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Unformatted text preview: o C, hold for 100 seconds, then slowly cool to room temperature, reheat to 100 o C, then rapidly quench to room temperature. 4) A) austenite and proeutectoid cementite B) austenite and bainite C) austenite and bainite (much more bainite) 5) A) The microstructure of tempered martensite consists of extremely small and uniformly dispersed cementite particles embedded within a continuous ferrite matrix. The microstructure of martensite can either be twinned or parallelogram. B) Martensite is much harder but more brittle then tempered martensite because it has enhanced ductility and toughness, the continuous ferrite phase is a big reason for this. 6)...
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- Spring '07