Bainite

1. Bainite named for Edgar Bain formed when austenite cooled rapidly enough to avoid forming pearlite, but delayed long enough to prevent martensite

2. Bainite named for Edgar Bain formed when austenite cooled rapidly enough to avoid forming pearlite, but delayed long enough to prevent martensite diffusion dependent but does not form lamellar structures of pearlite

3. Bainite named for Edgar Bain formed when austenite cooled rapidly enough to avoid forming pearlite, but delayed long enough to prevent martensite diffusion dependent but does not form lamellar structures of pearlite like martensite, structure can be lathe or plate, suggesting shear as well as diffusion

4. Bainite named for Edgar Bain formed when austenite cooled rapidly enough to avoid forming pearlite, but delayed long enough to prevent martensite diffusion dependent but does not form lamellar structures of pearlite like martensite, structure can be lath or plate, suggesting shear as well as diffusion has some of hardness properties of martensite & some of toughness properties of pearlite

5. Bainite

6. Bainite

7. Bainite ferrite cementite

8. Bainite

9. Bainite

10. Bainite Lower bainite in high-carbon steels can be much tougher than corresponding Q + T steel Upper bainite - not especially tough