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 3P
(a)
To determine
The various intermetallic compounds.
(b)
To determine
The use of metallographic microscopy.
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Describe the cooling of a peritectic alloy with the concentration
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Visualize a substance with the following points on the phase diagram: a triple point at 0.05 atm and 150 K; a normal melting point at 175 K; A normal boiling at 350 K; and a Critical point at 2.0 atm and 450 K. The solid liquid line is normal. For this complete the following:
a. Describe what one would see at pressures and temperatures above 2.0 atm and 450 K.
b. Describe the phase changes from 50 K to 250 K at 1.5 atm
At what temperature does solidification form at 10% Ni?
T(°C)
1600
1500
1400
1300
1200
1100
1000,
Answer:
L (liquid)
L+a
solidus
liquidus
20 40 60
wt% Ni
86 100
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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- The relation between dendrite arm spacing (X) and the solidification time (t) is given by X Al" a. b. X At " X At " d X- At"arrow_forwardA binary alloy having 28 wt% Cu and balance Ag solidifies at 779°C. The solid consists of two phases a and B. Phase a has 9% Cu whereas phase ß has 8 % Ag at 779°C. At room temperature these are pure Ag and Cu respectively Sketch the phase diagram. Label all phases and temperatures. The melting points of copper and silver are 1083 and 9610 respectively s Pà) Estimate the amount of a and B in the above alloy at 779°C and at room temperature.) b) Calculate the mass fraction of phases for 40% Cu alloy at 300 °C and TR c) What is the composition of the alloys in (b)arrow_forwardExercises: Sketch the phase diagram of a substance with the following points on the phase diagram: a triple point at 0.5 atm and 150 K; a normal melting point at 175 K; a normal boiling point at 350 K; and a critical point at 2.0 atm and 450 K. The solid liquid line is “normal” (meaning positive sloping). 1. Label the area 1, 2, and 3, and points T and C on the diagram. 2. Describe what one would see at pressures and temperatures above 2.0 atm and 450 K. 3. Describe the phase changes from 50 K to 250 K at 1.5 atm. 4. What exists in a system that is at 1 atm and 350 K? 5. What exists in a system that is at 1 atm and 175 K? Sketch the cooling curve of a substance with the following points: (A) 85 OC and 0 min, (B) 60 OC and 2 min, (C) 60 OC and 5 min, (D) 20 OC and 8 min, and (E) 20 OC and 11 min. Label each line 1, 2, 3, and 4 and each point A, B, C, D, and E. 1. What phase(s) exist at each of the numbered sections? 2. At what…arrow_forward
- 1. An FCC iron-carbon alloy initially containing 0.20 wt% C is carburized at an elevated temperature and in an atmosphere that gives a surface carbon concentration constant at 1.0 wt%. If after 49.5 h, the concentration of carbon is 0.35 wt% at a position 4.0 mm below the surface, determine the temperature at which the treatment was carried out. 2. Consider a metal single-crystal oriented such that the normal to the slip plane and the slip direction are at angles of 60° and 35°, respectively, with the tensile axis. If the critical resolved shear stress is 20.7 MPa, will an applied stress of 45 MPa cause the single crystal to yield? If not, what stress will be necessary?arrow_forwardHow much time in seconds is required for austenite to transform to 50% pearlite at 600°C?arrow_forward(a) Figure 5 shows a phase diagram for the Nb-80 wt% W alloy which is solidified under under the nonequilibrium condition. Evaluate (i) the liquidus temperature (ii) the non-equilibrium solidus temperature (iii) the freezing range (iv) the composition of the first solid form during solidification (v) the composition of the last liquid to solidify (vi) the phase(s) present, the composition of the phase(s) and the amount of the phase(s) at 3000 °C (vii) the phase(s) present, the composition of the phase(s) and the amount of the phase(s) at 2800 °C.arrow_forward
- 11-42 Cooling curves are obtained for a series of Cu-Ag alloys (Figure 11-33). Use this data to produce the Cu-Ag phase diagram. The maximum solubility of Ag in Cu is 7.9%, and the maximum solubility of Cu. in Ag is 8.8% The solubilities at room temperature are near zero. 1200 S0% Ag 71,9% Ag 1100 1000 100% Ag 900 J00% Cu 90% Ag 800 84 A 20% Ag 700 Time Figure 11-33 Cooling curves for a series of CurAg alloys (For Problem 11-42). Temperature (C)arrow_forwardwhat are the stages of solidifaction in a casting process? when do those happen?what is under cooling?arrow_forwardSilicon having a melting point of 1412°C forms an alloy with aluminum having a melting point of 660°C. The solidification temperature of the alloy is observed to be at 580°C at which the mass fraction of silicon is 0.125 Represent the liquid-solid diagram from the given data. Determine the phases present in the following conditionsarrow_forward
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