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