Define an Fe-C martensite.
(a) Describe the following types of Fe-C martensites that occure in plain-carbon steels: (i) lath martensite, (ii) plate martensite.
(b) Describe some of the characteristics of the Fe-C martensite transformation that occurs in plain carbon steels.
(c) What causes the tetragonality to develop in the BCC iron lattic when the carbon content of Fe-C martenistes exceeds about 0.2 percent?
(d) What causes the high hardness and strength to be developed in Fe-C martensites of plain carbon steels when their carbon conent is high?