Refer to the Fe-C Diagram below to answer the following questions T( C) 1600 8. L 1400 (Fe-C y +L System) L+Fe,C 1200 1148°C (austenite) 1000 v +Fe,C 800 727°C a 600 a +Fe,C 400 Oi 6. C, wt% C 6.7 (Fe) 5 Fe,C (cementite)
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- What is a eutectic composition?The following is a hypothetical binary phase diagram with various temperatures highlighted as (T) where n corresponds to a numeric value. Use the diagram to L T2 answer the following questions: 1. How many solid phases are there in the T4 diagram? Ans.:_ 2. Identify the melting point of A & B? Ans: m, is & mg is T7 3. How many invariant points are there? Write To the reactions. Tu A WB Temperature toA substance exists in two solid modifications alpha and beta and also as liquid and vapour at a pressure of 1 atm alpha melts at a lower temperature to form liquid. Also alpha is denser than the liquid but beta is less dense than the liquid assuming that no meta stable equilibria are observed sketch p-t phase diagram show the significance of each point,line and region also show all triple points.
- Draw the phase diagram for each row on the table using the data and locate the phase on the phase diagramUse the data to plot the phase on the phase diagram for each row5. [Phase Diagram] (1) Here is Cu-Ag phase diagram and two cases (composition and temperature) are given below. At each case, (i) cite the phase(s) present(s), (ii) estimate the phase composition(s), (iii) weight fraction of the phase(s) and (iv) sketch its microstructure for the following alloy. () a. 71.9 wt% Ag-28.1 wt% Cu at just above 779 °C b. 71.9 wt% Ag-28.1 wt% Cu at just below 779 °℃ Temperature (°C) 1200 A 1000 800 600 400 0 200 0 α C (Cu) B 8.0 (Ca E) -Solidus Solvus 20 20 a + L Composition (at% Ag) -Liquidus 779°C (TE) 40 40 a + B Liquid 60 Composition (wt% Ag) 60 E 71.9 (CE) 80 80 B+L 91.2 (CBE) G 100 B H 2200 2000 1800 F 1600 1400 1200 1000 800 600 400 100 (Ag) Temperature (°F)
- KS) A binary alloy having 28 wt% Cu and balance Ag solidifies at 779°C. The solid consists of two phases a and B. Phase a has 9% Cu whereas phase ß has 8 % Ag at 779°C. At room temperature these are pure Ag and Cu respectively Sketch the phase diagram. Label all phases and temperatures. The melting points of copper and silver are 1083° and 96100 respectively us? Estimate the amount of a and B in the above alloy at 779°C and at room temperature.) b) Calculate the mass fraction of phases for 40% Cu alloy at 300 °C and TR c) What is the composition of the alloys in (b) following: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)How do you call in binary phase diagram, the line which is described as the locus of all system that represent the boundary between a single liquid phase and the two phases? Liquidus Eutectic point Critical point Triple point
- 1) Carbon will diffuse toward the edge of the unit cell during the phase transformation from >(FCC) to Martensite (BCT). Ture___ or False___. |What are the steps in determining phase compositions and phase amounts?What variable/s play a role in determining how and when phase transitions happen? (Check all that apply) Properties of the Material/Substance Pressure Temperature