Micro structure from equilibrium diagrams

1. Jan 11, 2012

aiat_gamer

I have this question:
"What micro-structural features of metal alloys can be studied by using equilibrium diagrams and how? Can the equilibrium diagrams be used for some other purposes? What are the limitations?"

I think that only the composition of micro-structure can be predicted in a certain temperature in an alloy basically. They don`t actually give the shape of the micro-structure, do they?

2. Jan 11, 2012

pukb

The phase diagrams does not give the exact microstructure because the rate of cooling/heating in phase diagrams is extremely slow such that an equilibrium state is attained at any point. The practical situation involves cooling rates that are much higher than the equilibrium cooling rates.
Composition of alloy can be determined at any temperature using lever rule.
An approximate development of micro-structure can be understood using phase diagrams.