Consider an alloy at composition C 1, just above the eutectic temperatdre. What are the phases present?C,liquida+\liquidß+liquida + B100%100%compositionABAlpha and liquidAlpha, beta, and liquidO Beta and liquidO Alpha and betatemperature

Consider an alloy at composition C 1, just above the eutectic temperatdre. What are the phases present? C, liquid a+ \liquid B+ liquid B a + B 100% composition 100% B A Alpha and liquid Alpha, beta, and liquid O Beta and liquid O Alpha and beta temperature

Consider an alloy at composition C 1, just above the eutectic temperatdre. What are the phases present? C, liquid a+ \liquid B+ liquid B a + B 100% composition 100% B A Alpha and liquid Alpha, beta, and liquid O Beta and liquid O Alpha and beta temperature

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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rams A copper-nickel alloy of composition 75 wt% Ni-25 wt% Cu is slowly heated from a temperature of 1300°C (1573). (a) At what temperature does the first liquid phase form? (b) What is the composition of this liquid phase? T(°C) 1600 (c) At what temperature does complete melting of the alloy occur? (d) What is the composition of the last solid remaining prior to complete melting? 1500 1400 1300 1200 1100 1000 17 / 17 0 L (liquid) 20 liquidus + a solidus 100% 40 α (FCC solid solution) 60 80 100 wt% Ni 17
2. Determine the amount of liquid phase in the a Cu-50% Ni alloy at 1300°C, % L 1500 1400 L. C +L 58 1300 1200 1100 1000 Cu 20 40 60 80 Ni Weight percent nickel Temperature (°C)
1. Given the time-temperature transformation diagram, what would be the phases present for a 1.13 wt. % C steel with no alloying elements. calculate the amount of pro eutectoid product, where applicable (at the bottom) A) quenched in cold water to 650 C in 0.1 seconds, then held at 650 C for 5 seconds, then quenched to 400 C, held at 400C for 60 seconds, and finally quenched to room temperature B. Necessary Steel Phase Diagram Calculations to determine the amount of pro eutectoid product:
In Figure 1 (phase diagram), an alloy composition of 95 wt% Mg and 5 wt% Al is cooled from 700 C to 475 C. An analysis of the resulting ε solid-phase composition reveals that it has a higher Mg content than is anticipated by the phase diagram.a) Explain why this might be the case and how your reasoning results in the higher-than-expected Mg content.b) Provide a sketch showing the likely distribution of Mg content within the volume of ε solid-phase.
For an alloy containing 20 wt % Ag, refer to the Cu-Ag phase diagram given in the Figure: What is the melting point of Cu in °C? What are the relative amounts(in %) of the existing phases at 900°C? Define the Eutectic point in terms of °C and the composition % of Ag.
Referring to Figure 1, please answer the following [NOTE: SHOW YOUR WORK on Figure 1]:a. provide the specific name for the phase boundary lines denoted by A and B. b. identify the phases present at equilibrium in the phase fields denoted by C, D, and E. c. identify the specific name for the point denoted by F. d. What is the maximum solid solubility of Mg in Al? At what temperature does it occur? e. An Al-Mg alloy (10 wt% Mg, 90 wt% Al) is heated slowly (to insure equilibrium) from a temperature of 200 C: i. At what temperature does the first liquid phase form? ii. What is the composition of the liquid phase at the temperature in part i.? iii. At what temperature does complete melting (no solid phase remaining) occur? iv. What is the composition of the last solid remaining prior to complete melting? f. Using the equilibrium phase diagram of Figure 1, identify the phases present, their compositions, and their relative mass fractions at equilibrium for a 70 wt% Mg – 30 wt% Al…
Consider the phase diagram below. The three points A, B, and C are at concentrations of 26.4, 31.3, and 34 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 A B C L + a C1 S liquidus L + a solidus a (solid) 50 wt% Ni a. Walpha=0.21; WL=0.33; Walpha/WL = 13.17 b. Walpha=0.09; WL=0.32; Walpha/WL = 15.00 c. Walpha=0.07; WL=0.46; Walpha/WL = 11.17 d. Walpha=0.14; WL=0.37; Walpha/WL = 9.00
Is it possible to have a copper-nickel alloy that, at equilibrium, consists of a liquid phase of composition 20 wt% Ni-80 wt% Cu and also an a phase of composition 37 wt% Ni-63 wt% Cu? If so, what will be the approximate temperature of the alloy? If this is not possible, explain why. Temperature (°C) 1600 1500 1400 1300 1200 1100 1000 0 1085°C (Cu) 20 Liquid Liquidus line L B 40 a+L a A 60 Composition (wt% Ni) (a) 1455°C Solidus line 80 2800 2600 2400 2200 2000 100 (Ni) Temperature (°F) Temperature (°C) 1300 1200 20 Liquid Tie line. a + Liquid a 1 KR I 1 1 B ↑ Co a + Liquid -S 30 CL Composition (wt% Ni) (b) 40 1 Ca a 50
A hypothetical eutectic phase diagram for metals A and B shows that cooling a liquid melt with a concentration of 50 wt% A-50 wt% B to just below 625 °C (eutectic isotherm temperature) results in simultaneous formation of alpha and beta phases. The phase diagram also shows that alpha (A rich) and beta (B rich) phases exist at left and right extremes of the phase diagram, respectively. At the eutectic isotherm temperature, the maximum solubility of B in A and A in B is 10 wt% and 5 wt%, respectively. The phase diagram does not have any intermetallic compounds. A new solid alloy is made by melting together 86 gr of a 40 wt% A-60 wt% B alloy with 136 gr of 65 wt% A-35 wt% B alloy followed by cooling the melt to 400 °C. If the new alloy is heated up from 400 °C to just below 625 °C, answer the following questions: a. Calculate the overall alloy composition. b. Determine phases present and calculate their respective masses. Calculate the masses of the primary phase, eutectic phase, and…
Composition lat% N 40 60 100 1600 2800 1500 1453 C 2600 Liquid 1400 Solidus line Liquidua line 2400 1300 1200 2200 1100 1085 C 2000 1000 20 40 100 Composition (wt N (NO What is the amount for each phase in 1kg of a 50% Ni-50% Cu alloy at temperatures of 1400, 1300, or 1200 degrees C for point A and point B? Temperature ('C) Temperature ("F)
A 10 30 70 1) For an A-B alloy of composition 25 wt% B (i) Draw the microstructure at T (just above the eutectoid temperature) and calculate the fraction of each phase in the microstructure. (ii) Draw the microstructure at T (just below the eutectoid temperature) and determine the amount of each phase, i.e., fraction of proeutectoid alpha, eutectoid alpha and eutectoid beta. 2) Provide a brief summary of phase transformations which are often observed in the iron-carbon alloy system due to various heat treatment procedures carried out to tune the microstructure. Compare mechanical strength and ductility of the materials/microstructures that form as a result of such heat treatment processes.
Calculate the amounts and compositions of phases at 726oC in a Fe-0.6% C alloy cooled under equilibrium conditions. Disregard the amounts of proeutectoid phases. A. 77.3% α, 22.7% Fe3C; C in α = 6.7% and C in Fe3C = 0.02% B. 91.3% α, 8.7% Fe3C; C in α = 0.02% and C in Fe3C = 6.7% C. 77.3% α, 22.7% Fe3C; C in α = 0.02% and C in Fe3C = 6.7% D. 91.3% α, 8.7% Fe3C; C in α = 0.05% and C in Fe3C = 8.4% E. None of the mentioned