Below is a continuous cooling transformation curve for steel (upper) and for a silicate melt (lower).Describe the similarities and differences as follows.a. What is the critical cooling rate in each case?b. What phase(s) form in each case when the critical cooling rate is exceeded?c. What phase(s) form in each case if the cooling rate is very slow?8001400Ae lemperatureAustenite*peorlite begins10FI7001200Austenitepearlite complete 160010005009800Tronsformation stops400600300400Austenite -mortenstic structure200-Isathermal dogramContinuous transformatondiogromConstant rate coding curves - 100200Findl structureMortensite Morlensitei peorlilePeorite (softer, coorser-0.110?10Tronsformation time, secondsContinuous Cooling-Transformation (C-T)Diagram(Derived from the isothermal-transformation diagram for a plain-carbon eutectoid steel)1200GlassCrystallizationbegins11001000CriticalcoolingrateGlass-ceramic900Crystallizationends8007001021010101010 1012104Time (s)(logarithmic scale)Temperature, "F250FISTemperature (°C)O 100°C/minTemperature, "C

(a) Critical cooling rates: For steel: critical cooling rate for the steel is the minimum cool rate…

Answered: Below is a continuous cooling…

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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Using the isothermal transformation diagram given in Figure 2 for a specific material composition to answer the following (this is NOT an Fe-C steel!). NOTE: Assume that you begin with a single-phase sample of α at 790 C.a. What temperature on the diagram corresponds to the α-to-γ phase transformation temperature that would be found on an equilibrium phase diagram? Explain your answer. b. What temperature would provide the most rapid, isothermal phase transformation of α to γ? What would be the minimum time from onset of the phase transformation to its completion? c. On Figure 2, draw and label a cooling schedule (from 790 C) that will produce a single-phase α material at 100 C. How does the thickness of the piece of material influence your ability to create a single-phase α structure? d. Why does the time to initiate phase transformation become smaller as the temperature is reduced within the temperature range above the “nose” of the TTT diagram? Be specific, what process is…
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