stored energy in deformed austenite
Posted: Wed Nov 25, 2009 2:26 pm
Dear Micress experts,
you know that the deformation in austenite accelerates the gamma-alpha transformation very much. On one hand, it increases the number of ferrite nuclei, which we can assign as the maximum number of new nuclei. On the other hand, the higher number of dislocation raises up the delta G terms in gamma-alpha transformation, which can affect directly the delta G term in the phase field equation.
I heard that we can include the extra term of delta G (from higher dislocation) as the 'stored energy in austenite for recrystallization' even if we do not have recrystallization. I want to know if the value for stored energy will go directly to the delta G term in the phase field equation? If so, we should see faster ferrite growth or bigger ferrite grains, right? And if we put too high stored energy, recrystallization in austenite can be triggered, right?
With many thanks in advance
nokkikku
you know that the deformation in austenite accelerates the gamma-alpha transformation very much. On one hand, it increases the number of ferrite nuclei, which we can assign as the maximum number of new nuclei. On the other hand, the higher number of dislocation raises up the delta G terms in gamma-alpha transformation, which can affect directly the delta G term in the phase field equation.
I heard that we can include the extra term of delta G (from higher dislocation) as the 'stored energy in austenite for recrystallization' even if we do not have recrystallization. I want to know if the value for stored energy will go directly to the delta G term in the phase field equation? If so, we should see faster ferrite growth or bigger ferrite grains, right? And if we put too high stored energy, recrystallization in austenite can be triggered, right?
With many thanks in advance
nokkikku