(Solved): Eutectoid system (Iron-Iron carbon phase diagram) 54. Do iron and carbon form a solid solution wit ...

Eutectoid system (Iron-Iron carbon phase diagram) 54. Do iron and carbon form a solid solution with complete solubility? Why? 55. A small amount of \( C \) diffuses in iron forms an alloy called Ferrite \( (\alpha)(T / F) \). 56. C has limited solubility in Fe. Hence, adding more \( \mathrm{C} \) will hit a solubility limit and then a solid will precipitate (just like adding sugar in water to make syrup). The precipitate is called cementite (Fe \( \left.{ }_{3} \mathrm{C}\right) \) (T/F). 57. We call \( \mathrm{Fe}-\mathrm{Fe}_{3} \mathrm{C} \) phase diagram a eutectoid system because a eutectoid reaction occurs (T/F). Identify the eutectoid and eutectic points in the above phase diagram. 58. A eutectoid reaction is defined as