To "polar" region
of grain
Use the buttons to vary the applied stress and temperature, observing
the effects these variables have on diffusion and grain deformation
At low homologous temperatures
there is not enough thermal energy
for significant diffusion to occur
and so the grain cannot deform
When there is no applied stress, there is no driving force for
diffusion in a particular direction and so no grain deformation
When σ is increased, there is a greater driving force for diffusion
towards the "polar" regions from the "equatorial" regions and
so, for a given T, the grain deforms faster at higher σ
σ/σy
0.9T/Tm
0.9