Foundations of Materials Science and Engineering
6th Edition
ISBN: 9781259696558
Author: SMITH
Publisher: MCG
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Chapter 9.13, Problem 72AAP
Draw time–temperature cooling paths for a 1080 steel on an isothermal transformation diagram that will produce the following microstructures. Start with the steels in the austenitic condition at time = 0 and temperature = 850°C. (a) 100% martensite, (b) 50% martensite and 50% coarse pearlite, (c) 100% fine pearlite, (d) 50% martensite and 50% upper bainite, (e) 100% upper bainite, and (f) 100% lower bainite.
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Using the TTT diagram for eutectoid steel, draw the specified cooling path on the diagram.
Indicate what phases you expect in the final product with percentage of each phase. Assume the material has been fully austenitized before cooling.
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Chapter 9 Solutions
Foundations of Materials Science and Engineering
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