The temperature at which a solid metal changes from one phase to another.
In alloys, steel for example, this change generally occurs over a range of temperatures (known as the transformation range) rather than at a single temperature. The upper and lower transformation temperatures denote the limits of the transformation range.
Only the named transformations, such as the eutectoid transformation, take place at a single temperature and composition.
Transformation temperature
The temperature at which a solid metal changes from one phase to another.
In alloys, steel for example, this change generally occurs over a range of temperatures (known as the transformation range) rather than at a single temperature. The upper and lower transformation temperatures denote the limits of the transformation range.
Only the named transformations, such as the eutectoid transformation, take place at a single temperature and composition.