If we take a metal which is loaded elastically (near the yield point but still elastic) and heat it to a sufficient temperature, such that its yield strength drops, some of the elastic strain will be converted to plastic strain due to the new yield point being exceeded. If this is done for a short time such that subsequent recovery/recrystallization phenomenon are minimal, will overall dislocation density in the metal be increased?
Edward Vojcak
Yes dislocation density increases but it will be very small
about twice the fractional change in yield stress.
Differentiate s=C(p)^1/2 and divide by the equation (x=C(p)^1/2)
to get the fractional change in dislocation density p. where C~aGb.
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