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 34RQ
To determine
Description of the pearlite and its structure.
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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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- Explain two important differences between martensitic and pearlitic transformations.arrow_forward2. (a) Nickel-based alloys are used for gas turbine blades in aerospace engines. Briefly discuss the characteristics that make these alloys the choice for this application. (b) Single-crystal technology is applied to nickel alloys that are used as gas turbine blades in aerospace engines. With the aid of sketches describe how a single-crystal casting can be manufactured and explain why a single-crystal casting is likely to have superior creep resistance than a directly-solidified one. (c) Demonstrate the application of the Ten-percent Rule by calculating the approximate tensile strength and elastic modulus in the 0˚ direction of a carbon-fibre reinforced polymer composite if the strength and elastic modulus in the 0˚ single ply are 3620 MPa and 143 GPa respectively. The lay-up sequence of the composite is [02/+45/-45/902]s.arrow_forwardWhich of the following is a characteristic of amorphous solid? a. unsymmetrical structure b. definite packing c. sharp melting point d. exhibits cleavagearrow_forward
- Questions: Considering that the steel contains 0.1 – 0.8 wt% carbon by weight, how can you account for the high percentage of pearlite in the microstructure? (1) Hint: See Figure 3, the enlarged picture of pearlite and consider differences in atomic weight (Fe;C), and overall composition of pearlite. 20 μη From Metals Handbook, Vol.9, 9th edition, Metallography and Micrestructures, 1985. Heproduced by permission of ASM International, Materials Park, OH. Figure 3 High magnification micrograph of pearlitearrow_forwardQuestion 2: For the given Fe-C phase duagram (a) Compute the mass fractions of a ferrite and cementite in pearlite. (b) Compute the mass fraction of eutectoid ferrite in an iron-carbon alloy that contains 0.43 wt% C. (c) The mass fractions of total ferrite and total cementite in an iron-carbon alloy are 0.88 and 0.12, respectively. Is this a hypoeutectoid or hypereutectoid alloy? Why? Temperature (°C) 1600 1400 1200 1000 800 600 400 1538°C (Fe) 912°C M+R -1493°C 1394°C 7. Austenite 0.76 0.022 a, Ferrite y+L 2 2.14 Composition (at% C) 15 10 1147°C a + FezC L 3 Composition (wt% C) 4.30 Y+Fe3C 727°C 20 Cementite (Fe3C). 25 2500 2000 1500 1000 6.70 Temperature (°F)arrow_forwardWhat is the marcosopic structure of metallic in low carbon and then high carbon steels .arrow_forward
- Sketch a phase diagram for two soluble components. Show the melting tem-perature of each element. Label all axes, curves, and zones.arrow_forwardwWucsuons © 1. Differentiate between the following transformations Pearlite, (b) Bainitic (c) Martensitic, based on Diffusion, Temperature range, Nuclei, Kinetics of reaction, Crystallography, Density of dislocation, Surface relief, and Growth rate.arrow_forwardDiscuss under what circumstances martensite is formed and highlight its effect on mechanical properties.arrow_forward
- Question 3: Indicate which of the following microstructures corresponds to Pearlite Bainite Spheroidite_ Martensite What is the reason(s) behind your selection? (b) and Tempered Martensite (e) 10 μm 1 μm (d) 10 μπ 10 µmarrow_forwardIs it correct to say Thick pearlite is not as strong as thin pearlite?arrow_forwardSteel is an alloy of iron and carbon. Briefly explain which three phases steel can have depending on the temperature. Enter the name and crystal structure as well as the temperature range for each phase.arrow_forward
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