Interstitial solid solubility?

Question

What factors control interstitial solid solubility and how do they affect the fesultant interstitial solubility of carbon in ferrite and austenite.

What is the significance of these differences?

Answer 1

FOR EXAMPLE WHEN CARBON INTER INTO LATTICE OF IRON IT IS INTERSITIAL BECAUSE ATM OF CARBON IS SMALLER THAN IRON AND CAN DIFFUSE INTO LATTICE.

Answer 2

There is a process called cementation. Wrought iron can be changed into a low quality carbon steel, by surrounding the iron object with powdered charcoal and sealing it (in a clay vessel) away from oxygen. An ordinary wood fire is hot enough to cause the iron atoms to expand slightly. Some of the carbon atoms work their way into the structure. So I would guess that the major factor is heat. Perhaps the presence of other alloying elements would also allow more or less carbon to get in. That's all I know.