We consider the Bi-Sn diagram (see figure 1).(1) Explain the solidification mechanism for an alloy at 30 wt % Sn.(2) This alloy is at 400C. what are:(a) The chemical composition of the phases?(b) The mass fraction of the phases?(3) The first nucleus appears during the solidification of an alloy with 90 wt % Sb.(a) What are the temperatures at the beginning and at the end of the solidificationfor this alloy?(b) What is the composition for this alloy?(c) Are there other alloys at this temperature (535C) with solid and liquid phaseswith the same compositions as this alloy?

The first nucleus appears during the solidification of an alloy with 90 wt % Sb.(a) What are the temperatures at the beginning and at the end of the solidificationfor this alloy?

A copper–nickel alloy of composition 70 wt% Ni–30 wt% Cu isslowly heated from a temperature of 1300C (2370F).(a) At what temperature does the first liquid phase form?(b) What is the composition of this liquid phase?(c) At what temperature does complete melting of the alloy occur?(d) What is the composition of the last solid remaining prior to complete melting?

Explain the mechanism of solidification of an alloy at 72 wt% Ag

Which of the following is wrong about a phase diagram?                                    Group of answer choicesRelative number of different phases can be found under given equilibrium conditions (c) It indicates the temperature at which different phases start to melt.It gives information on transformation ratesNo answer text provided.No answer text provided.

Equilibrium diagrams show what phase changes occur at what temperature in differentalloys. Answer the following questions about equilibrium diagrams:i) Draw the shape of a combination type equilibrium diagram. (5 marks)ii) The Iron-carbon equilibrium diagram is an example of a combination typebut it contains a eutectoid point as well as a eutectic point. Describe whathappens at these two points. (6 marks)iii) Describe the structure and properties of eutectoid steel at roomtemperature. (6 marks)iv) Briefly explain why the equilibrium diagram is important when heat treatingsteel.