(Solved): Figure Q1 displays the phase diagram for iron-carbon alloys. An alloy with composition of \( 4.3 \m ...

Figure Q1 displays the phase diagram for iron-carbon alloys. An alloy with composition of \( 4.3 \mathrm{wt} \% \mathrm{C} \) is held at a given temperature. гiguie \( \boldsymbol{\alpha} \). rilase ulayiali ui re-v alluy. (a) What is the common name for Fe-C alloys at this composition? What is the main advantage at this composition? (4 marks) (b) Identify the dominant phase at temperature of \( 1200^{\circ} \mathrm{C} \) and \( 1000^{\circ} \mathrm{C} \). Sketch the microstructure of the alloy for each temperature. (4 marks) The alloy is then slowly cooled to room temperature (extrapolate the phase diagram). (c) How many phases are present? What are the names of the phases? Describe each of the phases. (6 marks) (d) Calculate the composition of each of the phase(s). (3 marks) (e) What is the weight fraction of each phase? Justify your answer. (6 marks)