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