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Answer the following questions: 1. An alloy of Fe in y-Fe (FCC) with a uniform Fe concentration of 0.41 wt % is be treated at 1050 °C. The concentration

Answer the following questions: 1. An alloy of Fe in y-Fe (FCC) with a uniform Fe concentration of 0.41 wt % is be treated at 1050 °C. The concentration

Elements Of Electromagnetics
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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Answer the following questions: 1. An alloy of Fe in y-Fe (FCC) with a uniform Fe concentration of 0.41 wt % is to be treated at 1050 °C. The concentration of the Fe at the surface is brought to 1.5 wt %. How long will it take (hrs) to bring the Fe concentration to 0.74 wt% at a distance of 0.35 mm below the surface? Note: get the diffusion coefficient of Fe from the tabulation of diffusion data. 2. An alloy of metal AB with a uniform concentration of metal A at 0.55 wt % and a surface concentration of 1.35 wt% is to be brought down to 1.2 wt % at a position of 0.55 mm below the surface. How long will it take (hrs) to bring the concentration of metal A if it is treated at 1000 °C. Do = 4.8 x 105 m?/s and a Qd = 144 kJ/mol? %3D
Transcribed Image Text:Answer the following questions: 1. An alloy of Fe in y-Fe (FCC) with a uniform Fe concentration of 0.41 wt % is to be treated at 1050 °C. The concentration of the Fe at the surface is brought to 1.5 wt %. How long will it take (hrs) to bring the Fe concentration to 0.74 wt% at a distance of 0.35 mm below the surface? Note: get the diffusion coefficient of Fe from the tabulation of diffusion data. 2. An alloy of metal AB with a uniform concentration of metal A at 0.55 wt % and a surface concentration of 1.35 wt% is to be brought down to 1.2 wt % at a position of 0.55 mm below the surface. How long will it take (hrs) to bring the concentration of metal A if it is treated at 1000 °C. Do = 4.8 x 105 m?/s and a Qd = 144 kJ/mol? %3D
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