Why is martensite hard and brittle Choose all that apply alm

Why is martensite hard and brittle? Choose all that apply. almost all the carbon is in solid solution, creating solution hardening there are relatively few slip systems in a body centered tetragonal crystal it has been cold worked significantly the crystals are very small, so there are many grain boundaries Rank the following iron-carbon alloys and associated microstructures from the hardest to the softest. spheroidite with 0.8% carbon spheroidite with 0.25% carbon fine pearlite with 0.8% carbon coarse pearlite with 0.25% carbon

Solution

43- a,b

44-

Fine pearlite- spheroidite(0.8)- coarse pearlite(.25)- spheroidite(.25)