HKIE Professional Assessment - Materials Discipline Practice Questions - HKIE Professional Assessment - Materials Discipline (Hong Kong Institution Of Engineers) Exam

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In the binary Iron-Carbon (Fe-Fe3C) equilibrium phase diagram, what is the microstructural product formed by the isothermal eutectoid decomposition of austenite (0.76 wt% C) at 727 °C?

Pearlite (lamellar mixture of ferrite and cementite) Ledeburite (eutectic mixture of austenite and cementite) Martensite (supersaturated body-centered tetragonal phase) Bainite (non-lamellar aggregate of ferrite and cementite)

Correct Answer:

Pearlite (lamellar mixture of ferrite and cementite)

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