Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 4, Problem 7RQ
To determine
Reason of no use of pressure-temperature phase diagram for many engineering applications.
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Provide a hypothetical procedure for measuring the phase diagram at different temperatures.
Q1 / Two metals Beryllium (Be) and Silicon (Si) have melting points 1282°C and 1414 °C
respectively, are completely soluble as liquids but completely insoluble as solids . They form a
eutectic at 1090°C containing 61 wt% Si -39wt% Be?
Determine the following:-
1- Draw the thermal equilibrium phase diagram and identify all phases are present in
diagram ,then sketches what happens in microstructure when the alloys containing , a-
10wt% Si, b-70wt%Si , solidify completely.
2- Determine the composition and the amount of each phase for the alloy which contain 15
wt% Si-85wt% Be at 1150°C If the alloy is hypoeutectic
determine the amount of eutectic at 600 °C?
or hypereutectic and
Which line on the above phase diagram corresponds to the Solid-Liquid transition?
Answer
Chapter 4 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 4 - What kind of questions can be answered by...Ch. 4 - Prob. 2RQCh. 4 - Supplement the examples provided in the text with...Ch. 4 - Prob. 4RQCh. 4 - What three primary variables are generally...Ch. 4 - Use the pressure–temperature diagram for water...Ch. 4 - Prob. 7RQCh. 4 - What form of equilibrium phase diagram is most...Ch. 4 - What is a cooling curve?Ch. 4 - Prob. 10RQ
Ch. 4 - Prob. 11RQCh. 4 - Prob. 12RQCh. 4 - Prob. 13RQCh. 4 - What types of changes occur upon cooling through a...Ch. 4 - Prob. 15RQCh. 4 - What is a tie�line? For what types of phase...Ch. 4 - What points on a tie�line are used to determine...Ch. 4 - Prob. 18RQCh. 4 - What is a cored structure? Under what conditions...Ch. 4 - What is the difference between a cored structure...Ch. 4 - Prob. 21RQCh. 4 - Prob. 22RQCh. 4 - Prob. 23RQCh. 4 - Prob. 24RQCh. 4 - For the various three�phase reactions, what does...Ch. 4 - Prob. 26RQCh. 4 - Prob. 27RQCh. 4 - Prob. 28RQCh. 4 - Prob. 29RQCh. 4 - Prob. 30RQCh. 4 - Prob. 31RQCh. 4 - Prob. 32RQCh. 4 - Prob. 33RQCh. 4 - Prob. 34RQCh. 4 - Prob. 35RQCh. 4 - Prob. 36RQCh. 4 - Prob. 37RQCh. 4 - What is carbon equivalent, and how is it computed?Ch. 4 - Prob. 39RQCh. 4 - Prob. 40RQCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Consider the manufacture of a fishhook beginning...Ch. 4 - If a stainless steel were to be used, what type of...Ch. 4 - A wide spectrum of coatings and surface treatments...Ch. 4 - Prob. 1.4CSCh. 4 - Prob. 2.1CSCh. 4 - Prob. 2.2CSCh. 4 - Prob. 2.3CSCh. 4 - Prob. 2.4CS
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- a- Give the name for this type of phase diagram, and what is the main feature for this type? b- Pointed the phases for this diagram. c- Draw the cooling curve for each of pure metals and alloys (40%B -60%A), (70%B-30%A). d- Determine the weight percentages of the phases for (30% A -70% B) at 350 C. 700, 600 500- 400- 300 200 100 10 20 30 40 50 60 70 80 90 100 % Metal B Temperature "Carrow_forwardConsider the phase diagram below. The three points A, B, and C are at concentrations of 27, 31.9, and 33.8 wt% Ni respectively. The ends of the tie line are at C1 = 25% wt% Ni and C2 = 35 wt% Ni. What are the weight fractions of the alpha phase at A and the L phase at B, as well as the alpha phase/L phase ratio at C? T(°C) 1300-L (liquid) 1200 20 ABC L + a C1 30 S C2 liquidus 40 L + a solidus α (solid). O a. Walpha=0.12; WL=0.41; Walpha/WL = 9.41 O b. Walpha=0.27; WL-0.26; Walpha/WL = 11.11 O c. Walpha=0.15; WL-0.26; Walpha/WL = 11.80 Od. Walpha=0.20; WL-0.31; Walpha/WL = 7.33 50 wt% Niarrow_forwardUse the phase diagrams for Cu-Ni and Cu-Ag systems below to answer the question: Based on the mechanism, would you expect a solution containing 80 wt% Cu to be stronger if the remaining 20% of the alloy was Ni or Ag? Briefly explainarrow_forward
- Imagine a substance with the following points on the phase diagram: a triple point at .5 atm and -5ºC; a normal melting point at 20ºC; normal boiling point at 150ºC; and a critical point at 5 atm and 1000ºC. The solid liquid line is “normal” (meaning positive sloping). For this, complete the following: 1. Describe what one would see at pressures and temperatures above 5 atm and 1000ºC. 2. Describe what will happen to the substance when it begins in a vacuum at -15 ºC and is slowly pressurized. 3. Describe the phase changes from -80ºC to 500ºC at 2 atm.arrow_forward3- The limited solid solubility Binary phase diagram has many types of reactions like and....... 4- the Crystal Structure of y (Austenite) is J. (12-1394) at 2.44 wt% has fec. 5- The maximum solubility of carbon in austenite, 2 occurs at 1147° C while the maximum solubility "wt% 0.022 W+% of BCC is At 727 oC ******* 6-steel alloys classified according to carbon conctration into.....n) and (hough). which are 7- in polymer structure the long molecules are composed of structural entities called repeat & Cham the along successively repeated and 8-polymer classified according to their molecular structure into hul (30Mark)arrow_forwardIm on part c. Im so confused, how do i know how much is in liquid or vapor phase there is no mention of quality or anything my friend said to look at the properties in the tables but that doesnt help to determine how much r134 is in hwat phase please help me.arrow_forward
- Draw two different types of temperature-composition phase diagrams for an exemplary liquid-solid system, show the important regions and explain the leverage rule on the diagram by deriving the relevant relations.arrow_forwardBI (a) Figure BI below shows the equilibrium phase diagram of hypothetical A - B alloy system. Answer the following questions. (iv) Now assume a melt of Alloy B has a weight of 100 g at a temperature of 652 °C. Maintain the temperature, suggest how to make this melt become a completely solid phase (v) Based on Figure B1, briefly illustrate how to design and achieve a precipitation hardening for A-B alloy. Temperature (°C) 8 700 600 500 400 800 OA 760 °C Line B a/9.5 20 Line A a + L 650 °C 40 Liquid (L) wt%B Figure B1 52.5 a + B 60 B+L 80 93.7 B 100 Barrow_forwardWhat is meant by a phase? Describe an example. And what is the equilibrium phase diagram?arrow_forward
- Using the Tin_Lead phase diagram, at 40% tin at 200C, what is the composition of the liquid phase? and how much of hte material is in that phsae?arrow_forwardThe figure below shows Pb-Sn phase diagram. What is the composition of Pb and Sn at point 1? 1200 1000 Liquid a +L 779 C (Tg) B+L 6 800 8.0 71.9 G 91.2 600 400 200 20 40 60 80 100 (Pb) Composition (wt% Sni (Sn) Callister Jr., W.D., 2007 O a. 80 wt % Sn and 20 wt % Pb O b. 10 wt % Sn and 90 wt % Pb O c. 90 wt % Sn and 10 wt % Pb O d. 20 wt % Sn and 80 wt % Pb Temperature ("C)arrow_forwardPhase Diagrams: You are given the lead tin (Pb-Sn) phase diagram. Below the eutectic isotherm is identified as the two phase region a + B. a) At 30wt % Sn, in the circles below draw the microscopic observations evolving at 3000C, 2250C, and 1000C for this hypoeutectic alloy. b) At a temperature just above the isotherm at 1830C, for the 30 wt% Sn Alloy, calculate the fractions of each phase present at equilibrium and the corresponding composition of each phase.arrow_forward
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