ISE212_HW1C_Answers

ISE212_HW1C_Answers - ISE212 Engineering Computing MATLAB...

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ISE212 Engineering Computing: MATLAB Spring_2007 Homework #1C Due: Monday >>> 3/05 Use the digital drop-box in blackboard to hand-in your HW to the TA. 1. In many engineering applications, it is necessary to have the surface of the metal components hard enough to resist wear and erosion, while having the core ductile and tough in order to withstand impact and shock loading. A common surface hardening process is called carburizing. Carburizing involves the diffusion of carbon into the surface layer of a steel component that has low-carbon content (less than 0.4% ). This is achieved in industry by placing the component in a carbon-rich medium at elevated temperature. The diffusivity (in cm 2 /s) is a measure of how fast diffusion occurs, and can be modeled as: D = D 0 e (–Q / RT) where: D 0 = diffusion coefficient Q = activation energy, j/mole R = ideal gas constant, 8.314 J/mole K T = temperature, K As iron is heated, it changes micro-structure, and its diffusion characteristics change. The values of D
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This note was uploaded on 04/16/2008 for the course ISE 212 taught by Professor ? during the Fall '08 term at Binghamton.

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ISE212_HW1C_Answers - ISE212 Engineering Computing MATLAB...

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