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PHASE DIAGRAM, TTT DIAGRAM, Alloying effects, PHASE TRANSFORMATION, HEAT…

- - - - Different compostion of Fe
- - - - 1 specific Fe composition
- - - - :arrow_right:Moderate cooling
        
        Bainite
      - :arrow_right:Slow cooling
        
        Pearlite
      - Spheroidite
  - - - :arrow_right:Very rapid cooling
        
        Martensite
- - - - Proeutectoid : (Eutectoid Ferrite)
      - Hypoeutectoid : Less carbon (Ferrite)
      - Hypereutectoid : More Carbon (Cementite)
- - - - Heat to T below lower critical line
      - Regain some ductility
      - NO change of microstructure
    - - Gain sufficient ductility
      - Small equiaxed grains
      - No phase change
      - Used in steel & wire industries
      - Heating to T below lower critical line
    - - Highest ductility
      - Phase transformation occurs
      - Coarse pearlite, small & uniform grains
      - Often in low/medium steel
      - Heat to austenizing T