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2034hw4 - MSE2034 Homework Assignment#4 Max Score = 12/9(3...

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MSE2034 Homework Assignment #4 Due Thurs , Feb 11 , 20 10 Max Score = 12/ 9 ( 3 points extra credit possible) 1) [1 point] Your textbook states (on p. 82 ) that the typical ratio of vacancies to atomic sites in a metal at its melt temperature will be about 1:10,000. Using the following date for vacancy formation energies – and data from the front cover of the text on T[melt], density, and atomic weight – show how well this rule appears to work for the three common metals given. Metal Vacancy Formation Energy, Q V [J/mol] Aluminum 73,300 Gold 94,500 Lead 53,050 2) [2 points] Conditions for formation of substitutional and interstitial alloys are given on p. 84 of your text. Using this information, predict (a) which of the following eight combinations should form complete substitutional alloys; (b) which should form incomplete substitutional alloys; (c) which should form interstitial alloys; and (d) which should be completely insoluble in one another. Show your reasoning in each of these four cases ( i.e., state the conditions that apply in each case).
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  • Spring '06
  • RWHendricks
  • Chemical element, carbon concentration, surface carbon concentration, Interstitial Alloys, initial carbon concentration

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