Why in TTT below and above the nose higher time need to start transition?
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Above nose: Critical energy required for diffusion is low because of less undercooling. as the undercooling increases the energy availability becomes high Below Nose: Temperature is not high enough to help in physical diffusion of atoms and hence transformation takes time.
Above nose:
Critical energy required for diffusion is low because of less undercooling. as the undercooling increases the energy availability becomes high
Below Nose:
Temperature is not high enough to help in physical diffusion of atoms and hence transformation takes time.
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