An iron alloy with a carbon content of 0.05% C is heated up to 912oC in...

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

Expert Solution

faster diffusion occurs in the loosen packed BCC structure leading to the higher carbon content at point 0.05 cm below the surface

samet mamat answered 7 months ago

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