 (Pb) Composition (wt% Sn) (Sn) Temperature (°C) 20 Temperature (°F)

100 atm 1 atm 0.118 atm 114 °C 184 °C 535 °C Temperature (not to scale) a.) Use the above generic phase diagram, clearly identify where you would find the following: Gas, Liquid, Solid, Triple Point, Draw arrows and label to indicate the six transitions (melting, freezing, sublimation, deposition, vaporization and condensation) b.) Based on the above phase diagram, what phase would you be in at a pressure of 50 atm and 300°C? c.) Based on the above phase diagram at what temperature in °C would vaporization occur under normal conditions? d.) If the pressure was 0.050 atm and 425°C, what phase would you be in? e.) If the pressure was 0.118 atm and temperature was 114°C, what phase(s) would you be in? f.) At approximately what temperature would the normal freezing point be in °C? g.) If the pressure was 0.105 atm and starting at a temperature of 32°C to 450°C what phase changes would occur (put in increasing temperature order). Pressure (not to scale)

Answer part (iv) and (v)

Use the Lead-Tin (Pb-Sn) phase diagram below to answer the following questions: Place the following microstructures in the correct order of formation for slowly cooling a 98 wt% Sn alloy from 300 °C to room temperature (point A to point B).

help pls A two-phase phase diagram is shown. Answer the following questions t -1300 1500+ Temperature 1100 0 34 54! 166 482 80 Composition of Ni % 20 What is the composition (in % Cu) of the solid phase corresponding to the red dot in between the solidus and liquidus lines in the phase diagram? Just write the number. Do not write the % symbol. Question 17 2.33 100 An alloy is being made with 66% Ni and 34% Cu. When it is cooled from 1500°C to the temperature corresponding to the red dot in the phase diagram, how many kg of liquid is present in the mixture?

Hi i keep getting these wrong