Solution This problem asks that we determine the position at which the carbon concentration is 0.15 wt% after a heat treatment at 1325 K when = 0.35 wt% C. From Equation 6.5 C0 Thus, Using data in Table 6.1 and linear interpolation erf (z) z 0.40 0.4284 0.4286 z 0.45 0.4755 And, = 0.4002 z Which means that And, finally = 1.26 10-3 m = 1.26 mm 6.16 Cite the values of the diffusion coefficients for the interdiffusion of carbon in both (BCC) and α-iron γ-iron (FCC) at 900°C. Which is larger? Explain why this is the case.
Solution This problem asks that we determine the position at which the carbon concentration is 0.15 wt% after a heat treatment at 1325 K when C0 = 0.35 wt% C. From Equation 6.5 Thus, Using data in Table 6.1 and linear interpolation z erf (z) 0.40 0.4284 z 0.4286 0.45 0.4755 And, z = 0.4002 Which means that And, finally = 1.26 10-3 m = 1.26 mm 6.16 Cite the values of the diffusion coefficients for the interdiffusion of carbon in both α-iron (BCC) and γ-iron (FCC) at 900°C. Which is larger? Explain why this is the case.
Homework__and_solutions.ch5_ch6.IMS.docx