A 35 wt% Pb-65 wt% Mg alloy is heated to a temperature within the a + liquid phase region shown in Animated Figure 9.20. If the composition of the a phase is 20 wt% Pb, determine (a) The temperature of the alloy °℃ (b) The composition of the liquid phase i %wt Pb (c) The mass fraction of the a phase i (d) The mass fraction of the liquid phase

A 35 wt% Pb-65 wt% Mg alloy is heated to a temperature within the a + liquid phase region shown in Animated Figure 9.20. If the composition of the a phase is 20 wt% Pb, determine (a) The temperature of the alloy °℃ (b) The composition of the liquid phase i %wt Pb (c) The mass fraction of the a phase i (d) The mass fraction of the liquid phase

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

See similar textbooks

Similar questions

QI/ Draw a thermal equilibrium diagram for the binary alloy system (Si –Au), from the following data:- a- Si melts at 1414 °C, and Au melts at 1064 °C , and identify all phases are present in the diagram. b- Eutectic is formed at 360°C containing 20 Wt% Si -80 Wt% Au . c- Determine the amount of each phase for the alloy which consist 60 Wt% Si- 40Wt % Au at 1200 °C and 800 °C ,then determine the amount of eutectic at 200 °C?
An alloy system consists of two metals A&B which are soluble in each other in all proportions in the liquid state, but completely insoluble in the solid state. The melting point of metal A is 425°C and B is 375°C. The lowest melting point (Eutectic) is 230°C at 40%B. Choose the correct answers for the following sentences: the phases present in the equilibrium diagram are: OL& A & B O A & B O A&L B& L
Pravinbhai
An FCC iron–carbon alloy initially containing 0.25wt% C is carburized at an elevated temperature and in an atmosphere wherein thesurface carbon concentration is maintained at 1.0 wt%. If after 55.0 h the concentrationof carbon is 0.35 wt% at a position 5.0 mm below the surface, determine thetemperature at which the treatment was carried out.
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.
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
Should correct
For the lead-tin system:(a) Determine the proportions of liquid and solid phases for the 40% Sn composition ofthe lead-tin system at temperatures 2500?, 2000?, ??? 1500?. (b) Draw the development of microstructure along the dashed line at points A,B,C, andD.
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…
700 L 600 M a + L Mg, Pb 500 P 465 400 L Mg Pb 300 200 a + Mg Pb B+ Mg Pb 100 20 40 60 80 100 Mg Composition (wt% Pb) Pb Mg,Pb Using the above figure, sketch neatly the microstructure of the alloys (given in the below table) and determine the amount of each phase presented. Structure of the alloys at different compositions 田 Compositions &temperature 10%Pb,90%Mg Structure Structure Compositions &temperature 20%Pb, 80%Mg @400°C @0°C My.Pb 50%Pb,50%Mg 67%Pb, 33%Mg @0°C Mgz PB @0°C 81%Pb,19%Mg 90%Pb,10%Mg @200°C @0°C Temperature ("C)
Consider the phase diagram below. The three points A, B, and C are at concentrations of 27, 31.9, and 33.8 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 ABC L + a C1 30 S C2 liquidus 40 L + a solidus α (solid). O a. Walpha=0.12; WL=0.41; Walpha/WL = 9.41 O b. Walpha=0.27; WL-0.26; Walpha/WL = 11.11 O c. Walpha=0.15; WL-0.26; Walpha/WL = 11.80 Od. Walpha=0.20; WL-0.31; Walpha/WL = 7.33 50 wt% Ni