Kinetics and Microstructural Control

Constant Cooling-Rate Transitions (C-C-T)

· Many materials are initially formed at high temperature and then cooled to room temperature rather than being transformed isothermally.
· The C-C-T curve shown is for a eutectoid (1080) carbon steel. Various cooling rate trajectories and the final microstructures are indicated.
· The T-T-T curve for this material is also indicated on the diagram.

From: Brick, Pense,& Gordon, "Structure & Properties of Engineering Alloys, "McGraw Hill (1977)