Question 7:The illustration shows the iron-carbon phase diagram.16001400120010008006004001538°C0(Fe)1493°C1394°C912°C7. Austenite0.760.022a, FerriteY+L2.14Composition (at%C)15101147 Ca+FezCY+FeyC43Composition (wt% C)727 CCementite (FeyC).25002000150010006.70Temperature (°F)e) Describe the changes in phase compositions of a carbon steel witha carbon content of 1 % (weight-%) from 1500°C down to 727°C with thehelp of the attached phase diagram and appropriate equations/reactions.

There is given a iron-carbon phase diagram in which we have to analyse the phase changes from 1500…

Question 7: The illustration shows the iron-carbon phase diagram. 1600 1400 1200 1000 800 600 1538C -1493 C 1394°C y. Austenite 912°C 0.76 0.022 a. Ferrite Y+L 2.14 Composition (at%C) 15 10 1147 C a+FezC L y+FeyC Composition (wt% C) 727°C 20 Cementite (FeyC). 25 2500 2000 1500 1000 6.70 Temperature (F) e) Describe the changes in phase compositions of a carbon steel with a carbon content of 1% (weight-%) from 1500°C down to 727°C with the help of the attached phase diagram and appropriate equations/reactions.

Question 7: The illustration shows the iron-carbon phase diagram. 1600 1400 1200 1000 800 600 1538C -1493 C 1394°C y. Austenite 912°C 0.76 0.022 a. Ferrite Y+L 2.14 Composition (at%C) 15 10 1147 C a+FezC L y+FeyC Composition (wt% C) 727°C 20 Cementite (FeyC). 25 2500 2000 1500 1000 6.70 Temperature (F) e) Describe the changes in phase compositions of a carbon steel with a carbon content of 1% (weight-%) from 1500°C down to 727°C with the help of the attached phase diagram and appropriate equations/reactions.

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

For a Fe-C alloy with a eutectoid composition, an austenite was rapidly cooled down to 450°C, held for 10 sec, and quenched to room temperature. What is the final microstructure based on its TTT curve? Amount Temperature of Transformation, C 700 600 500 400 300 200 Ae₂! Ae₁ Austenite unstable Ms. 10 10² 103 104 105 seconds Austenite stable 50%- 100 MF TELEP P 100% completed F+B Coarse Pearlite - Fine Pearlite -Upper Bainite (Feathery) Lower Bainite → Martensite + Bainite Martensite 1 1sec 1 min 1hr Transformation Time (Log. Scale) O a. 50% bainite and 50% martensite O b. 50% austenite and 50% bainite O c. 100% bainite O d. 100% martensite Finer Lamellac Bainitic Pearlitic Austenite Fine more Acicular Rapid Etching Martensitic cicular, Slow Etching V.P.H. 210 320 450 700 750
The following questions are based on a high carbon steel with a composition of 1,5% C and 98,5% Fe. Please refer to the Fe-Fe3C binary phase diagram in Callister and Rethwhich 1) a Name the phases present and calculate the amounts of these phases just above the eutectoid temperature b, Give the amount of austenite present at 1100°C. c. Give the amount of pro-eutectoid ferrite just above the eutectoid temperature. d. With equilibrium cooling just below the eutectoid temperature calculate the total ferrite. e. Why must the samples be quenched rapidly to obtain high hardness?
(c) in the Cu and Ag phase diagram shown in Figure 1.1, consider an alloy composition of 40 wt% Cu - 60 wt% Ag. Composton Ca RD 20 1200 우 100 2200 2000 1000 pnbn- :000 1600 8.0 1400 912 :200 G00 Sous :000 400 G00 200 0 400 100 40 60 Composition rwts AD Figure 1.1: Cu - Ag Phase Diagram i. What Phases are present in the Alloy at 800° C? i. What are the compositions of present phases if the alloy is cooled by 20° C? iii. What are the mass fraction of phases? If the alloy was further cooled by 2° C, determine the volume fraction of the phases? Take the densities of Cu and Ag as 8.96 and 10.49 g/cm' respectively. iv.
Given the Bi-Sb binary phase diagram: Alomic Percent Antimony 50 10 20 10 60 70 80 650- 90 100 830.755°C 600- 550- L 500- 4504 400- 350- 3004 271442°C (Bi,Sb) 250- 200- 10 40 50 60 80 90 100 Bi Weight Percent Antimony Sb a.) What type of binary phase diagram is Pb-Sn an example of? Teimperature "C
2) There is an aluminum-copper alloy. The phase diagram is given below. What heat treatment do you apply? Using this graph, how is it possible to increase the strength and hardness of this alloy? Consider this question within the scope of heat treatments. Composition (at % Cu) 10 20 30 700 1200 600 L a+ L 0 +L 1000 a 500 (CuAl,) a + 0 800 400 600 300 10 20 30 40 50 (AI) Composition (wt% Cu) Temperature (°C) Temperature (°F)
3. The figure below shows the phase diagram for a hypoeutectoid plain carbon steel. Assume that point c is slightly above 723 °C and point d is slightly below 723 °C. i. ii. iii. Explain the structure at points a, b, c, and d on the diagram. Determine the wt% of proeutectoid ferrite at point c. Determine the wt% of eutectoid ferrite at point d. Temperature (°C) 1000 900 800 700 600 500 400 0 100% Fe y+ a 0.02 a + Fe, C b 0.4 723°C y + Fe, C Pearlite 0.8 Weight percent carbon Fe₂C 6.67
The Fe-C phase diagram is given: How much of the Primary phase for a Fe-0.55% C alloy forms at 500°C? What is the weight fraction of the total cementite for the same alloy at 500°C? Composition (at% C) 5 10 15 20 25 1600 1538°C 1493°C L 1400 2500 1394°C y+L 1200 1147°C 2.14 4.30 Y, Austenite 2000 1000 912°C y+ Fe3C 800 1500 727°C 0.76 0.022 600 `a, Ferrite a + Fe3C Cementite (Fe3C) 1000 400 1 4 6. 6.70 (Fe) Composition (wt% C) Temperature (°C) Temperature (°F)
Q1 / Two metals Beryllium (Be) and Silicon (Si) have melting points 1282°C and 1414 °C respectively, are completely soluble as liquids but completely insoluble as solids . They form a eutectic at 1090°C containing 61 wt% Si -39wt% Be? Determine the following:- 1- Draw the thermal equilibrium phase diagram and identify all phases are present in diagram ,then sketches what happens in microstructure when the alloys containing , a- 10wt% Si, b-70wt%Si , solidify completely. 2- Determine the composition and the amount of each phase for the alloy which contain 15 wt% Si-85wt% Be at 1150°C If the alloy is hypoeutectic determine the amount of eutectic at 600 °C? or hypereutectic and
4. The figure below shows the phase diagram for a hypereutectoid plain carbon steel. Assume that point c is slightly above 723 °C and point d is slightly below 723 °C. i. Explain the structure at points a, b, c, and d on the diagram. ii. Determine the wt% of proeutectoid cementite at point c. iii. Determine the wt% of eutectoid cementite at point d. Temperature (°C) 1100 900 700 500 300 100 a + Y R 0 100% Fe 0.02 1.0 Fe, C 1.2 2.0 Fe,C Fe, C Pearlite 3.0 4.0 Weight percent carbon y+ Fe, C 723°C a + Fe, C 1 5.0 Fe,C 1 6.0 6.7
For 40 wt% Sn – 60 wt% Pb alloy at 150 oC (at point B) as shown in Figure, i. State the name of phase(s) present. ii. Calculate the composition(s) of the phase(s) present. 600 300 Liquid 500 a+L 200 400 300 100 200 100 20 60 100 (Pb) (Sn) Composition (wt % Sn) Temperature ("C) Temperature ("F)
The figure below shows Pb-Sn phase diagram. What is the composition of Pb and Sn at point 1? 1200 1000 Liquid a +L 779 C (Tg) B+L 6 800 8.0 71.9 G 91.2 600 400 200 20 40 60 80 100 (Pb) Composition (wt% Sni (Sn) Callister Jr., W.D., 2007 O a. 80 wt % Sn and 20 wt % Pb O b. 10 wt % Sn and 90 wt % Pb O c. 90 wt % Sn and 10 wt % Pb O d. 20 wt % Sn and 80 wt % Pb Temperature ("C)
Figure 1 show Eutectoid Plain Carbon Steel Phase Diagram. Please indicate the phases present and their corresponding weight fraction at points a, b, c and d. Show your tie-line and calculations based on Lever Rules. Temperature (°C) 1100 900 700 500 300 100 0 100% Fe 7 0.02 1.0 Fe,C 1.2 2.0 7 7 7 7 Fe, C Figure 1 Fe,C Pearlite 4.0 3.0 Weight percent carbon 7+ Fe, C 727°C a + Fe₂C 5.0 Fe, C 6.0 6.7