Let us suppose a material has high planar slip density at room temperature.
How the planar slip density depends on temperature??
Especially at high temperature 1100-1500K ??
Does it exist ?? If not how the slip system behaves at such temperatures ??
Dear Santhosh Kumar,
Deformation implies the movement of crystallite parts on preferred crystallographic lattice planes or slip planes . The crystal parts shear along the slip planes in certain slip directions . The combination of a slip plane and a slip direction constitutes a slip system. This description does not need the concept of 'planar slip density'. The number of active slip systems increases with increasing temperature, e.g. due to cross slip.
Supposing that your question regards metals, deformation at the temperatures you indicated can probably taken as hot forming, i.e. low stresses yielding (nearly) instantaneous deformation above the recrystallization temperature. Again, the concept of 'planar slip density' seems unnecessary to describe the deformation at the temperatures you indicated.
planar slip is essentially on a single (or limited) slip systems eg in basal slip in HCP at room temperature.Same HCP may give way to wavy slip on multiple slip systems at some appropriate higher temperature.
I would distinguish between systems that are fairly insensitive to temperature (FCC metals, HCP basal slip) and systems that are not (e.g. BCC). In the latter, planar slip may transition into multislip because the critical resolved shear stress decreases substantially with temperature.
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