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Isothermal transformation diagrams (also known as time-temperature-transformation or TTT diagrams) are plots of temperature versus the logarithm of time, denoting the transformations of an austenitized alloy as it undergoes a heat treatment. Isothermal transformation diagrams are only valid for one specific composition of material, and only if the temperature is held constant during the transformation. Though usually used for alloys, they also can be used to describe the kinetics of crystallization in ceramic materials. Isothermal transformation diagrams are generated from percentage transformation-vs logarithm of time measurements.
Categories: Materials science | Physical chemistry | Phase changes
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isothermal_transformation". A list of authors is available in Wikipedia.|