EBK MANUFACTURING ENGINEERING & TECHNOL
7th Edition
ISBN: 8220100793431
Author: KALPAKJIAN
Publisher: PEARSON
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Chapter 5, Problem 23QLP
To determine
Why is the control of the structure of an ingot important?
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How supersaturation and its rate of change over time can affect the nucleation and growth? (detalhed)
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Chapter 5 Solutions
EBK MANUFACTURING ENGINEERING & TECHNOL
Ch. 5 - What are the major categories of ferrous alloys?Ch. 5 - Prob. 2RQCh. 5 - List the basic raw materials used in making iron...Ch. 5 - List the types of furnaces commonly used in...Ch. 5 - List and explain the characteristics of the types...Ch. 5 - Prob. 6RQCh. 5 - What is continuous casting? What advantages does...Ch. 5 - What is the role of a tundish in continuous...Ch. 5 - Prob. 9RQCh. 5 - What are trace elements?
Ch. 5 - What are the percentage carbon contents of...Ch. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - What is high-speed steel?Ch. 5 - Prob. 17RQCh. 5 - Prob. 18RQCh. 5 - Prob. 19RQCh. 5 - What effect does carbon content have on mechanical...Ch. 5 - Identify several different products that are made...Ch. 5 - Professional cooks generally- prefer carbon-steel...Ch. 5 - Prob. 23QLPCh. 5 - Explain why continuous casting has been such an...Ch. 5 - Describe applications in which you would not want...Ch. 5 - Explain what would happen if the speed of the...Ch. 5 - The cost of mill products of metals increases with...Ch. 5 - Describe your observations regarding the...Ch. 5 - Prob. 29QLPCh. 5 - Prob. 30QLPCh. 5 - In Table 5.9, D2 steel is listed as a more common...Ch. 5 - List the common impurities in steel. Which of...Ch. 5 - Explain the purpose of the oil shown at the top...Ch. 5 - Recent research has identified mold-surface...Ch. 5 - Prob. 35QLPCh. 5 - List and explain the advantages and disadvantages...Ch. 5 - Conduct an Internet search and determine the...Ch. 5 - Refer to the available literature, and estimate...Ch. 5 - Some soft drinks are now available in steel cans...Ch. 5 - Using strength and density data, determine the...Ch. 5 - The endurance limit (fatigue life) of steel is...Ch. 5 - Using the data given in Table 5.4, obtain the...Ch. 5 - Based on the information given in Section 5.5.1,...Ch. 5 - Assume that you are in charge of public relations...Ch. 5 - Assume that you are in competition with the steel...Ch. 5 - In the past, waterfowl hunters used lead shot in...Ch. 5 - Aluminum is being used as a substitute material...Ch. 5 - In the 1940s (the Second World War), the Yamato...Ch. 5 - Search the technical literature, and add more...Ch. 5 - Referring to Fig. 5.4a, note that the mold has...
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- 1- Examine carefully the microstructure of the specimens? 2- Draw nearly the microstructure with Mag x 150. 3- Define the phases.arrow_forward2) The region showing planar growth during solidification near the fusion zone boundary will exhibit O High temperature gradient and high growth rate High temperature gradient and low growth rate Low temperature gradient and high growth rate O Low temperature gradient and low growth ratearrow_forward2. Solidification is one of the most important processing techniques used in the manufacturing of materials. Discuss the solidification process in terms of its atomic arrangements, nucleation formation, and total free energy change. Why is undercooling required for solidification? Derive an equation showing the total free energy change as a function of undercooling when the nucleating solid has the critical nucleus radius r*What do the terms "primary" and "secondary" processing mean? Sketch a graph of the total free energy of the solid-liquid system changes with the size of the solid to improve your discussion.arrow_forward
- Find the molal flow rates of the distillate and the bottomsarrow_forward8c. describe the extration of elemental composition; s from solid sample. Explain what major concern of the extration is and list two of the methods that can solve the problem?arrow_forwarda) If a nucleus forms with a radius less than critical radius for nucleation, it will disappear. Explain why?b) Explain the free energy diagram; explain how the total free energy of the solid-liquid system changeswith the size of the solid.arrow_forward
- Is this a austenite microstructure if so how can you tellarrow_forwardExplain the concept of zone refining and also explain the refining technique for germanium ingot.arrow_forwardQuestion-6. For solidification of a piece of FCC-metal at 860 °C. The melting point of the metal is 1260 °C. The latent heat of fusion and surface free energy are -2.16 x108 J/m³ and 0.126 J/m², respectively. If nucleation is homogeneous, answer the following questions: (a) Compute the critical radius r* in nm (b) Compute the activation free energy AG* in J (c) If the lattice parameter is 0.26 nm at the melting temperature, compute the number of atoms found in a nucleus of critical size (d) Compute the critical radius at the supercooling degree of 260 K.arrow_forward
- Q1/ In a homogeneous solidification process, assume molten metal solidifies into a spherical nucleus with a BCC structure. The given data are; lattice parameter (0.292 nm), the heat of fusion energy (1.85×10-9 J/m³), latent surface free energy (0.204 J/m²), critical radius (1-35 nm), equilibrium melting temperature (1516 K), and room temperature (27 °C). Calculate the following for this metal; (a) supercooling value temperature (b) activation tree energy (c) number of atoms in a nucleus of critical size.arrow_forwardTranslate the given information in your words, figures given below. Time-temperature cooling curve for the solidification of a small crucible of 50 percent antimony, 50% bismuth alloy.arrow_forwardThe nucleation rate for a phase transformation depends on which factors? Density O Yield Strength O Undercooling (Temperature Energy) O Diffusivity of atoms O Holding time above Temperaturearrow_forward
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