Answer to Question #126344 in Physics for sohaib Ahmad

Question

estimate approximately the atomic per cent of interstitial carbon required to fill all the core sites of edge dislocation in iron.assume the edge dislocation density to be 10^11m^-2

Answer 1

The size of a carbon atom is 170 pm, the diameter of an iron atom is 126 pm. Since atoms of carbon are "fixed" near atoms of iron, the percent of interstitial carbon is

$$\epsilon=\frac{170}{170+126}\cdot100\%=57\%.$$