What octahedral site is preferred by carbon?

[potatowhisperer]

in steel made with ferrite ( fe with bcc ) , we have tetrahedral and octahedral sites that the carbon can occupy , we know that carbon likes to occupy octahedral sites , but there are two kinds of them .
1 : on face centers , and 2 : on edge centers .
does carbon prefer one of them ? or does it occupy both of them ?

 

[drvrm]

does carbon prefer one of them ? or does it occupy both of them ?

i have seen this discussion in detail and post you a reference -
it says that carbon prefers the site which has deformations and edge sites may be preferred but i will see it and cofirm.

 

[drvrm]

i have seen this discussion in detail and post you a reference -

[PPT]voids_in_crystals.ppt - IITK - Indian Institute of Technology ...
home.iitk.ac.in/~anandh/E-book/voids_in_crystals.ppt
... the atoms may be present both in the lattice and interstitial sites (e.g. B in steel). ... Later on we will talk about tetrahedral and octahedral voids in FCC, BCC ...

the above site gives youu a detail picture of mechanisms.

 

[potatowhisperer]

sorry for the late reply , thank you so much for answering , it was strangely hard to find anything about it . the ppt does explain clearly why carbon prefers octa voids over tetra voids , it doesn t specify which octa void though , so i will just take it as there is no difference between the face centers and edge centers.