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 22RQ
To determine
The general form of a eutectic reaction.
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A. What is the maximum solid solubility of Cu in Ag? At what temperature? Write the Ag-Cu eutectic reaction, indicating the reactant and product phase(s), and the temperature and the composition (as wt% Cu) at which the reaction takes place.
Define eutectic, eutectoid and peritectic reactions with the examples
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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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- What is degree of reaction? Give expressions of reaction rate equations by degree of reaction.arrow_forwardThe melting point of a adamantiumis 740°C, the associated heat of fusion is 12kJ/mol, and the heat capacities of the solid andliquid phases are 30.2 and 37.8J K−1mol−1,respectively. (a) Calculate the change in molarentropy of adamantium that is heated from 700°Cto 800°C. (b) What is the change in the molarenthalpyarrow_forward3. (a) What is hot shortness? How does it affect the temperature at which eutectic alloys can be used? (b) An intermetallic compound is found for 38 wt.% Sn in the Cu-Sn phase diagram. Determine the formula for the compound. (c) What is an invariant reaction? Show that of for a two-component system the number degrees of freedom for an invariant reaction is zero.arrow_forward
- Consider the magnesium oxide-aluminum oxide phase diagram; ss indicates a solid solution. The radii of Mg2 + and Al3 + are 0.072 and 0.053 nm, respectively. (a) There are two eutectic reactions on the diagram; describe them (temperatures, compositions and phases). (b) Spinel, at temperatures below 1000 °C, is a compound with a composition of 50 mol% Al2O3-50 mol% MgO. For higher temperatures, spinel is stable for a range of compositions. What is the temperature of the congruent fusion? (c) What are the main reasons for the low solubility of Al2O3 in MgO below 1400 °C? (d) Maximum non-stoichiometry on the Al2O3-rich side, in the spinel phase field, occurs approximately 2000 °C and corresponds to approximately 82 mol% (92% w) of Al2O3. Determine the type of gaps defect that is produced and the percentage of gaps that exists in this composition.arrow_forwardFor a 60-40 Pb-Sn alloy, what would the percent of each phase be at 185°C and 180°C?arrow_forwardCopper-rich copper-beryllium alloys are precipitation hardenable. After consulting the portion of the phase diagram shown in Figure below, do the following: Composition (at% Be) 10 15 20 Liquid 1000 866°C 800 -620°C 600 a+ 400 2 3. (Cu) Composition (wt% Bo) (1) Indicate the range of compositions over which these alloys be precipitation hardened. (ii) Describe the heat-treatment procedures (in terms of temperatures) that would be used to precipitation harden an alloy having a composition of your choosing but lying within the range given for part (i). Temperature ("Oarrow_forward
- What are they and what is their application in the production of the following steel: TTT diagrams. Steel Concentration Eutectoidarrow_forwardUsing the following table, draw a melting point diagram and estimate the eutectic temperature and composition: Percent composition Melting point range (°C) 100% A 125-126 75% A-25% B 115-120 65% A- 35% B 128-131 50% A- 50% B 135-140 100% B 151-152 Can you suggest what additional points you need to give a more accurate measure of the eutectic point?arrow_forwardA 50 wt% Pb–50 wt% Mg alloy is slowly cooled from 700°C to 400°C. (a) At what temperature does the first solid phase form? (b) What is the composition of this solid phase? (c) At what temperature does the liquid solidify? (d) What is the composition of this last remaining liquid phase?arrow_forward
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