T-T-T diagram

A T-T-T (Time-Temperature-Transformation) diagram maps how different metals or alloys change their structure over time at specific temperatures. It shows how quickly a material transforms from one state to another, such as from soft to hard, depending on how long it’s held at a certain temperature. This helps engineers predict the resulting properties of the material, like strength or toughness, after heat treatment processes. Essentially, it’s a chart that guides how to heat and cool metals to achieve desired characteristics efficiently and predictably.