Problem 1. A sheet of BCC iron 1 mm thick was exposed to a carburizing gas atmosphere onone side and a decarburizing atmosphere on the other side at 725°C. After having reached steadystate, the iron was quickly cooled to room temperature. The carbon concentrations at the twosurfaces of the sheet were determined to be 0.012 and 0.0075 wt%, respectively. Compute thediffusion coefficient if the diffusion flux is 1.4 × 10 -³ kg/m²-s.

Given:Carbon concentration, Cc=0.012 % and 0.0075 %T=725o CDiffusion flux=1.4×10-8 kg/m2-s

Answered: Problem 1. A sheet of BCC iron 1 mm…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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An FCC iron-carbon alloy initially containing 0.15 wt% C is carburized at an elevated temperature and in an atmosphere wherein the surface carbon concentration is maintained at 1.0 wt% C. If after 49.5 h the concentration of carbon is 0.35 wt% C at a position 4.0 mm below the surface, determine the temperature in degree Celsius (°C) at which the treatment was carried out. O 1303 C 1094 C 1050 C 1388 C O 1022 C O 1700 C
Problem 1 A sheet of BCC iron 1 mm thick was exposed to a carburizing gas atmosphere on one side and a decarburizing atmosphere on the other side at 725°C. After having reached steady state, the iron was quickly cooled to room temperature. The carbon concentrations at the two surfaces of the sheet were determined to be 0.012 and 0.0075 wt%. Compute the diffusion coefficient if the diffusion flux is 1.4 x 108 kg/m2-s. Hint: Use Equation 4.9(Text Book) to convert the concentrations from weight percent to kilograms of carbon per cubic meter of iron.
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