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00000.452°C (AI) 12.6 L 577+1°C 1414°C (Si)-

00000.452°C (AI) 12.6 L 577+1°C 1414°C (Si)-

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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6.8 Suppose that a cast Al-1 wt% Si alloy, contains equilibrium Si particles 1 µm in diameter. This alloy is to be heat treated by first putting all of the Si particles back into solution. (a) Draw a set of schematic curves indicating what will happen during this process. Temperature °C (b) Indicate the initial conditions, the final conditions (once a new equilibrium is reached) and the boundary conditions during dis- solution. (c) Estimate how long the alloy should be held at 550°C so as to ensure that all of the Si is dissolved. Al-Si 1500 1300 1100 900 700 500 300 660.452°C 0 -(A1) 10 AI 12.6 10 20 20 30 30 Atomic Percent Silicon 40 50 Thom L 60 Them 577+1°C 40 50 60 Weight Percent Silicon 70 70 80 80 90 90 100 1414°C (Si)- 100 Si
Transcribed Image Text:6.8 Suppose that a cast Al-1 wt% Si alloy, contains equilibrium Si particles 1 µm in diameter. This alloy is to be heat treated by first putting all of the Si particles back into solution. (a) Draw a set of schematic curves indicating what will happen during this process. Temperature °C (b) Indicate the initial conditions, the final conditions (once a new equilibrium is reached) and the boundary conditions during dis- solution. (c) Estimate how long the alloy should be held at 550°C so as to ensure that all of the Si is dissolved. Al-Si 1500 1300 1100 900 700 500 300 660.452°C 0 -(A1) 10 AI 12.6 10 20 20 30 30 Atomic Percent Silicon 40 50 Thom L 60 Them 577+1°C 40 50 60 Weight Percent Silicon 70 70 80 80 90 90 100 1414°C (Si)- 100 Si
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