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Unformatted text preview: 3 . How far into the sheet from this high-pressure side will the concentration be 2.0 kg/m 3 ? Assume a linear concentration profile. b) By what mechanism will the nitrogen diffuse? Why? 4) Callister 6.6 Determine the carburizing time necessary to achieve a carbon concentration of 0.30 wt% at a position 4 mm into an ironcarbon alloy that initially contains 0.10 wt% C. The surface concentration is to be maintained at 0.90 wt% C, and the treatment is to be conducted at 1100C. Use the diffusion data for -Fe in Table 6.2. 5) Callister 6.12 The diffusion coefficients for carbon in nickel are given at two temperatures: T (C) D (m 2 /s) 600 5.5 10 14 700 3.9 10 13 (a) Determine the values of D and Q d . (b) What is the magnitude of D at 850C?...
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This note was uploaded on 04/03/2012 for the course ENME 382 taught by Professor Christou during the Spring '12 term at Maryland.
- Spring '12