Steel Microstructures
Microstructures in a eutectoid steel. (a) Pearlite formed at 720 oC, (b) bainite formed at 290 oC, (c) bainite formed at 180 oC, and (d) martensite. [from Functions of the alloying elements in steel, Bain, E. C., American Society for Metals, Metals Park, Ohio, USA, 1939.