Please enable JavaScript.

Coggle requires JavaScript to display documents.

SPD - Coggle Diagram

- - - - but the uniform elongation does not improve. rather it saturates. it should improve with increasing vol% of twins
    - - Not sure if they do
    - - Slight increase in temperature removes any beneficial structure present
        
        SMGT samples show that surface grains below 70nm are more stable than grains away from surface and sized greater than 70 nm
        
        SMGT + HPT produces avg GS of 25nm and also shows remarkable hardness and thermal stability
      - Even storage of RT HPT samples and stored at RT for 1-2 years starts recrystallization
        
        SFE has an effect, lower the SFE, the higher the rate of recrystallization at RT
        
        Two reasons
        
        Increased stored energy as compared to high sfe metals because of lower dislocation annihilation and lower recovery
        
        Higher diffusion through lattice defects
        
        Higher SFE allows dynamic recovery during subsequent plastic deformation
        
        Higher SFE does not recrystallize as readily as low SFE metals but they undergo dynamic recovery to lower ductility
      - Can be stabilized through
        
        Through plastic deformation
        
        Or rapid heat rates
        
        HEating rates can delay the onset of grain coarsenining to an extent that annealling twins occur before grain coarsening
        
        This results in lower energy annealing twin interfaces that are more stable