The black region in the microstructure represents the alpha phase.
B. The composition of the alloy in weight percent A is approximately 79%.
What is equilibrium?
Equilibrium is a state of balance or a situation in which opposing forces or influences are balanced. In economics, equilibrium is the point at which the supply and demand for goods or services meet, resulting in a stable price. In physics, equilibrium is a state in which the sum of all forces acting on a body or system is zero, meaning the body or system is in balance.
This can be determined by looking at the phase diagram of the A-B system and finding the eutectic point (where the alpha and beta phases intersect). This point is found at 79% A and 21% B.
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