(Solved): Figure Q1 displays the phase diagram for iron-carbon alloys. An alloy with composition of \( 1.1 \) ...

Figure Q1 displays the phase diagram for iron-carbon alloys. An alloy with composition of \( 1.1 \) wt\% \( \mathrm{C} \) is held at a given temperature. rigure un: pnase aiagram or re+c anoy. (a) In this phase diagram, what are the eutectic composition and temperature? Explain the eutectic transformation. (4 marks) (b) Identify the dominant phase at two different temperatures 1500 and \( 1400{ }^{\circ} \mathrm{C} \) Sketch the microstructure of the composite for each temperature (4 marks) (c) The alloy is cooled down to \( 720^{\circ} \mathrm{C} \), please answer the following questions (1) How many phases are present and what are their names? (3 marks)