An iron alloy with a carbon content of 0.05% C is heated up to
912oC in an atmosphere that produces 1.20% C on the surface and
thus is maintained for 24 hours. Calculate the carbon content at
0.05 cm below the surface if (a) iron is CC and (b) iron is CCC.
Explain the difference.
C-Fe bcc (Q= 20.900
cal/mol Do = 0,011 cm2/s ) C-Fefcc (Q= 32.900 cal/mol Do = 0,23
cm2/s ), ferror (0,0685)= 0,077, ferror(0,192) = 0,2139