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Bainite - PowerPoint PPT Presentation


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

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slide1

Bainite

named for Edgar Bain

formed when austenite cooled rapidly enough to avoid forming pearlite, but delayed long enough to prevent martensite

slide2

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

slide3

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

slide4

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

slide7

Bainite

ferrite

cementite

slide10

Bainite

Lower bainite in high-carbon steels can be much tougher than corresponding Q + T steel

Upper bainite - not especially tough