HWCH10_Spring - IE 320 Spring 2003 Homework Ch 10...

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Homework Ch. 10 2 Introduction to Materials Science 10.1 Cite three variables that determine the microstructure of an alloy. 10.10 Below is a portion of the H2O–NaCl phase diagram: (a) Using this diagram, briefly explain how spreading salt on ice that is at a temperature below 0C can cause the ice to melt. (b) What concentration of salt is necessary to have a 50% ice–50% liquid brine at -10 C?
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3 Introduction to Materials Science 10.15 A magnesium–lead alloy of mass 5.5 kg consists of a solid α phase that has a composition that is just slightly below the solubility limit at 200 C. (a) What mass of lead is in the alloy? (b) If the alloy is heated to 350 C, how much more lead may be dissolved in the α phase without exceeding the solubility limit of this phase? 10.27 (9.26) A hypothetical A–B alloy of composition 55 wt% B–45 wt% A at some temperature is found to consist of mass fractions of 0.5 for both α and β phases. If the composition of the β phase is 90 wt% B–10 wt% A,
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HWCH10_Spring - IE 320 Spring 2003 Homework Ch 10...

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