For the following iron-carbon alloys and associated microstructures, rank them f

Question

For the following iron-carbon alloys and associated microstructures, rank them from the most ductile to the most brittle:

Alloy A: 0.20 wt% carbon, coarse pearlite    Most ductileMost brittleSecond most ductileThird most ductile Alloy B: 0.20 wt% carbon, spheroidite    Third most ductileMost brittleMost ductileSecond most ductile Alloy C: 0.75 wt% carbon, fine pearlite    Most ductileSecond most ductileThird most ductileMost brittle Alloy D: 0.75 wt% carbon, coarse pearlite    Third most ductileSecond most ductileMost ductileMost brittle

Explanation / Answer

As C % increases, less ductile the alloy , the coarser the pearlite the most ductile will be the alloy.

Alloy B 0.20 % carbon, spheroidite. The most ductile. Spheroidite is know as the most ductil for of steel

Alloy A 0.20 % carbon, coarse pearlite the second most ductile

Alloy D 0.75 % carbon, coarse pearlite the third most ductile   

Alloy C 0.75 % carbon, fine pearlite most brittle.

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