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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- In a binary phase diagram ( pressure omitted) what is the maximum number of phases that can coexist for at least one degree of freedom?arrow_forwarda- 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_forward
- Determine the missing properties and phase descriptions in the following table for water.arrow_forwardImagine 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_forwardCan you draw on the sketch and show all stepsarrow_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_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_forwardWhat is meant by a phase? Describe an example. And what is the equilibrium phase diagram?arrow_forward
- BI (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_forwardi need the answer quicklyarrow_forwardUsing 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_forward
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