Equilibrium cooling of a binary system with limited solid so

Equilibrium cooling of a binary system with limited solid solubility produced the following microstructure. Describe the expected mechanical/fracture properties and justify your answer.

Solution

>> When cooling occurs, then solubility of solid starts decreasing .

Here, alpha phase solubility starts decreasing with cooling.

>> Now, after a certain instant, it tries to separate or in simple words it tries to precipitate out, thus breakng the structure and thus, fracture occurs.