If 500 g of a 40 wt % Ag - 60 wt % Cu alloy is slowly cooled from 1000°C to just below 780°C: (a) How many grams of liquid and proeutectic alpha are present at 850°C? (b) How many grams of liquid and proeutectic alpha are present at 780°C + AT ? (c) How many grams of alpha are present in the eutectic structure at 780°C - AT ? (d) How many grams of beta are present in the eutectic structure at 780°C - AT ? Atom

If 500 g of a 40 wt % Ag - 60 wt % Cu alloy is slowly cooled from 1000°C to just below 780°C: (a) How many grams of liquid and proeutectic alpha are present at 850°C? (b) How many grams of liquid and proeutectic alpha are present at 780°C + AT ? (c) How many grams of alpha are present in the eutectic structure at 780°C - AT ? (d) How many grams of beta are present in the eutectic structure at 780°C - AT ? Atom

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

If 500 g of a 40 wt% Ag-60 wt% Cu alloy is slowly cooled from 1000°C to just below 780°C (see Fig. 8.32): i. How many grams of liquid and proeutectic alpha are present at 780°C + AT? ii. How many grams of alpha and beta are present in the eutectic structure at 780°C - AT ? Atomic percent silver "C 10 20 30 40 50 60 70 80 90 F 1100 T 1084.5 1900 1000 961.93 1700 1600 1400 1200 1000 850 900- 800-a 700 600 500 400 L 10 Cu Figure 8.32 7.9 L+a 1 20 1 30 L 780 71.9 1 40 50 60 70 Weight percent silver- L+B 91.2 80 1 90 B Ag
A 50%Ni-50%Cu alloy is slowly cooled from 1400°C to 1200°C. Determine: At 1300°C, estimate the weight fractions of the solid and liquid.
A 1.5-kg specimen of a 88 wt% Pb-12 wt% Sn alloy (Animated Figure 9.8) is heated to 220°C; at this temperature it is entirely an a- phase solid solution. The alloy is to be melted to the extent that 50% of the specimen is liquid, the remainder being the a phase. This may be accomplished either by heating the alloy or changing its composition while holding the temperature constant. (a) To what temperature must the specimen be heated? i °C (b) How much tin must be added to the 1.5-kg specimen at 220°C to achieve this state? i kg
A 50 wt% Pb-50 wt% Mg alloy is slowly cooled from 700 °C (1290 °F) to 400 °C (750 °F). (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? Temperature (°C) 700 600 500 400 300 200 100 2 0 0 (Mg) 560°C First solid (21 wt% Pb) α 20 465°C 5 a + L Composition (at% Pb) 40 10 L a + Mg₂Pb 20 60 Composition (wt% Pb) Last liquid (67 wt% Pb) 30 Mg₂Pb 40 T T L + Mg₂Pb M 18 80 L + Mg₂Pb 70 100 B B+ Mg₂Pb T B + L D T 1200 1000 800 600 400 200 100 (Pb) Temperature (°F)
The lead and tin are partially dissolved in each other in solid state although they completely dissolved in liquid state. They form eutectic from solid solutions alfa (a) and beta (B) at alloying composition 62% tin and 38% lead, the eutectic forming temperature is 184°C. Alfa contained 20% tin dissolved in 80% lead at 184°C while beta consist of lead dissolved in tin at 184°C. If the 100 g of eutectic contained 45.5 g of alfa at 184°C.Knowing that the melting temperatures of lead and tin are 329°C and 232°C respectively, and the solubility of tin and lead in each other's diminished to zero at room temperature. Answer the following a) Plot the phase diagram for lead-tin system label all phases and temperature. b) What is the composition of beta at eutectic temperature. c) For 40 % lead alloy calculate the phase amount and composition at 350°C, 170°C, and Tr
Temperature ("C) Temperature ($1 Consider 1 kg of Copper - Silver alloy (Cu - Ag) containing 75 wt% Ag. The phase diagram of the alloy is shown in the figure below. The alloy is cooled to 778 °C (just below the eutectic temperature). Calculate the mass in kg of the eutectic phase B (phase B that appears during the eutectic reaction) that forms? Composition (at% Ag 20 40 60 100 2200 80 1200 2000 Liquidus 1000 LIquid 1800 Solidus 1600 800 779°C (T 80 91.2 1400 IC. 1200 600 Solvus T000 400 800 200 20 40 80 100 (Cu) Composioon wt A
A 50 wt% Ni–50 wt% Cu alloy is heated to a temperature within the a liquid-phase region. If the composition of the alpha phase is 58 wt% Ni, determine (b) the composition of the liquid phase in wt% Ni
A 45 wt% Pb-55 wt% Mg alloy is rapidly quenched to room temperature from an elevated temperature in such a way that the high- temperature microstructure is preserved. This microstructure is found to consist of the a phase and Mg2Pb, having respective mass fractions of 0.65 and 0.35. Determine the approximate temperature from which the alloy was quenched. Use Animated Figure. °℃
In a binary Fe-Fe3C system, what is a transformation that occurs when cooling an austenistic mixture of 2% C by weight from 1100°C to below the eutectoid temperature? What is the microstructure, and how is it formed? What are the total and partial phases? Given:Eutectoid temperature=723°C; Eutectoid concentration=0.76% C; Limit concentration of ferrite=0.022%; Limiting concentration of cementite: 6.7%.
A 609 g eutectoid steel ( about 0.8%C) is heated to 1,002 C and cooled slowly through the eutectorid temperature. This results in the formation of cementite Fe3C (6.67%C) and ferrite (0.025%C). Calculate the number of grams of cementite that form in the steel.
1000 grams of steel containing 1.5 weight percent carbon is heated to complete melting. After equilibrium is achieved, we slowly cool the alloy. Determine the amount of pure iron or pure carbon we need to add to this 1000 gram alloy if we need to have 100% pearlite at 720C upon slow cooling from complete melt.
A 80%Ag-20%Cu alloy is slowly heated from room temperature (25°C).Determine (1) At what temperature does the first liquid phase form and what is this liquid’s composition?(2) At what temperature does all solid melt and what is the last remaining solid’s composition?