Chapter 10: Problem 1
Name the two stages involved in the formation of particles of a new phase. Briefly describe each.
Chapter 10: Problem 1
Name the two stages involved in the formation of particles of a new phase. Briefly describe each.
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Get started for freeMake a copy of the isothermal transformation diagram for an iron-carbon alloy of eutectoid composition (Figure \(10.22\) ) and then sketch and label time- temperature paths on this diagram to produce the following microstructures: (a) \(100 \%\) coarse pearlite (b) \(50 \%\) martensite and \(50 \%\) austenite (c) \(50 \%\) coarse pearlite, \(25 \%\) bainite, and \(25 \%\) martensite
(a) Briefly describe the microstructural difference between spheroidite and tempered martensite. (b) Explain why tempered martensite is much harder and stronger.
What is the driving force for the formation of spheroidite?
Briefly explain why the hardness of tempered martensite diminishes with tempering time (at constant temperature) and with increasing tem- perature (at constant tempering time).
(a) Briefly describe the phenomena of superheating and supercooling. (b) Why do these phenomena occur?
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