Rapidly cool to 625°C (1155°F), hold at this temperature for 10 s, rapidly cool to 400°C(750°F), hold at this temperature for 5 s, then quench to room temperature.martensiteproeutectoid ferrite ibainitefine pearliteaustenite%%%! %do% Using the isothermal transformation diagram for a 0.45 wt% C steel alloy (Animated Figure10.40), determine the approximate percentages of the microconstituents that form the finalmicrostructure of a small specimen that has been subjected to the following time-temperature treatments. In each case assume that the specimen begins at 845°C (1550°F), andthat it has been held at this temperature long enough to have achieved a complete andhomogeneous austenitic structure.

Answered: Image /qna-images/answer/87e73b4a-2eb5-49da-b070-10cd6436d28f.jpg

Rapidly cool to 625°C (1155°F), hold at this temperature for 10 s, rapidly cool to 400°C (750°F), hold at this temperature for 5 s, then quench to room temperature. martensite proeutectoid ferrite bainite fine pearlite austenite i 0 % % % ! de % ! %

Rapidly cool to 625°C (1155°F), hold at this temperature for 10 s, rapidly cool to 400°C (750°F), hold at this temperature for 5 s, then quench to room temperature. martensite proeutectoid ferrite bainite fine pearlite austenite i 0 % % % ! de % ! %

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 for a 1.13 wt% C steel alloy, determine the final microstructure (in terms of the microconstituents present) of a small specimen that has undergone the following time-temperature treatments. In each case suppose that the sample begins at 920 ° C and that it has been held at this temperature for the timesufficient to achieve a complete and homogeneous austenitic structure. (a) Quickly cool to 250 ° C, hold for 103 s, then cool to room temperature.(b) Quickly cool to 400 ° C, hold for 500 s, then cool to room temperature.(c) Quick cool to 700 ° C, hold for 105 s, then cool to room temperature.(d) Rapidly cool to 650 ° C, hold for 3 s and rapidly cool to 400 ° C, hold that temperature for 25 s and cool to room temperature.(e) Quick cool to 650 ° C, hold for 7 s, then cool to room temperature.
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